Headphone Amplification

What is the general consensus on running the Headamp Pico as a preamp in a system?

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…

http://cls.audiogon.com/cgi-bin/cls.pl?preatube&1192058776 I'm not sure what it is, or what tubes those are...but it does look funky enough to be a "collector's" amp.

Couldn't find based on a couple searches, but admittedly didn't exhaustively search. So if some kind soul can put away a shovel and answer me this, it'd be much appreciated. I sold off a brielfy-used Stax SRM-007t II when I got JP#'s exStatA. I had no issues with the volume controls, and L/R trackign was fine. Buyer doesn't have phones yet, nor someone near him with phones to borrow. But he noticed that the L/R volume controls behave differently. One rotates nearly 360 degrees ("normal"), but the other goes around and around. No mention of catches or clicks.....I also need to get clarification on which does what.... But wanted to throw this out here. Can s…

Has anyone heard or experience reliability issues with any of these amps. I saw a reference on StereoWOW about the 717 having issues. StereoWOW

Just because my turntable only has one headphone out, this prevents me from having to pull cables every time I want to listen to a different amp. Does a preamp actually do anything to a signal, or is it just a fancy switchbox? This has always confused me.

I kid you not: http://www.monoprice.com/Product?c_id=120&cp_id=12008&cs_id=1200801&p_id=11567&seq=1&format=2 Looks like a candidate for the Inner Fidelity test bench.

Jack is now offering custom made aluminum feet with silicone rubber inserts for your WA6. I paid $25, shipping included.. I think they look awesome

I have an audio itch that needs scratching! So I have been looking for an inexpensive balanced DAC with a balanced amp built in. I found the Audio-GD for $500 plus $71 S&H and although most may have not listened to this unit I would appreciate if "on paper" the claims by Audio-GD are sound and make sense. http://www.audio-gd....1/NFB10.1EN.htm If you all have a potentially better alternative I would appreciate hearing about it. Cost is a major issue, I would "feed the monkey" by selling a few items. Thanks.

I have a 100V SRM 323A that I am trying to rewire for 120V. I haven't been able to find a diagram for the transformer, so I was hoping that someone could help me figure out how to rewire it. Right now the yellow, white, and grey wires are connected to one side of the plug and the brown and green wires are connected to the other. The blue and orange wires have been cut off, but I should be able to reconnect them with some careful soldering.

Hi, I'm asking for help because I can't understand ... so i installed in my 006 two tung-sol 6sn7gtb tubes (American NOS)with about 250 hrs on them (so out burn-in but new), I replaced the adjustment trimmers with multiturns to have more control, I use a ceramic screwdriver, my mains voltage is 220Vac constant, I let the amp warm up for at least an hour (with signal on and volume at about 2) before calibrating, put the volume to zero and select an input with no signal (the 1, which is connected only the 3). .. tester in Vdc...first I adjust the balance or then the offset, then balance again and then offset...then I switch to the other channel now this happens to …

http://www.head-fi.org/forums/4233707-post19.html I've seen this for nth time, how true is this statement?

Hi all, I am hoping you can get me back on the right track in the world of Stax. A while ago I bought from Japan an SRD-7 mk2, a SRM-T1S, a Lambda SR Pro and a Lambda SR Signature Pro headset. The SRD-7 was bought just as an experiment, I did not really expect much from it. Besides I had read that the SRM-T1S should be better. However, from day one I have felt that the SRD7 mk2, coupled to a Pioneer M-22 power amp and a Pioneer C-21 preamp sounds much fuller/dynamic/better lower end compared to the SRM-T1S. The SRM-T1S seems flat or lifeless in comparison. I was sure there was something wrong with it, it is an old amp after all. I tried biasing to no effect. …

This looks interesting...

details -> scheme -> psu -> >Max output voltage: 280Vrms It doesn't seem like a very powerful thing. What do you think?

I have a CCS modded Stax SR-006t from Mjolnir Audio that stopped working back in September. For a few weeks I would get no sound until I turned it off and on, but now I get nothing. I've tried multiple sources and cables but no dice. I tested the DC offset between + and - of both channels and between the bias and both channels' - line. After that I tested the AC voltage playing a 1khz signal and followed it from the inputs to the vol control and got nothing. Spritzer repaired it back in April of 2023. The HV- line wasn't working due to a failed resistor and a capacitor was starting to fail. At the time the left channel was much quieter and had a buzzing noise before …

I was reading a lively thread on HF (something about rudi and a new amp) and realized that my knowledge of measurements and most things to do with engineering is sorely lacking. I was wondering if anyone had any suggestions about learning about the engineering aspects of amps,etc (ie good design). I am mainly looking for a basic understanding to become a better consumer (or be less of an idiot). Any help would be greatly appreciated. Thanks

They look pretty neat. Here is a link to the site in Japanese, but it shows a bunch of pics: [url=http://www.soundhouse.co.jp/shop/SearchList.asp?i_type=m&s_maker_cd=1617]IZO

link Disappointed in the lack of 1x, but I have to admit, I like the price point. It's within what I can recommend to muggles, I would just like to know if it's any good, first.

https://estatron.com/collections/all Somebody who studied Head Case is now building and selling a 'stat energizer. Kind of interesting because it's only $160. Worth it?

Let me first begin by describing my background. I'm no audiophile, in fact I never had a CD player or even a casette player when I was a bit younger. It wasn't until a few years ago that I bought my first mp3 player. I went through a bunch of very low end headphones, most were only suitable for very casual listening and more PC gaming, and nothing more. Recently I decided to treat myself, took a risk and bought the HD555s. For the price I got them for, they sound excellent. Better than anything else I've owned or have tried in recent memory. But I can't help that I'm not getting the most out of them. Right now I'm running a PC with the original Audigy 1 soundca…

Is this true? Has anyone opened up the HPA-1? And are there schematics for the HPA-1? Danke

Correct me if I'm wrong, but there's no such thing as a new production JAN tube, yes?

I've just purchased a Pro-ject Headbox II SE Headphone amp and there appears to be a dearth of information and reviews about it. It is being used with a pair of Grado SR325i headphones, my source is a Sony SCD-XB940QS SACD/CD player via a Sony TAFE940QS amplfier (Tape loop)and a Van Den Hul Thunderline Interconnect. I'm delighted with this particular combination but I'm just wondering what other more informed people rated the setup-particularly the amp?