Headphone Amplification

I tried to adjust tvr-1 and tvr-2 in srm-727, it seems tvr-1 is in 2-stage and tvr-2 is in first stage. I tried with traditional method which I was using in T1, measure R+/R- dc voltage and adjust tvr-2, measure R+ and ground then adjust tvr-1, both set to about 0 but found the amp stopped working. Then I restored to original value, the amp works again. Does any know the correct way to adjust tvr-1 and tvr-2 in SRM-727? Thanks. I also found 727 is a good paring with hifiman jade 2.

Hi, Can anyone give me a list of amps with some balanced input (I don't care if it has unbalanced input or not, but if it does, please note it)? I'm thinking about getting one of those....but not necessarily to use balanced headphones with it. Just want to use balanced sources with headphones. Thanks in advance!

I'm thinking about upgrading my headphone amp, and since I'm using my Nuforce Icon for headphones right now I might as well upgrade my speaker amp at the same time. I've heard good things about the 840A, but not much about its headphone amp. Anyone have any experience?

OK, so I have had for a long time now issues with some sort of interference in my system which manifests as a background high-pitch noise that is fatiguing after awhile. I have tried many things to assuage the problem because its source has been unknown. Thought it might just be digital harshness, the headphones, etc. Anyway, I got some bendix 2C51 from luvdunhill recently and popped them in to my SDS-XLR (gotta live with what I got ) and when music started there was an intermittent static noise in both tubes. No music, no static. I thought it might be bad tubes. Anyway, this morning, for whatever reason, I decided to cup my hand around the tube (between driver &a…

I have a set of Behringer ms16s, and I was listening to my headphones through them (Sony MDR-V6) and the headphones sounded better than ever before. Is it possible my Behringer monitors were acting like a headphone amp, boosting and enhancing the sound of my music? Cause it just sounded so good. Thanks, Eddie

in the past few days;I made some T2 PCB and start DIY. The transformer I made using the pure silver line.But the delay starts is a trouble；I don't want to use it.

I own a pair of Transcendent Sound Beasts and would like to power the H2+ with them. Will this work well without the TR2? Thanks in advance to anyone who might know.

Hello to all, I am looking for the original SRM 717 circuit diagram and could not find it with quick search - anybody can help ? Philipp

I caught this off of Ryan's review -- when did this come out?

In 2011 I bought everything needed for a D.I.Y. T2 ( except the chassis and the 4-gang attenuator or pot for level control) and had every intention of building the thing... but then I became disabled and unable to build it.... though I still fantasized that I would build it- somehow. Well, that clearly is never going to happen, and due to the situation I find myself in, I need to get the money back that I spent on these parts. I offered them to Birgir (Spritzer) but he doesn't need them; he suggested I offer them here. I have attached my T2 Bill of Materials with part numbers, prices and etc. Have a look and if you are interested, make an offer. FYI I will on…

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Thanks to HC, I've pieced together a bedroom system consisting of: - McCormack Micro Headphone Drive (MHD) - Rotel RCD971 - Etymotic ER-4s I've tired of IEMs (ie sticking things in my ear) and these old ER-4s have been sitting in my desk drawer for years - sometimes I tried to sell it, but out of laziness it just sat there tucked away. Then I acquired the RCD971 (because I was in a weird GD phase and HDCD seemed pertinent). Then I acquired the MHD, which is the key here. I remember not too long ago when I was a piss-poor student and I lusted after McCormack gear, and the MHD popped up here on HC, and I couldn't resist. It was not planned this way, but this o…

Has anyone experience with the Audio Consulting MIPA Stax Amplifier from Switzerland? Battery powerd spec as follows Product Features This is a 100% battery amplifier suitable to drive all Stax headphones Mipa power amplifier 30 w per channel , battery powered Silver Rock level transformers suitable for all Stax headphones Silver Rock TVC volume control 3 inputs Polarisation of membranes performed by batteries Price CHF 18`500.00 in Wood/oil, CHF 15`400.00 in Black Copper versions available http://www.audio-consulting.ch/?Products:Amplifier:MIPA_Stax_Amplifier

See from Tyll's recent IF post Pete & Todd are at it again. On the other side of things, sadly the Peak & Butte are no longer listed on Apex.

Can someone explain this to me using, you know, science/logic? Thanks. Oil damped tubes I am not trying this, btw.

Theres a new hybrid versions out ...would be great to get Spritzers or Kevin's view on it...https://wooaudio.com/amplifiers/3es

This is the 'new' McAlister EA-6, freshly returned from Peter, with a better than new rework of the circuit... tube compliment is: 1x 12BQ6 1x 6BQ6 2x 12AU7 4x 6CG7 4x 17GW6 This is with the Eastsound E5 and the HE60. Good news: This amp is great, if not spectacular when playing acoustic (Allison Krauss), classical, and some rock (Jane's Addiction, Who Ultimate Collection, and Hoobastank). Just superb. Bad news: On saturated and distorted rock (Tool '10k Days' and 'Lateralus', Jett 'Get Born' and 'Shine On', and even Velvet Revolver), I catch a raft of fuzzy distortion (almost static) in the upper guitar band and the top of percussion (cymbals)... BUT, ONL…

I've heard a few Zana's at the meets but the only Beta I heard was Nate's first one......... and meet conditions are, far from optimal, so what do you guys think? Thanks USG

Just read about this in SoundOnSound magazine -- another entry into the portable USB DAC/amp category. Of interest: extremely small USB-powered very simple (USB port on one end, headphone jack on the other, volume knob) company provides technology to the likes of Benchmark, et al targeted at professionals (and probably "prosumers") "seriously low" jitter figure via reclocking (1 picosecond) $400 It's that second-to-last one that caught my attention (no, Colin, I still haven't read that article you linked for me).

Wanting to know the differences between the SRM-252 Mk2, the SRM-252A and the SRM-001. Do all three uses the same amplifier circuit? I Know that the SRM-001 uses a switching supply that I assume that the table top models do not but are the circuits the same?

I suspect everyone it tired of Singlepower issues, but quick question if you don't mind. Any suggestions for eliminating hum from an Extreme Platinums preamp out? Have moved outlets, swapped variety of tubes, tested other preamps, used with headphone and speakers, to no avail. For a decent chuck of music I like the Singlepowers punch with the Emotiva RPA-2 and K1000s over other pres around the house (GS1 or Parasound P/SP 1500), but of course the slight hum is killing it. Headphone out has always been good, though the three inputs have never been able to be used simultaneously (all work, just not cables plugged into to any two at one time - goes very quiet even if only on…

So I go to case up my M^3 today, and I snap the volume pot's shaft. Yes I snapped a shaft. Dammit, so for the fuck of it I tried to epoxy that shit back into place. Game over for my RK27. Fuck. So I fire up my VanTOTL tonight, to discover my only 6AS7 has decided that about 10 hours of use was enough, and one of the triodes is dead. At least I have a backup 6080. *sigh* Amp maintenance isn't my idea of fun spending.

FS: Aristaeus - Head-Fi: Covering Headphones, Earphones and Portable Audio

I am looking for an amp and would like to go with a portable(Zen Head, Mustang, ELO Mini3, etc) but would consider a desk-top for $2-300 if the sonic advantages were there. Do RCA inputs amount to better sonics or to the guts of the units decide that fact? And do desktop units have better parts, necesarily, than portables? The desktops units i'm considering are the new Trends, and any other that are priced $2-300. thanks

Was looking over at HF and saw this: Styleaudio's Topaz and Emerald DAC/AMP Sale!! - Head-Fi: Covering Headphones, Earphones and Portable Audio :palm::palm: