Some headphone amps that I've built have had very low -but audible- levels of 60 Hz hum when the level was cranked way up. No one listens that way- with the volume at 11- unless you have VERY inefficient 'phones like HE-6 or K-100's, and with those inefficient drivers you won't hear that...

Built this amp using http://electronics-diy.com/zen-headphone-amplifier.php   Uses 1,000 uF motor run film caps for output coupling (switchable with 1,000 uF Elna Silmic II electrolytic cap for comparison), SIlmic II caps in circuit, IXYS FRED diode bridges, separate transformers / diodes /...

The  CK²III is a very nice sounding amp    

From JansZen's October 3 2015 newsletter:   We're working on headphones.  I've done enough so far on this project to know that it will be possible to make electrostatic headphones unlike any others. Aside from having JansZen electrostatic clarity, they won't need a special interface box...

http://audioxpress.com/article/Lyrus-Audio-Designs-Launches-Two-New-High-End-Planar-Magnetic-Headphones.html     Newly formed company, Lyrus Audio Designs, has announced plans to enter the high-end headphone market at the 2015 Munich High End Show, with two new technology-laden planar...

For RCA connectors and speaker connectors we have WBT, Cardas, Furutech-  to name a few.  Prices range up to over $100 for an RCA jack.   But for headphone jacks we have... Neutrik locking connectors (which I find annoying)  and there's nothing particualrly wonderful about these, except they...

See   http://abtests.org/files/headphones-72.pdf       

This is something that can REALLY grab us DIY'ers!   A counterfeit device is likely to fail, and sometimes will take with it a lot of other parts, costing money and maybe even starting a fire!   If you take a 15 cent transistor, or maybe a rejected part from a scrap bin, and re-label it...

New DAC / preamp coming from Kingwa   REFERENCE 10     no price announced as yet   Lots of inputs   I'm curious to know how it will be priced, and how it will sound.   http://www.audio-gd.com/Pro/Headphoneamp/Reference10/RE10EN.htm  

There's some discussion of these electrostatic 'phones in various threads, and reviews, but I thought it would be worthwhile to dedicate a thread to the ESP-950.     The ESP-950 doesn't get the respect it deserves, in my opinion.  It doesn't have the brand cachet of Stax -  Koss ESP-950's are...

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What I mean by "critically revealing" is, which of the headphones that you own are the most revealing in terms of allowing you to hear differences in upstream gear?  For example, with which of your headphones can you hear differences between DACs most clearly?  Amps?   While you may not be...

I've got an SRM-T1 coming (along with Lambda Signatures)   I'm wondering what mods there are for the SRM-T1   I searched "SRM-T1 mods" and I read hundreds of various STAX posts and I didn't see anything.   So, I'm curious about what mods there may be for the SRM-T1   Can someone...

I have a pair of Beyer N1000 electrostatic headphones I'd like to use on ('standard' bias) Stax amps and adapters   So, I need to either find and install a Stax 6-pin cable - but so far I have not been able to find one, all I can find are Stax 5-pin cables.   Or, I need to find the...

Saw these for sale just thought I'd mention it in case anyone here is interested.   http://www.myaudiolisting.com/classified.php?clasid=MTA1MzU=   I never heard of the site, seems an off-the-beaten-Internet-path site to me, but maybe it's actually very popular and I'm just ignorant, I...

I recently bought a pair of Beyer ET1000's and the cable is bad, got a break in the middle.  I need to replace it.   I contacted Beyer and they have no parts, no info, no nothing for this product.   Any suggestions?  ...

There WAS a  pair of Beyer N1000 Electrostatic Headphones /adapter box on eBay for all interested, these are  quality electrostatic 'phones that tend to go for low prices. Recabled or with an adapter plug they wok well on Stax electrostatic amps on "normal" polarizing voltage, would probably arc...

  Someone is selling a headphone amp chassis "kit" on eBay that includes a nice thick front panel with a recess milled out for the volume knob, comes with knob, power switch, IEC power inlet, rubber feet and so on.   Has silk-screened "VOLUME"  "POWER" and "PHONES" labels on front panel...

Someone is selling a headphone amp chassis "kit" on eBay that includes a nice thick front panel with a recess milled out for the volume knob, comes with knob, power switch, IEC power inlet, rubber feet and so on.   Has silk-screened "VOLUME"  "POWER" and "PHONES" labels on front panel. rear...

http://cgi.ebay.com/JECKLIN-FLOAT-ELECTROSTAT-PS2-HEADPHONES-BOXED-MANUAL-/200584236536?pt=UK_Consumer_VintageAudio_RL&hash=item2eb3c08df8#ht_4445wt_1049   Ebay item# 200584236536

http://semicon.njr.co.jp/eng/MUSES/MUSES8820.html   New OPA from JRC. Just wondering if anyone's heard it in their M³ or other amps using OPAs.   I wonder if there is a dedicated OPA rolling thread here on Head-Fi, I didn't find one.

See http://www.bottlehead.com/smf/index.php/topic,1477.0.html

I'm chopping off the 1/4" phone plug on my Sennheiser HD800 stock cables to go balanced. I need to know the wiring scheme of this cable - which color wire is Left (+) and which LEFT(-)  etc.   Anybody have this info?    (I would also like to know the wire color scheme for the...

I will list here all the amps I tried with my HiFiMan HE-6 planar headphones.  (I will update this over the next few days  until I have tried all the amps I can get my hands on )   These headphones want some power and so not every amp will drive them.     Dedicated Headphone Amps...

I made a little box with 2 headphone cables coming out of it with standard 1/4" phone plugs on them, a DPDT switch, and a single female headphone jack.   This allows me to directly compare 2 different amps with the flip of the switch.   The headphone cables I used are pedestrian, just...