1. Apos Audio

    Introducing the xDuoo TA-66 OTL Tube Amplifier - Now Available on Apos Audio

    Hi all, We’re thrilled to introduce the xDuoo TA-66, an OTL headphone tube amp that merges classic engineering with the convenience of modern components. Rather than use a PCB, this amp uses point-to-point wiring, a traditional technique that connects every component together with copper...
  2. M

    Best practices when using OTL tube amps?

    First time poster here. I recently purchased an entry-level OTL tube amp (an Xduoo TA-26s) along with some upgraded tubes, and I'm looking forward to giving them a try. I'm having some trouble, however, finding clear answers to some basic questions regarding "best practices" when using an OTL...
  3. D

    HD 800 (modded) vs HD800S

    Hi all, I know this question has been asked throughout the years but I'm wondering what I should do. I'm contemplating one of these headphones and I'm not sure which one to go for. A year or so ago I posted on here taking you through my journey on which headphones to buy, I mentioned liking a...
  4. Decware ZMF Reference OTL

    Decware ZMF Reference OTL

    SPECIFICATIONS Amlifier design Output transformerless (OTL) Single ended Tubes 1 x Input/Gain tube: 6N1P (6Н1П). Also compatible with: 6DJ8 (ECC88), 6922 (E88CC), 6BQ7A (ECC180), 6N5P (6Н5П), 7DJ8 (PCC88), 7ES8 (PCC189) 2 x Output/Driver tubes: 6N6P (6Н6П) 1 x Rectier: 5AR4 (GZ34), 274B...
  5. Monsterzero

    The (Un)Official Amp Thread For ZMF Headphones

    We've been tossing this idea around for awhile, so I thought I'd go ahead and get it started. If you're looking for amp recommendations for your new ( or not so new) ZMF, this is the place. Kindly add photos of your tube, tube hybrid or solid state amps, comments, questions, recommendations...
  6. ostewart

    WBA - White Bird Amplification - Thread

    I've seen WBA mentioned a few times, with a couple of product specific threads but no general WBA discussion in here. This is a thread for owners to come and share their experiences with the company and their amps. WBA make a few different amps, pre-amps and headphone amps...
  7. dragonball

    Best 300$ DAC for Sennheiser HD650 and OTL Tube Amp?

    In today's times, which DAC will be best in terms of Sound Quality for HD650 + OTL tube amp (Eg. Bottlehead Crack) ? I dont need MQA, balanced inputs, etc. Thank you
  8. donpablo

    What are your favourite headphones for your OTL amp?

    Hello, I have two main amps currently, Flux Lab FA12 solid state, and SinusAudio OTL on OTL 6N13S and ECC82 (12AU7). They both nicely fullfill eachother. However I dont have higher impedance headphones that are most often suggested for OTL amps. Currently I mostly use Aeon 2C and AudioTechnica...
  9. Konka Novalis electrostatic amp

    Konka Novalis electrostatic amp

    Suitable for all Stax Pro series headphones (earspeakers). This is an OTL (Output Transformer less) tube amplifier, Class A. Balance adjustment to compensate earspeakers ageing caused imbalance. With two simultaneos outputs for Stax Pro Bias earspeakers. Amplifier has an extra RCA-output for...
  10. 1101 Audio Blue Halo OTL Tube Headphone Amplifier

    1101 Audio Blue Halo OTL Tube Headphone Amplifier

    BLUE HALO is a dedicated amp for high impedance headphones such as the Sennheiser HD600/650/800, ZMF Verite/Verite C, Beyerdynamic, etc. (anything with 200+ ohm impedance). It's a design that eliminates the need for 6AS7/6080/5998 power tubes for output power. It has two 6J5 sockets and a 6SN7...
  11. Grado Diesel

    OTL: Darkvoice 336SE or Bottlehead Crack

    Just saw Drop(Massdrop) has the Darkvoice 336SE for $200 right now. Is it worth jumping on one of those or building a Bottlehead Crack? I own a pair of Sennheiser HD-6XX and have been driving them with a Shiit Vali2 with 6SN7GT Tung-Sol mouse ears and have been in hog heaven. But I’ve been...
  12. D

    Darkvoice 336SE alternatives and a "medical" question

    My DV 336SE is strange. After it gets hot (20-30 mins) it causes my lungs and throat to get sore. I know it sounds funny, but it isn't as it must be evaporating something that irritates my breathing (based on my research I guess it might be epoxy resin). I have a question - did anybody else...
  13. ostewart

    Feliks Audio Echo (new budget OTL amp)

    Looks like Feliks Audio haven't forgotten about those on a tighter budget. http://www.feliksaudio.pl/ Launching echo Available for Preorder Many of you asked for a more affordable headphone amplifier. One that would still deliver stunning sound fidelity and don't compromise build quality...
  14. Feliks Audio Espressivo MKII

    Feliks Audio Espressivo MKII

    After several successful years on the market, we decided to refresh our entry level amplifier by optimising its electric circuit matched with upgraded 6N30 power tubes and 6922 drivers. Technical Specification - Model 2018 Input Impedance: 100 kOhm Frequency response: 15 Hz - 45 Khz +/- 3 dB...
  15. Renato Fury

    Schiit Valhalla 2 vs Solid State.

    Valhalla 2 is an OTL that has a neutral and precise signature as described on the site, but then what is the advantage of te-lo since it does not offer that "tubey" sound that some people love, which makes a Solid state amplifier does not do in terms of sound?