The amp has been in my private audio collection since 2016 and is in emasculate condition. I upgraded all its tubes including the rectifier tube to Woo’s Sophia Princess. The amp comes with the original tubes as well and all original boxes and packing. The amp and tubes will be shipped in two separate boxes. Ken Rockwell’s review of Woo’s WA6-SE Anyone who has spent time with the headphone community has undoubtedly crossed paths with Woo Audio at some point. Jack Wu has been producing quality amplifier pieces on both the loudspeaker and personal audio front for some time now. His prolific headphone amplifiers have really grown into an amazing product line, catering to the entry level as well as soaring into the high-end stratosphere with his exceptionally unique monoblock WA234 (~$15k). Yes, that’s right — monoblock amplifiers for headphones. The good news is that Woo has a well conceived product trench dug out, leading up to the big guns, so anyone willing and able to dip their toe into the fidelity water can have at it without sacrificing and arm and a leg (or an ear). I’m not referring to an audiophile “budget” piece north of four figures either. A newcomer can dive into the Woo pool for about $520 with the single ended OTL WA3. The spotlight of this review rests on the product that lands at the pseudo-median of this line. The WA6-SE ($1.2k) is a SET Class A transformer coupled headphone amplifier that pushes a few extra watts over the “regular” WA6 and also includes a separate power supply housed in its own casing. Unlike many of the tube-injected hybrid amps that head-fi manufactures have been introducing in greater numbers the past couple of years, the WA6-SE is of an all-tube design that incorporates a separate, upgradeable rectifier tube section. The construction and quality of the Woo product line is absolutely first rate. Countless reviews have been written heralding his relentless attention to detail. The build of the WA6-SE is what you would expect from any grand audiophile product, even at pricepoints far exceeding its own. It is sturdy, well-designed and exceptionally heavy although its size is still surprisingly manageable. Computer desktop warriors take note. The overall look and recessed branding manages to be both classy and sexy at the same time: it’s a looker. Throw the warm glow of some shapely tubes on top of that and you can easily see one of the reasons why the old school technology has stood its ground against the imperialistic march of solid-state amplification. The well-machined casing leaves you with the feeling that it would suffice as cannon ammunition as well as it plays music. The power supply and drive tube sections are connected via a supplied “umbilical” power cord and bear a resemblance to the [CanJam design reviewed here]. When it comes to transporting the unit, a few owners I have spoken to have expressed a bias towards the ease of the one-piece units, like Jack’s WA22. While transportation might involve a small additional step, I didn’t notice any conclusive drawbacks to this separatist arrangement, both setup and use were as simple as you would expect. At the end of the day, I am fully impressed with the shell that encompasses the innards of this beauty of an amp. It is truly built like a tank and would be a welcome visual complement to any audiophile’s headphone rig. The back of the unit includes two single ended analog inputs. The RCA connectors look and feel a step up from your usual stock part fare. The input selector switch is located in between the two inputs on the rear panel of the drive tube section, a unique variation on the usual front-facing implementation. The front of the WA6-SE features a single on/off rotating aluminum knob on the power supply and separate high and low single-ended headphone jacks on the drive tube case. I discovered that I favored the low jack when listening to the Audeze LCD-3 planar magnetic headphone. Power with the WA6-SE is quite ample. Even when utilizing the low jack, the amplifier had no problems pushing the 300-ohm Sennheiser HD 650s to extreme levels, normal listening volumes came in around a respectable 10 o’clock. As I was running the Woo through the paces, I noticed something I’d never heard before from a headphone amplifier. With no headphones plugged in and the volume knob up near its maximum, I could actually hear music bleeding out from the amp itself. As with almost all tube headphone amplifiers I reviewed, a slight hum was detectable through headphones on the low impedance extreme, in this case the 18-ohm Sennheiser Momentums. All nit-picking aside, I found the both the 650 and Momentum to pair quite nicely with the WA6-SE. Playback through the HD650 exuded an openness and top end air that was palpable. If you are a fan of Sennheiser headphones, the WA6-SE is worth an audition. The Woo continued to impress with the closed-back Momentums. The pairing presented itself with a liveliness and satisfying fullness that pushed the $300 headphone even further from its budget roots. But the WA6-SE isn’t really about driving headphones that cost a quarter of its ticket value. The more revealing Audeze LCD-3 added some additional perspective to the listening party. The new DAC2 D by Benchmark offers a solid DAC and headphone amplifier combination. Running the single-ended output into the WA6-SE begged for a direct comparison against the almost “0 Ohm” headphone amp built into the DAC2 D. The resulting Benchmark output is precise, almost to a fault. And in turn the Woo felt a little less dry in the vocal region by comparison. Listening to Diana Krall’s Glad Rag Doll, the WA6-SE presented wider than average soundstage. While the overall perceived articulation of the midrange was perhaps slightly less, the Woo rang true with a more pleasing sense of tonality. Like a good steak, the midband was both juicy and thick. It leaves you with a sense of vocal fullness, but not without perhaps a hint of color as well. The 24/96 track Lucia by Marta Gomez felt as if the vocals were a bit less biting as airflow passed though Marta’s windpipe as she sang. This subtle smooth texture was further complemented by a believable sense of air and space surrounding her performance. The overall reproduction of the 6SE is flat and neutral as any good amplifier should be. The low end didn’t reproduce any unruly anomalies, and tightness and texture are both on par with other amps at this price range. The second half of the Nine Inch Nails track “Ringfinger” from the early album Pretty Hate Machine features a slight change in direction around the 4:07 mark that is riddled with dynamic and rhythmic bass synth sounds. During the outro, the Woo didn’t falter or hesitate with its unaltered recreation of the intricate passage. The synths darted in and out with fullness and surprising dimensionality for a virtual instrument that exists only in the dark, dusty corners of Trent’s mind. For all this low frequency vibrancy, the Benchmarks solid-state amplification did highlight perhaps the unavoidable wrinkle of the tube. So subtle it almost flew under my radar, but while listening to Metallica’s Master of Puppets I did notice a bit more bass slam and impact from Lars’ syncopated bass drum beats than from the Benchmark direct. The Woo is by no means weak in the knees when it comes to bass, but rather subject to the slightly common trait I have noticed from products on the tubular side of headphone amplification. This subtlety is not something that you would probably ever notice without a direct comparison to draw from. Orchestral and vocal-centric music will benefit greatly from the WA6-SE’s strengths. The Sophia Princess Rectifier tube is a popular upgrade to the WA6-SE. It’s double mesh screen houses a glowing “V” that is a real ocular treat to the amplifiers presentation. The tube is available as an add-on and can be purchased directly on the Woo site along with the amp. Compared to the stock 274B tube, the Princess sounded a bit more open with a wider soundstage. This slightly more enveloping sound carried a dash of vibrancy with it that made it easier to pick out individual instruments out of the mix. While this tube doesn’t come cheap ($160 on the Woo site), its addition was pleasing and is a great starting point for a tube rollers collection. Overall the Woo WA6SE packs plenty of punch tied to a tonal richness that can stand toe to toe with any headphone amplifier in its price range. It is the classic amp of its time, built with a keen eye for detail and a welcome sense of longevity that makes you think it’s one of those pieces that you could hand down to your kids. The build is in a class all its own, one that far exceeds its price bracket. The fine craftsmanship of its construct is just a window into the capabilities of its inner sonic beauty. If tubes are your thing, then Jack Wu is your man. While many of Jack’s products would be a great addition to any audiophiles collection the WA6-SE will strike a sweet spot in the price to performance balance for many. Its power output is as impressive as its aesthetics.

Woo Audio WA6 Gen 2 - SET Tube Amp for Headphones Includes upgraded NOS tubes 13EM7 (with adaptor so they fit the amps sockets). Also included are the stock tubes, including original 13DE7s, which also sound pretty good, but are somewhat brighter. This is a terrific sounding tube headphone amp for both high and low impedance headphones -- Ive even run planar magnetics off this thing. Smooth excellent sound. The amp retails for $1000 and upgrade tubes for $220 a pair. I have owned this amp for about 1.5 years -- in excellent condition and functions perfectly.

Normal 0 21 false false false BG X-NONE X-NONE For sale is a Woo Audio WA11 Topaz Portable Headphone Amplifier / DAC incl. WA11 Unity Smart Case. The WA11 Topaz is a battery-powered, fully-balanced headphone amplifier and DAC running in a Class-A topology. It is capable of driving the most demanding full-size headphones (e.g. Abyss Diana, HiFiMan Susvara etc.) while maintaining an ultra-low noise floor for reference in-ear monitors. The DAC is an ESS Sabre that can decode PCM up to 24-bit/384kHz and up to DSD128. In few words, an immensely powerful portable unit, that can rival any all-in-one desktop alternative. The WA11 that Im selling is in excellent working and good visual condition, with some marks visible on the photos. Comes with a sleeve, charger, USB-A to USB-C cable, short USB-C to USB-C OTG cable and a WA11 Unity Smart Case. Please note – the case doesn’t include the custom headphone case part and has some marks on its bottom side (due to a non-supported phone being glued to it), but is extremely robust and fully functional. Original box is not present, but Ill pack everything extremely well. From a pet free, non smoking home. Will dispatch the unit tracked and fully insured either the same, or the next working day. Economy (via GLS) and Standard shipping (via DHL) usually takes about a week, while Express delivery (via UPS air) arrives in 2-3 business days (please dont pay attention to eBay estimates - they are assigned automatically and theres no way to edit them). In some cases, standard or even air service might actually be cheaper than the economy one, so do pay attention at checkout. Condition and serial number are documented and recorded, so scammers - dont waste your time here. Please purchase only if you have 10+ feedback, or contact me prior placing your order. All of my perfect eBay feedback comes from selling expensive headphone gear, so buy with absolute confidence!Feel free to check my other listings as well. And last but not least, thanks for looking!

This Woo Audio Eclipse WA8 was purchased to replace the Woo FIreFly headphone amp/dac that I used with my home studio. I never used it for its portability. It was a standalone unit connected to a MacBook Pro using Roon to play through first ADAM AX-7 powered studio monitors and then ELAC Navis B-51powered music speakers over thier proprietary BlueTooth Wireless Transmitter. Im now running Roon through a United Audio Apollo twin/x interface through Barefoot powered studio monitors. The Eclipse looks like new and is wonderful amp/dac combo. I particularly appreciate that the electronics run off of the battery making for a secure/known source of power. I live in an old house and the power can be quite a nuisance at times. The unit charges the battery as it plays while plugged in, negating any chance of battery drainage. Ive had this a number of years without any problems. I dont have the original box anymore. What is for sale is the unit, charger and custom carrying box. US Sales and Shipping Only

Woo Audio WA7/WA7 TP (1st Generation) with extra tubes. Mint Minus Condition. Amp was used sparingly. Tubes have less than 25 hours on them. Coms with extra set of 6C45 Reflektor tubes. Includes polishing cloth, original boxes & packing. Great Sounding Amp! Nonsmoking home. Any questions, please ask - thanks for looking

Woo Audio Phantom DAC Cable w/ Hard Case ~ Hi-Fi Listening Simplified !! This is a Woo Audio Phantom DAC that Connects to your Phone to Play through your Home Stereo or Amp. This is the 3 Meter Long Version and has XLRs to Hook up to your Amp. It has a USB C Adaptor Included $500.00 New Retail at Woo Audio

Woo Audio Phantom DAC Cable w/ Hard Case ~ Hi-Fi Listening Simplified !! This is a Woo Audio Phantom DAC that Connects to your Phone to Play through your Home Stereo or Amp. This is the 3 Meter Long Version and has XLRs to Hook up to your Amp. It has a USB C Adaptor Included $500.00 New Retail at Woo Audio

The WOO AUDIO WA7 Fireflies Amplifier Series 3 is an exceptional audio device for any music lover. Crafted by the renowned brand WOO AUDIO, this amplifier/preamp is a top-of-the-line product that promises to deliver high-quality sound. The model WA7 is made in the United States and comes with a set of unique features that will elevate your music-listening experience. Whether youre watching TV, playing video games, or simply enjoying your favorite tunes, the WOO AUDIO WA7 Fireflies Amplifier Series 3 will provide you with a powerful and immersive audio experience. Its sleek design and advanced technology make it a must-have device for any home audio setup.

This is a must have! It comes with a free DAC for it that usually run around $100! The Free DAC does not have a power supply. It has been barely used and is in excellent condition. if you have any questions about it feel free to reach out and I will get back to you ASAP.

This is a must have! It comes with a free DAC for it that usually run around $100! The Free DAC does not have a power supply. It has been barely used and is in excellent condition. if you have any questions about it feel free to reach out and I will get back to you ASAP.

Great amp for someone who doesnt mind some patina and wear, and only cares about great sound! Heavily sun-faded on mostly the left side, right side is largely black still. The volume pot is bent a bit off axis. Sounds great, this amp is just far too large and overkill for my needs. Includes pictured tubes, unknown if they are the original or not. Includes wall power cable, and power passthrough cable, no audio cables. Will be packaged securely with bubblewrap, styrofoam, heavy duty box, etc.

Normal 0 21 false false false BG X-NONE X-NONE For sale is a Woo Audio WA11 Topaz Portable Headphone Amplifier / DAC incl. WA11 Unity Smart Case. The WA11 Topaz is a battery-powered, fully-balanced headphone amplifier and DAC running in a Class-A topology. It is capable of driving the most demanding full-size headphones (e.g. Abyss Diana, HiFiMan Susvara etc.) while maintaining an ultra-low noise floor for reference in-ear monitors. The DAC is an ESS Sabre that can decode PCM up to 24-bit/384kHz and up to DSD128. In few words, an immensely powerful portable unit, that can rival any all-in-one desktop alternative. The WA11 that Im selling is in excellent working and good visual condition, with some marks visible on the photos. Comes with a sleeve, charger, USB-A to USB-C cable, short USB-C to USB-C OTG cable and a WA11 Unity Smart Case. Please note – the case doesn’t include the custom headphone case part and has some marks on its bottom side (due to a non-supported phone being glued to it), but is extremely robust and fully functional. Original box is not present, but Ill pack everything extremely well. From a pet free, non smoking home. Will dispatch the unit tracked and fully insured either the same, or the next working day. Economy (via GLS) and Standard shipping (via DHL) usually takes about a week, while Express delivery (via UPS air) arrives in 2-3 business days (please dont pay attention to eBay estimates - they are assigned automatically and theres no way to edit them). In some cases, standard or even air service might actually be cheaper than the economy one, so do pay attention at checkout. Condition and serial number are documented and recorded, so scammers - dont waste your time here. Please purchase only if you have 10+ feedback, or contact me prior placing your order. All of my perfect eBay feedback comes from selling expensive headphone gear, so buy with absolute confidence!Feel free to check my other listings as well. And last but not least, thanks for looking!

Picked this up about a month ago but I decided to go another way. Neat little amp, very compact but with a surprising amount of power. SET tube amp so it will work with anything from planars to high impedance dynamics. It’s very obviously a tube amp, but it’s surprisingly detailed, warm leaning but not overly soft. Previous owner made some upgrades to this one: Miflex Coupling Caps, TKD Volume Pot, and a change of the power LED to match the glow of the tubes. Comes with 2 excellent sets of driver tubes as well as the stock rectifier. Westinghouse 6DR7 International 6DR7 Shuguang Rectifier Shipped in the original box.

Normal 0 21 false false false BG X-NONE X-NONE For sale is a Woo Audio WA11 Topaz Portable Headphone Amplifier / DAC incl. WA11 Unity Smart Case. The WA11 Topaz is a battery-powered, fully-balanced headphone amplifier and DAC running in a Class-A topology. It is capable of driving the most demanding full-size headphones (e.g. Abyss Diana, HiFiMan Susvara etc.) while maintaining an ultra-low noise floor for reference in-ear monitors. The DAC is an ESS Sabre that can decode PCM up to 24-bit/384kHz and up to DSD128. In few words, an immensely powerful portable unit, that can rival any all-in-one desktop alternative. The WA11 that Im selling is in excellent working and good visual condition, with some marks visible on the photos. Comes with a sleeve, charger, USB-A to USB-C cable, short USB-C to USB-C OTG cable and a WA11 Unity Smart Case. Please note – the case doesn’t include the custom headphone case part and has some marks on its bottom side (due to a non-supported phone being glued to it), but is extremely robust and fully functional. Original box is not present, but Ill pack everything extremely well. From a pet free, non smoking home. Will dispatch the unit tracked and fully insured either the same, or the next working day. Economy (via GLS) and standard (via DHL ground) shipping usually takes about a week, while Express delivery via DHL (air shipping) arrives in 1-2 business days (please dont pay attention to eBay estimates - they are assigned automatically and theres no way to edit them). In some cases, standard service might actually be cheaper than the economy one, so do pay attention at checkout. Condition and serial number are documented and recorded, so scammers - dont waste your time here. Please purchase only if you have 10+ feedback, or contact me prior placing your order. All of my perfect eBay feedback comes from selling expensive headphone gear, so buy with absolute confidence!Feel free to check my other listings as well. And last but not least, thanks for looking!

Im selling my Woo Audio WA6 SE (1rt gen.) in excellent condition with Woo audio adapter for power tubes and all the tubes I have for this amp, plus a rca cable to connect it to other sources.This is the list of the tubes it comes with:Rectifier-Psvane 274B T-II-RCA 5U4G (NOS)-Electron Tube 274B (stock tube)-Mullard GZ32 (NOS)-Mullard GZ34 Brown base (NOS)-Brimar 5Z4G (NOS)Power-Sylvania 6DE7-Sylvania 6CY7-Sylvania 6EM7 (NOS)-GE 6FD7 (NOS)-RCA 6EW7-RCA 6DN7 (NOS)Everything works perfectly, only note the adapter says 13EM7>13DE7 but they works the same for 6EM7>6DE7Any question let me know.Check my other lists

You’re purchasing / bidding on the item in the title! It seemed that these were plentiful at the beginning of summer and now supply has dried up! Notice the missing knob but actually doesnt detract from its functionality and looks. Over the next month or two, I’ll be listing some nice quality watches, high end headphones and amplifiers. This is not part of my regular listings since I post 90% sports cards and memorabilia under my account. The watches and audio equipment collection are from a MILITARY VETERAN AND CURRENTLY A PRIEST who I consider a friend. His collection was mostly purchased while he spent his time serving our country overseas. As a priest, he does not have the disposable income or time to be able to post these items for sale nor does he have the space to store his collection in his humble living area. This person is very meticulous and “A” type so many of his items were kept in original boxes. Please review any and all pictures for the quality and condition of each item, but if you need more information or pictures; please request through the eBay messaging portal. Also if youre interested in purchasing more than one item, I can combine S&H to try save some money; everything will be based upon weight and designation. Good luck and thanks in advance!!! Disclaimer for AMPS: If unit requires tubes, I dont know how long the tubes have been in storage or last used. Every amp being sold should have tubes included and will be packed with extra care. Please be aware that you may have to replace one or all tubes.

Normal 0 21 false false false BG X-NONE X-NONE For sale is a Woo Audio WA11 Topaz Portable Headphone Amplifier / DAC incl. WA11 Unity Smart Case. The WA11 Topaz is a battery-powered, fully-balanced headphone amplifier and DAC running in a Class-A topology. It is capable of driving the most demanding full-size headphones (e.g. Abyss Diana, HiFiMan Susvara etc.) while maintaining an ultra-low noise floor for reference in-ear monitors. The DAC is an ESS Sabre that can decode PCM up to 24-bit/384kHz and up to DSD128. In few words, an immensely powerful portable unit, that can rival any all-in-one desktop alternative. The WA11 that Im selling is in excellent working and good visual condition, with some marks visible on the photos. Comes with a sleeve, charger, USB-A to USB-C cable, short USB-C to USB-C OTG cable and a WA11 Unity Smart Case. Please note – the case doesn’t include the custom headphone case part and has some marks on its bottom side (due to a non-supported phone being glued to it), but is extremely robust and fully functional. Original box is not present, but Ill pack everything extremely well. From a pet free, non smoking home. Will dispatch the unit tracked and fully insured either the same, or the next working day. Economy (via GLS) and standard (via DHL ground) shipping usually takes about a week, while Express delivery via DHL (air shipping) arrives in 1-2 business days (please dont pay attention to eBay estimates - they are assigned automatically and theres no way to edit them). In some cases, standard service might actually be cheaper than the economy one, so do pay attention at checkout. Condition and serial number are documented and recorded, so scammers - dont waste your time here. Please purchase only if you have 10+ feedback, or contact me prior placing your order. All of my perfect eBay feedback comes from selling expensive headphone gear, so buy with absolute confidence!Feel free to check my other listings as well. And last but not least, thanks for looking!

This Woo Audio WA6 has some seriously upgraded tubes. The big rectifier tube is substituted with a Sophia Electric 27B (long grid) tube, which is known as a very sweet sounding tube. The smaller tubes are very rare Raytheon EM7/15EA7 tubes with tube adapters. I did a lot of research to select these tubes. This headphone amp with these tubes sounds magnificent. I am a hobbyist, and I am building a headphone amp that I will be replacing this with. These tube upgrades cost me over $300, and they have been used very little. I am a perfectionist. I baby my equipment. I promise that the unit is cosmetically 100% perfect. Any imperfections in the, sorry, lousy photos, are glare. Yow will be getting a barely used amp with the tube upgrades for less than the price of the amp alone. Free shipping is continental US only.

6SN7GTB GE tubes. Tested good & strong on my Hickok 539 Calibrated tester as shown in Photos, Reject is 1640 Mu. Matched Set of 4. From a collection of a Big Time Radio / Tube collector. Check other auctions for radio tubes from the collection of this Big Time Radio Mans estate! GE 8

Very Nice Set of 6SN7GTB RCA Tubes. For that BIG Vintage Sound! Set of 7. Check out the rest of this collection on other auctions.

6336A GE branded, Tung-sol tubes. Set of 3. Tested on my WE Hickok KS-15750-L1 Tester as 6080. Mu results as shown in Pictures. From estate of avid radio/tube collector. Check other Auctions!

6SN7GTA GE tubes. For that BIG FAT 1950s sound. Tested good & strong on my Hickok 539 Calibrated tester as shown in Photos, Reject is 1640 Mu. Matched Set of 3. From a lifetime collection of a BIG TIME radio/tube collector. Check out other auctions for radio tubes from this radio mans estate. GE 9

Woo Audio WA22 Balanced headphone Tube Amplifier. Tubes: 6SN7 driver x 2, 6080 power x 2, 5U4G rectifier x 1Polytetrafluoroethylene (PTFE) tube socketsALPS RK27 4-channel balanced smooth potentiometerFully-balanced design, Class-APower output: up to 1.5 watts per channel @32 Ohms [recommended for power demanding headphones] Transformer-coupled, Point-to-Point wiring, Pseudo-dual power supplyPhase Splitter for use with unbalanced componentsHI / LO impedance settingXLR input x 1, RCA input x 1Dual 3-pin XLR (left and right channel), 4-pin XLR and 1/4 (6.3mm) stereo headphone outputsXLR balanced PREAMP output (<50 ohms)Anodized aluminum chassis, available in black or silverSelf-biasing with compatible tubes [chart]Dimensions: 7(H), 12(W), 10½(D) amplifier 25 lbs.Designed and assembled in New York, USAThree-year limited warranty [learn more] Highlights