Ecc99 otl headphone amp. Comes with high gain .

Ecc99 otl headphone amp Bluetooth input: featuring AptX HD encoding, the module has better range and is 5. Power is almost everything in headphone amps and the Little Dot delivers that into high impedance loads. being Zo = rp/(mu +2). The ECC99 offers almost twice the transconductance and one third the heater current draw of the 6AS7. The tube-filled amplifier cost an obscene amount of money, but it made the headphones sound as if they were worth their $1,400 price tag. The high output impedance will mean that your experience may not match mine or others if you use different headphones with it. You may modify the amp a little bit, if you prefer a single ended sound for your guitar. in the ecc99 datasheet i rode '4x ecc99 - 10w' and i thought great, there should be way to get at least 0. My guess would be that the high amp psu is better but in the forum people have reported considerable sound quality upgrades moving from resistor load to CC so the T1s with CC would probably be better than the Antares. Edcor's XPP15-8CT-7. ECC99 is a 9-pin double triode usually used as a driver for directly heated power triodes (i. This circuit is very similar to P. It may be the closest thing to a benchmark OTL headphone amplifier on the market. Many amps run 6sn7. 98 views. Ships 1-3 days . Sometimes I use a solid state DAC/AMP, depending on where I am. Typically, purists will reach for an OTL amp for high-impedance headphones with transformer stages seen as limiting the potential of their gear performance. Their signature design always involves real wooden accents. The signal input is at the lower control grid, while the output is connected to the lower anode. amplifier Looking for Power Transformer for ECC99 OTL Headphone Amp Electrical Engineering Stack Exchange. It's a pure Class A design with no output transformer. In my application, the output will usually be used as a line output, and only occasionally with headphones. It is an all-tube output-transformerless (OTL) design, intended to This is The V8 OTL headphone amp puts out 32 watts per channel ar nearly 3 amps of current. And after a couple of months, the time has come for Euforia Evo, the latest headphone amplifier in Feliks Audio lineup. To date, Mike has The figure 1 below shows the schematics of the line stage of the MCML05 pre-amp with the ECC99 double triode. 1yr warranty. Just two tubes Looking for Power Transformer for ECC99 OTL Headphone Amp. 5W of output power. I built an OTL head phone amp using long tail pair input 6DJ8 to a cathode follower, 2 tubes 5687 paralleled (4 triodes) and it drives my 64 ohm Sennheisers louder than I care to listen. Cheers! Reply. Share Reactions: MindBreak, chrisnyc75, Blindranger and 4 others. all the best amp for 4 ohm headphones You won't find a "headphone amp" that has 4 ohm capability because by definition a headphone amp is designed to handle the much higher impedance of headphones, anywhere from 40 to 600 ohms. The first half of the tube is used as as common cathode amplifier with a constant current source on the anode, and the second half is a DC-connected cathode follower, again with a CCS. Note the much higher B+ voltage. The front panel LED is useful to gauge whether the amp is on because the tube glow can be hard to see in bright light. OTL amplifiers exist entirely because of marketing. Right now I am literally waiting for paint to dry as I’m doing a hammered The Elise OTL Tube Headphone Amp is a high-end output transformer-less (OTL) headphone amplifier and preamplifier featuring PsVane 6SN7 and 6N13S tubes. 2023-03-21 8:24 pm #12 2023-03-21 8:24 pm #12 But also allows you to plug a non-OTL headphone amplifier and “tube your planars” (set the Mk2’s volume to 60-70, forget it, RCA out to an headphone amplifier and control the volume there). I have both the HT power supply and the heater supply in two enclosures separate from the main circuit, for a three enclosure circuit. They also work well in the output stage of headphone amps, preamps, and CD players. Joined 2017. That is good as it is push pull and has a very low output impedance. As I looked through my vast array of SPICE circuits, I found the hybrid, class-AB-C headphone amplifier. Aikido-6N5P6N6P-32-ohm-Headphone. Why tubes you might ask, well, because they are awesome. They provide a very slow turn-on to ensure the ECC99 is fully heated. At $1099, the entry point to their lineup is the Echo MKII OTL tube amp, which has some cool I notice that they have a picture of the Stealths hooked up. The high output impedance will mean that your experience may not match mine or others if you use different in the ecc99 datasheet i rode '4x ecc99 - 10w' and i thought great, there should be way to get at least 0. Be aware that you won’t get all of the benefits of the OTL headphone amp from the RCA out (obviously). $1000+ $501-1000; $401-500; $301-400; $201-300; $101-200; Up To $100; Features; Show Reports; Headphones. a driver stage using a ECC99 and cathode followers using a ECC82 tubes. Do things with Valhalla 2 that you’d never attempt with other OTL tube amps. T. While there is DC on the output at I'm planning on building an OTL headphone amp using a pair of ecc99 (I got matched pair of soviet 6n6p in my hand). (From: Rudolfs Putnins) Recommended headphone impedance: 100 ohms – 600 ohms (amp is not well suited for planar magnetic headphones and low impedance headphones due to OTL topology) DAC Section: DAC Chip: ES9018K2M; Sampling rate: PCM 16-bit – 32-bit / 44. The 6C33C-B are themselves driven by DC coupled parralleled 7044 triodes, similar to ECC99 or 5687 types, one bottle per side from the diff-amps. This is a transformer-free push-pull headphone amplifier operating on the OTL circuit in Class A. I have the last generation LYR, the Lyr3, that I run with either a tube or the LSSST FET, and a modified STAX older amp for e-stats. 5w from one. I suggest that you look at low powered tube amp with a 4 ohm speaker tap and then wire a female stereo phone plug jack to the amp I am always curious when such a question arises--what would you improve? I do not think there is a problem that needs addressed, the bugs got worked out in 2. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. 5 watts into 8 ohms, 3 watts into 16 ohms. Instead, this is a pure headphone amplifier Bottlehead’s basic headphone amplifier kit, the “Crack”, is probably the most well known, and best regarded, kit-based/DIY headphone amplifier there is. I recommend you to build it as is. Eliminating output transformer Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Latest is an ECC99 White cathode follower output with a 12AT7 as input tube. There are 2 ways to better the performance of the OTL amplifers: use octal tubes (more linear than noval), or use a single stage instead two. An ecc99 has a 2. The problem with many tube headphone amplifiers is the high output impedance and the Stack Exchange Network. It can be used without any Select Comparisons. I'm planning on building an OTL headphone amp using a pair of ecc99 (I got matched pair of soviet 6n6p in my hand). Voltage . Forums Amps/DACs: Cyan 2 > ZMF Reference OTL / V550, RU7, Piety. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Great for Please feel free to ask any questions and to post comments about the DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project in this forum thread. The 47 ohm resistors are really just to drop some extra voltage to lower dissipation in the supply CCS. but I never measured power output, since I intended it as headphone amp only, and few watts is plenty I did measure distortion, I may Looking for Power Transformer for ECC99 OTL Headphone Amp. 5dB) and a good inductance value to build a perfect headphone amplifier to drive headphones with impedances from 150 to 600 ohms. I am thinking of a simple two stage 6N1P-EV -> 6C33C-B. 3V heater only. How We Score; Recommended Gear; Search By Price. This anode is not fed by an No. The ECC99 tubes run really hot, so it’s more of a precaution then it is a design choice. Run low-impedance headphones. It is priced at $454. nm_west and dunkyboy like this. DOWNLOAD PDF. The 2k load was easy to drive and only required a 6µF coupling capacitor. The Elise OTL Tube Headphone Amp is a high-end output transformer-less (OTL) headphone amplifier and preamplifier featuring PsVane 6SN7 and 6N13S tubes. I'm using a TPA6132 headphone amplifier connected to a stereo (TRS) output socket. I use them for the output of my OTL headphone amp. Location: Brooklyn, NY. Go ahead. Does it seem a reasonable proposition to run those on this amp? As you can see from measurements that Schiit provides, this amp is extremely distortion forward, producing significant 2nd, 3rd, and 4th order overtones for not just the fundamental signal but also the 60 Hz switching power supply Even though the Botttlehead Crack is the best known tube headphone amp from Bottlehead, it has its limitatations by design, it was designed for higher impedance headphones 120 + ohms. fdegrove. 93; asked Oct 7, 2021 at 4:39. Output power is over 100 mW between 32 ohms to 300 ohms. Here is high-voltage version of the circuit that is meant to double as high-quality line-stage amplifier and 300-ohm headphone amplifier. Eliminating output transformer would reduce the complexity of the circuit and the power-supply; amplifier; audio; headphones; tube; Bottlehead’s basic headphone amplifier kit, the “Crack”, is probably the most well known, and best regarded, kit-based/DIY headphone amplifier there is. The sound Feliks Audio has gained a reputation for building OTL and Tube headphone amps that look amazing and sound even better. The ECC82 is a 12AU7 medium gain pre-amplifying double triode design. However, the lowest impedance phones it was tested with were 64 ohms and the particular phones used, Sony V6, have a very high sensitivity of 106dB/mW so they would need very little power. More finite control over volume, more weight, extension, liquidity and space is what it’s all about. Amongst the Feliks line, the Elise falls in a sonic middle ground between euphonic coloration and detail retr. Writing a review after Mike’s interesting and complete 2 page impressions on Facebook isn’t easy, so don’t shoot me if this review turns out Most tube manuals state that the 6DJ8’s plate voltage limit is 130 volts, whereas the ECC99 is 400 volts. the goal is to drive a pair of HD660s with ease and maybe even something Auris Audio is a Serbian brand that mainly builds HiFi tube amplifiers and headphone amps but they also produce speakers and even turntables. by Andrea Ciuffoli. Even so ripple is only 45mA before the regulator. As a preamp I tried the Decware OTL as a preamp to my solid state CFA-3 headphone amplifier, and to my TC Auris Nirvana headphone amplifier. Bottlehead’s basic headphone amplifier kit, the “Crack”, is probably the most well known, and best regarded, kit-based/DIY headphone amplifier there is. 1 OTL this weekend. 6K might be a good one for PPP 6n6p. The amp is designed for 250-300R headphones. This limitation at the frequency extremes is This scheme uses 100% neg feedback only around the O/P stage employing differential amplifiers (6SL7 tubes) for each 'Half' or 'side' of the O/P stage, both fed from the phase-splitter. The fellow showing the 300B-based, balanced Then I remember my little chinese SE headphone amp and go back to the makers website. I am With high impedence cans I have been happiest using an OTL Tube amp. Comes with high gain We’re thrilled to introduce the xDuoo TA-66, an OTL headphone tube amp that merges classic engineering with the convenience of modern components. This anode is not fed by an Headphone amp: rebuilt around the TI OPA1622 chip, the MK2 headphone amp has better dynamics and higher gain (142mW@32Ω). Low sensitivity headphones will produce less audible Stack Exchange Network. The 6336/6AS7G/6080 are more microphonic than usual. S. Amongst the Feliks line, the Elise falls in a sonic middle ground between euphonic coloration and detail retr Top-Level OTL Tube Headphone Amplifier. 1 BT compliant. It is an all-tube output-transformerless (OTL) design, intended to This is the tube pairing I keep returning to as well! The 7316 long plate foil-d getter opens up the soundstage and The HA-2SF uses four JJ Electronics ECC99 9-pin double triode power tubes as opposed to the HA-2SE+ classic EL95/PL95 lineup and a single input JJ Electronics ECC82 tube. High quality low power listening to Single-Ended OTL Headphone Amplifier I wanted a tube-based headphone amplifier that could power (without an output transformer) my 25-ohm Audioquest headphones, with a SPL sensitivity: of 99dB/mid-woofer; besides, I had been An OTL headphone amp with a 6N1P in ground cathode for input stage and a 6N6P in SRPP for the output stage. Use IEMs. And we didn’t just stop there! Hpa is not only a fully enclosed state-of-the-art headphone system which includes a high-grade USB DAC As a hobby project I decided to build a tube headphone amplifier. Home; Gear Guide. Nice looking kit! THE WATERCOOLER HEADPHONE EDITION – Headphones, Amps, DACs, and desktop/home audio related – a freewheeling discussion of gear, impressions, music, and musings. But for headphones, I just use 6N6P/ECC99 like this: Attachments. Only some tube amplifiers do. Can be used instead of 5687, E182CC, 6840 Building tube-based headphone amplifiers for high-impedance headphones, such as the 300-ohm Sennheiser headphones, isn't all that hard. 2004-02-13 8:07 am #3 2004-02-13 8:07 am JJ's stuff has always been VERY This is the place to discuss the Feliks Audio Elise OTL Mark II Headphone Amplifier (From Feliks Audio Website) Technical Specification - Model 2019 Input Impedance: 100 kOhm Frequency response: 10 Hz - 60 Khz +/- 3 d Still trying to figure out if tomorrow will work may push for next week do to the holiday Edit: going to shoot for next week! Will update with Virtus-01- OTL Single Ended headphone amplifier (without output transformer, class A) in the Dual Mono architecture. The power That kit was my first valve amp project. Visit Stack Exchange Up to now we have only looked at planar magnetic headphones as high impedance dynamic driven headphones in general prefer OTL designs. The basic OTL headphone amplifier circuit is pretty well established, I don't think any special sauce is The HA-2SF is an analog SET headphone amplifier with preamp output. Came well packed. I didn't use the same HT power supply as the posted is OK if the headphones are constantly plugged in to the headphone amplifier since the high voltage power supply ramps up slowly. Joined 2002. Eliminating output transformer would reduce the complexity of the circuit and the power-supply; amplifier; audio; headphones; tube; BHC Build Notes: August to September 2021 I ordered the BHC and Speedball upgrade kit during an August 2021 Bottlehead sale. – Feliks Echo 2 is an OTL AMP, which comes with many differences, both advantages and disadvantages. Building, troubleshooting and testing of these amplifiers should only be Good caps. All the best, Claas Power is almost everything in headphone amps and the Little Dot delivers that into high impedance loads. Review: xDuoo TA-26 Budget OTL Tube Headphone Amplifier. Small film caps can be used because the CCS-fed shunt (the supply CCS & gas reg tubes in the amp) provide excellent isolation. The SRRP stage is configured as an anode follower and uses a negative-feedback loop to lower its output impedance and distortion. But tubes are fairly simple to work with, look Bottlehead’s basic headphone amplifier kit, the “Crack”, is probably the most well known, and best regarded, kit-based/DIY headphone amplifier there is. This article shows my tube headphone amplifier designs for driving headphones with an impedance of 200 to 600 ohms (I am using these amplifiers with the Sennheiser 580, which has a 300-ohm impedance). 0 votes. Berning amplifiers convey the musical transparency of tubes without the limitations imposed at the frequency extremes by audio output transformers. I think this design just uses the Russian equivalent tube. Jan 9, 2025 at 10:13 PM. You may find that 13Kohm increases the output impedance? I see you've switched the input tube to ECC83 Heya, If you're looking for a beast of a tube amp that will output enough power to satisfy volume and push those drivers to get what you can out of your headphones, the Little Dot MK III is the best performer for the price out of the little dot line. 2004 Bottlehead’s basic headphone amplifier kit, the “Crack”, is probably the most well known, and best regarded, kit-based/DIY headphone amplifier there is. The HA-2SF uses four JJ Electronics ECC99 power tubes and a single input JJ Electronics ECC82 tube. Looking for Power Transformer for ECC99 OTL Headphone Amp. 3mm Headphone Jack at the front, or you plug a 2XRCA connection to the back of Feliks Echo into another Amp, where it will be used as a Pre-AMP. amp for 4 ohm headphones You won't find a "headphone amp" that has 4 ohm capability because by definition a headphone amp is designed to handle the much higher impedance of headphones, anywhere from 40 to 600 ohms. 1 The Apex Teton is a single-ended output transformer-less (OTL) pre-amplifier and headphone amplifier designed and made by Pete Millet and sold exclusively through Todd the Vinyl Junkie. Im in the middle of an OTL headphone amplifier, so far i have been moving forward with the 6AS7 tubes for the output and 12AU7 for the input stage. Despite being Feliks’ entry-level amplifier, the Echo is no slouch when it comes to presenting a highly musical and well-extended sound. Preamplifying tubes. Works great. Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. Joined 2022. I have an OTL headphone amp that uses one 6n1p-ev and one 6n6p-i per channel. Click to expand Thanks! fdegrove said: JJ's stuff has always been VERY good i. With some headphones this may not be an issue. 3Kohm plate resistance for example. Drive it with decent current like 1/2 of a ECC99 and you're in business 😉 Cheers, 😉 At the other extreme, an eight-tube OTL headphone amplifier could use noval tubes and require a much smaller enclosure. I am very satisfied with result. The top amplifier's functions as a non-inverting amplifier and its gain is set by (28k + 2k)/2k or 15; the bottom amplifier is inverting and its gain is set by 30k/2k or The 6DJ8 tube headphone amplifier is suitable for use with many Hi-Fi headphones. Eliminating output transformer would reduce the complexity of the circuit and the The Euforia evo amplifier’s price tag isn’t the lightest, but I feel the asking price is fully justified for an OTL headphone amp + pre-amp of this calibre. For example, the Pendant can run 12au7 tubes. The ECC88 isn't as beefy as the ECC99/12BH7/6CG7 etc so can't deliver as much current, though I'm not sure if that is the issue here. For example, with an ECC99 output tube, an output impedance of a little over 100 ohms would result. Coax input: new this year, a coax input with sample rate of 192k@32bit. The cheaper one uses 6H6PI as power (seemingly equivalent of ECC99, E182CC, and possibly 6H30) whereas the dearer one uses 6H30PI as driver. The JJ ECC99 is a unique design recommended for use as a driver for power triodes like the 300B and 2A3 and in the output stage of headphone amps, preamps, CD players and small Top-Level OTL Tube Headphone Amplifier. e. Valhalla 2 is a very flexible tube amp! Tubes Made Flexible. Technical Parameters: One (1) Year Limited Warranty (tube lamps are I'm planning on building an OTL headphone amp using a pair of ecc99 (I got matched pair of soviet 6n6p in my hand). It is an all-tube output-transformerless (OTL) design, The amp was designed around the ECC99/12BH7A and the 6N6pi/6CG7 but others will work assuming they have similar specs and the same pinout. The circuit board has a simple toggle switch to select single 6. Many fans of OTL amps such as the Darkvoice 336 and Bottlehead Crack are well aware of the magical attributes these amps can have when paired with a suitable set of cans. 1 arrived today. Coming Therefore, we decided to follow a different and more challenging path by designing Lab12 Hpa as a full blooded OTL tube headphone amplifier with the utmost transparent, musical and emotionally engaging heart. Our main source was a mix of the Ladder Schumann DAC and the balanced line out from the Berning amplifiers depart from traditional OTL amplifiers in that they do not require a large number of hot power tubes to supply adequate current for driving speakers. I went hunting. B+ is 200V right now but this can be adjusted I just don't want to face any huge issues with the 250V rating of the 6AS7's. Still, maybe 50% of it. Something like the Raven will outperform The LL2765 is a fine transformer with ECC99 output tubes in this circuit. I have attached a current picture. It has a top-loaded tube configuration of four JJ Electronics ECC99 9-pin double triode power tubes and a single input JJ Electronics ECC82 tube. The basic OTL headphone amplifier circuit is pretty well established, I don't think any special sauce is Tube Compliment: 8-EL509 and 1-12AX7, 1-ECC99 Classic Car Guy, Sep 30, 2021 #14. Top Reader Voted Headphones; The gain stage need not provide a lot of amplification, though, and can be the other half of a twin-triode ECC99. be built using many different tubes. The next custom OTL I am getting will run 2x 6J5 natively, so this route made the most sense to me. The Feliks Audio EUFORIA evo is the 3rd iteration of their popular EUFORIA OTL headphone amplifier series which started way back in 2017 and then followed up with the 20th Anniversary Edition in 2020. 300B and 2A3), but in some applications can be used as power tube (headphones amps, small power amps). How small? Imagine a narrow but deep chassis, say 2-inches tall, 6-inches wide and 10-inches deep. V8 Tube Headphone Amplifier Large. . Eliminating output transformer Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site If you haven’t tried utilizing a good pre-amp into your solid state or transformer powered tube amps, this is your chance! There’s no amp I’ve plugged the ZMF Reference OTL into that hasn’t become a beast. skyra. Home. Sound-wise there’s nothing bad to say at all, and the evo beautifully mixes a high technical level, with a good amount of body, dynamics, and musicality. The response is 20 Hz to 28 kHz within 0. The best sounding one is the Bottlehead Crack w/Speedball upgrade, driving Sennheiser 600. Project Link - DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project _____ Visit the DIY Audio Projects websites: DIY where the builder made " ECC88 OTL heaphone amp" using 3 of ECC88 tubes, and Well I will start off with saying I am a fan of OTL amps when paired with the right headphones, there is an effortless quality to their sound when paired with high impedance dynamic headphones that a lot of solid state amps can’t match. Stacking amplifier as shown on manual cover will increased hum. The most powerful is DarkVoice 336 SE, which Having very little experience trying minimize tube distortion I figured I'd start small and make myself a little tube headphone amp maybe even spring for a new set of headphones too everything seems to be OTL designs. Joined 2003. Plug Type $ 249. Musical, engaging and analog sounding, this is a great amplifier with competitive technicalities, great tube rolling potential and plenty of power to drive all high Z headphones. The 510k resistor adds some Aikido mojo and greatly improves the PSRR, which is critical in a Any tube amp with a transformer on the output is "balanced". The sound of this version is very “real” and so detailed that you can hear the quality of the source CD player and CD music. 00. Here, I allowed no compromise to get the best sound for this type of application. emrr Well-known The Little Dot MK III SE is a fully balanced hybrid tube headphone amplifier offering up to 2. 6N6P is roughly similar to ECC99, but with 6. In contrast, driving low-impedance headphones, say 16 to 50 ohms, demands more current than most vacuum tubes are capable of delivering. png. Visit Stack Exchange Otl Headphone Amp Schematic, ECC822 Tube OTL headphone amplifier circuit diagram amplifier_circuit Circuit Diagram, My Vacuum Tube Headphone Amp Project Radio World. It is an all-tube output-transformerless (OTL) design, intended to pair with high-impedance headphones, such as the Sennheiser HD6XX line. 3V The xDuoo TA-84 might be Drop’s first all-tube, OTL headphone amplifier but I think that is their best sounding product thus far. Constant current is going to help the T1S. If you are looking at this review, Don't know if this is in any way helpful, but I have a preamplifier using the ECC99. I suggest that you look at low powered tube amp with a 4 ohm speaker tap and then wire a female stereo phone plug jack to the amp I have been getting excellent results from the JJ ECC99 dual triode tube. Blue Gecko Peace. Finish. I am always curious when such a question arises--what would you improve? I do not think there is a problem that needs addressed, the bugs got worked out in 2. (To be honest, I don’t buy the unnaturally low maximum plate voltage for the 6DJ8, which I believe only refers to its use in a cascode The figure 1 below shows the schematics of the line stage of the MCML05 pre-amp with the ECC99 double triode. -1 (1). F. TRIODE OTL HEADPHONE AMP AND PREAMP. Moreover there are plenty of those around at about 10 $ a piece thanks to the military. This is a kit for a OTL headphone amp. As the main valves, anything from ECC88 to ECC99 / 6N6Pi or 6N23Pi works great. The H5 is no different, there is a fullness and fluidity to its sound that makes it one of those amps that you spend less time In fact, the Aikido noval stereo PCB might be the best choice, as we have so many more tube choices, such as the 6N6 and 6H30 and ECC99. 5 KB · Views: 351 Last edited: 2019-08-09 6:41 pm. Output transformer trades output voltage swing for higher output current and lower output impedance. 5 dB and the wide band signal-to-noise is -84 dB. but i see the impedance would be another obstacle. If you want one that is differential all the way through, make it push pull. For sale new handmade headphone tube amplifier. 6k6 sounds about right for PPP 6n6p. As standard, 6922 EHG or equivalent of the popular ECC88 are used as driver tubes. Eliminating output transformer would reduce the complexity of the circuit and the power-supply; amplifier; audio; headphones; tube; I am afraid don't have any experience of the T1s, or ecc99. This old-school engineering method paired with modern amenities For this reason—among sonic preferences—we chose an Output Transformerless (OTL) topology for the amp, since it pairs so well with high impedance loads. The big output capacitors required are not well suited to the task and modern headphones are particularly sensitive to DC Looking for Power Transformer for ECC99 OTL Headphone Amp I'm planning on building an OTL headphone amp using a pair of ecc99 (I got matched pair of soviet 6n6p in my hand). The plot above shows The two OpAmp amplifiers put out equal output signals in anti-phase. 1 answer. The design comes from John Broskie, it is a 6CG7 / E88CC Aikido amp, essentially a gain stage with an active load and a optimized White Cathode Follower circuit. Source & Line Analogue Source Analog Line Level Digital (=E88CC = 6DJ8 = 6922); 6N2P-ER I must admit that I do have fond memories of listening to my Sennheiser HD-414s with my 6DJ8-based SRPP OTL headphone amplifier back in my college days. 1 kHz – 384 kHz, DSD64 – DSD256; THD+ N: 0. Milletts SRPP design which uses the ECC99. It will drive your 250 ohm Beyerdynamic DT 880 headphones with ease. 1. And it has the natural, relaxed sound that you can only get from tubes. It will allow you to configure the operation of the amplifier with headphones of different impedances: from 32 . ECC81 - 12AT7 ; ECC82 - 12AU7; ECC83S - 12AX7, 7025; ECC83MG / 12AX7MG; 5751; 12BH7-A; ECC802S; ECC803S; Hybrid Headphone Amplifier The last old memory to trickle back into my mind was that I had long ago designed a fully symmetrical hybrid OTL amplifier that used both PNP and NPN transistors to create a constant-transconductance output stage. These two OTL headphone amps use a White follower output stage. Also available with current Balanced triodes for phase inverter ECC99 R. WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. Description Specs FAQ Reviews Downloads. Visit Stack Exchange Later on, I had an opportunity to listen to Feliks Echo 2 and I was impressed that such a cheap (regarding its handcrafted in the EU, €899 isn’t so much) OTL amplifier can sound that good. This article shows my tube headphone amplifier designs for driving headphones with an impedance of 200 to 600 ohms (I am using At the output of the SE amp I have installed resistive voltage divider 12R/1R, and the lower 1R resistor serves as a signal source for Denon 9200 headphones. At $5000, it is half the price of the Subjective Headphone Amplifier Listening Test I started testing with the Sennheiser HD-650 and the result was unexpected: almost infinite amount of power with warmer/nicer amount of bass. Great sound without any sound distortion. The following comparisons to the HA-2SE+ were completed using a mix of high-impedance headphones including the Sennheiser HD660s 2, and the ZMF Headphones Atrium, (open-back version) as well as planars such as the Audeze MM-500. Phonostage: upgraded capacitors. Adding this extra gain stage to fully drive the ECC99 or 5687 would net about 1W of Class A power into 32 ohms, or an extra 10db over the 125mW version (remember that power and db have a Sparkos Gemini is a $995 USD Tube Headphone Amplifier with RCA inputs, RCA outputs, XLR Headphone outputs, and with Sparkos Labs SS2590 Discrete OPA Output Stage. It’s an excellent sounding little unit, with good potential for The HA-2SF uses four JJ Electronics ECC99 9-pin double triode power tubes as opposed to the HA-2SE+ classic EL95/PL95 lineup and a single input JJ Electronics ECC82 tube. Design wise I am sure this is an amp that will please many headphone enthusiasts. This tube is used in the JJ high end Hi-Fi amps. (ECC99). Normally, the objective measurement sins would be enough to give a vote of no confidence to Little Dot. 93; modified Oct 7, 2021 at 6:43. I switched to my standard HiFi Collective OTL Headphone Amplifier What is a OTL amplifier? OTL (Output Transformer Less) amplifiers are simply a type of amplifier that does not use a transformer to couple to the loudspeaker. While most tube OTL amps are Forum Home Amplifiers Solid State Pass Labs Tubes / Valves Chip Amps Class D Power Supplies Headphone Systems. A nice, slick design which is easy to use, a not too large footprint and mesmerizing VU I'm using a TPA6132 headphone amplifier connected to a stereo (TRS) output socket. Excellent condition ex-demo unit for sale. It is an all-tube output-transformerless (OTL) design, intended to I finally got a chance to start building my Crack 1. Tube have high output impedance. Tube amplifiers these days exist almost entirely because of The functionality is fairly simple, you plug in the necessary cables, you need a 2XRCA output from your DAC to the input of Feliks Echo, then either you plug a headphone in the 6. The 6n6p PP output circuits I've seen used a 12k opt. On the other hand, transistors are the masters of high-amperage current Good caps. The slow turn-on and turn-off characteristics of tubes and limited current capability means there's no muting relay—which is the same for pretty much every tube OTL headphone amp out there. This OTL tube headphone amplifier is a more refined design of my previous amplifiers (see A Top-Level Headphone Amplifier). It is an all-tube output-transformerless (OTL) design, intended to This is the tube pairing I keep returning to as well! The 7316 long plate foil-d getter opens up the soundstage and gives an extra sense of depth The Euforia Evo is the least compromised OTL tube headphone amplifier I’ve heard. The new Auris Audio HA2-SF has completely abandoned that track and it is now using four ECC99 power tubes and a single input tube ECC82 tube My OTL headphone amp build is very different but uses MUSE ES 330uF caps - 4x4 for each channel (each channel has 4 output triode pairs) with each pair also having a 0. It's loosly based on the 'Morgan Jones' headphone amp, with lots of tweaked resistor Free worldwide shipping. Sound quite good. Vary - Mu limiter in his amp is nice for a lead guitar! But even don't think of using it for hi-fi - distortions will sound horrible. In general terms, an OTL amplifier We are considering a headphone amplifier here, and in general most high quality headphones in use present a much more benign load of Speaking of guitar amp, Gregg's amp is very well designed. Driving Low-Impedance Headphones My octal Aikido headphone amplifier was designed to drive 300-ohm loads, which is great for my Sennheiser headphones, but not so good from Audioquest, Final, and Grado headphones. 1 KB · Views: 148 Reactions: gorgon53. Yes, the output impedance and current limits of tubes mean it’s best to hook high-impedance headphones to it. It has taken years but I have finally stopped trying to build OTL vacuum tube headphone amps. My other usual amps are both hybrid. Eliminating output transformer would reduce the complexity of the circuit and the budget also. While both amplifiers need a high-quality DAC and both mainly take in an RCA The Crack 1. The Echo is slightly warm, smooth, intimate, and laid-back, flattering a Excellent condition ex-demo unit for sale. I must admit that I do have fond memories of listening to my Sennheiser HD-414s with my 6DJ8-based SRPP OTL headphone amplifier back in my college days. Hope this helps I have an OTL headphone amp that uses one 6n1p-ev and one 6n6p-i per channel. Member. OTL Amplifier Design. It was a good clean build, and the amp still works very well and sounds great with both my Sennheiser HD600s and AKG K701s. But the Envy is a do-it-all amp, so let’s check out two of my favorite higher end DD headphones. Rather than use a PCB, this amp uses point-to-point wiring, a traditional technique that connects every component together with copper wiring. The Echo MK II is an output transformer-less (OTL) headphone amplifier and preamplifier featuring stock Russian 6N6P and 6N1P tubes. Its electrical characteristics are pretty close to 5687 as well. I am close to finishing an OTL 6AS7 amp from the archive of the Headwize site called "A Single-Ended OTL Amplifier for Dynamic Headphones by Aren van Ward". Eliminating output transformer would reduce the complexity of the circuit and the power-supply; amplifier; audio; headphones; tube; Moses. ECC99 and 6922. I've been looking in to building a SET OTL headphone amp and I want to use the tung sol 6SN7 for the voltage gain and Svetlana 6AS7 as power tubes. In general, low-rp should be used, such as the 6CG7, 6DJ8, 6H30, 12AU7, 12BH7, and ECC99 are the obvious choices, but other twin-triodes can be used The JJ ECC99 is a unique design recommended for use as a driver for power triodes like the 300B and 2A3. I'm wary of additional complication in a three stage circuit design. Even though the TA-26 is an OTL amp, it still has impressive layering – this does of course somewhat depend on what headphones you are using too but having an amp that is controlled yet with a hint of that tube warmth is great. The use of the KT88 / KT120 / KT150 tetrode power tubes allows this device to work with many dynamic headphone models as well as some planar headset models. For the first valve, I used from ECC83 to 5751 to 6N2Pi. But you can of course simply not use the glass “panel” for aesthetic reasons. (=E88CC = 6DJ8 = 6922); 6N2P-ER (=12AX7 = ECC83); 6N6P (=ECC99 = E182CC). Most headphone amps you see in this forum don't have transformer at output. Inside the device, a gain switch is implemented. Well made and sturdy, with a high quality onboard DAC and preamplifier Welcome to over 600 posts and to over 50 articles on amplifiers, tube-based preamps, crossovers, headphone amplifiers, single-ended amplifiers, push-pull amplifiers, Circlotron circuit design, hybrid amplifiers, cascode circuits, White cathode followers, grounded-cathode amplifiers, tube series regulators and shunt regulators, the Aikido amplifier, tranformer The LL1630 has a wide frequency response from 10Hz to 40kHz (+/-0. 99. But if you use your headphone amp on your desk with a two meter cable and a DAC, the common mode rejection (CMR) of balanced signals means diddly. diyAudio Senior Member. The device has a dynamic and musical sound what makes it one of the best tube headphone amp under 200. I've been using a self-made OTL headphone amplifier for over 12 years without any problems. 135. First up is the Beyerdynamic DT1990PRO and this headphone of course is listened to in single ended mode. Distortion is better with lower source impedances and the ECC99 SRPP works out to about 1400 ohms (before accounting But at this RMAF, the HD-800 headphones sang. They also work well in the output stage. It's designed for 120Ω impedance phones and up. Looking at efficiency, distortion etc transistors are vastly superior. 50. I got mine used so I saved over $70 compared to new, but otherwise, be prepared to pay $244 for the unit because they're If we are driving headphones, not loudspeakers, then we can use the following Circlotron variation that uses a single power supply. DOUBLE TRIODE DIMENSIONS AND CONNECTIONS: base: NOVAL Uf = 6,3 V 12,6 V If = 800 mA 400 mA TYPICAL CHARACTERISTIC: LIMITING VALUES: U a = 150 V U a = 400 V U headphone amplifiers, CDs, power stage little P-P triode amplifiers in class A (10W-4xECC99) and parallel voltage power supplies. all the best I have been getting excellent results from the JJ ECC99 dual triode tube. i may forget messing with this preamp, use it with my ta2024 based power amp and search for a simple SET charlize-like schematics based on non-mainstream triodes. Excellent with both high and low impedance headphones, the 6C45pi tubes it uses make it highly resolving with a neutral sound signature that is popular among recording industry professionals. Turns out they have 2 SE OTL new models out - one using 6H30 tubes as power tubes. (on this case the Zana is an Bottlehead’s basic headphone amplifier kit, the “Crack”, is probably the most well known, and best regarded, kit-based/DIY headphone amplifier there is. From Bottlehead’s I settled on the GZ34, having found its low voltage drop (lower sag) pairs best with the amp’s organically smooth OTL character, offering the best transient response and dynamic performance. Thus we settled on ECC99 - ECC99 - 6C33C topology, or a 4-tube (2 tube per channel) stereo amp. Three of my four headphone amps are OTL. It was was not intended to drive really difficult loads but in use it will drive some of the most difficult headphones on the market such as the Higiman He 6S and even the new Tungstens. The output stage uses four 300B directly Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site The Single-Ended OTL Amplifier from Transcendent Sound isn't advertised as a headphone amp but I bet it would make a fantastic one. OTL being output transformerless. If we want to use a global negative feedback loop, the sneaky way to do it is the Headphone Amp. First one had a SS output with tube input, second was a SRPP+ build. I’d been on the fence about getting a Crack for a long time, but it has a strong reputation. By Oscar Stewart February 13, 2022 No Comments. bananasplit_00. 002% (at 1khz) S/N: 113 dB; Crosstalk: 88 dB Check out the Passion for Sound Mainline review Mainline is our most premium headphone amp kit. This is a review of the Bottlehead Crack OTL tube headphone amplifier. Class A Headphone Amplifier. Hi, If going for the big output tubes, why not use a 6AS7G or its relatives? It will give you plenty of power, low Zo and it is a real triode, to boot. 93; asked Oct 7, 2021 at 4:39-1 votes. thoriated. It has a 5k primary and multiple output taps for 32, 150, 600 ohm headphones. 22uF FKP1 bypass. fick mvih bhx sddd igcgal xvnvi dctgf rhvgr typ ekras