Hi there, I just finished my one-case 2ch beta 22 and have some annoying hum on the output. Also with the volume turned down completely there's some kind of hiss. I followed AMBs wiring scheme correctly I think... The RCA-jacks have no contact to the case and are isolated from each other...

Hi there, I'd like to create my own cups for the Th X00 and so I am looking for some help. Of course I could simply measure everything, but I think there are people here that have done that before and eventually with better tools and techniques. I have access to a fearly good lathe and...

Hi there,   I built two tangent tread power supplies some years ago and used them for my jisbos buffers.   I'd like to know if they can be powered from the +/- 24V AUX-output of a B&O Icepower module?

Hi together,   I am currently building the "Transistoramp V4.0" amp designed by Andreas Rauenbuehler.   You can find the layout, partslist and circuit on the website high-amp.de (scroll down on the left for English version)     Now my problem is that the power supply is not...

Hi there,   I was wondering if it's somehow possible to make the outputs of a stat-amp swichtable?   I'd need high-voltage-resistant and 5pole switches - (or multiple switches ...)     Any idea anybody?

Hi there,   since I gave my NAD PP2 PhonoPreAmp to my father I now need a new phono-preamp.   I am looking for a solid state amp, no tubes this time.   I also do not want to spend too much money since my EHHA already becomes much more expansive than I thought. (As my DIY-Projects...

I'm about to get a kit for an EHHA rev.A and started thinking about the tubes.   I started my DIY-Career with a SOHA, later on I added the jisbos buffers. I did some tube-rolling and liked the GE 6680 best. (Not depending on the phones) (I also built a SOHA II, a Mini³, a M³ and another...

I have a strange problem with my SOHA II.   When I turn the amp on there's a relatively quiet hum in the background. That hum does not change with the volume - it stays constant.   Over several minutes ( two or three ...) it becomes louder, then a quiet hiss joins in. Then this hiss...

I am currently gathering materials for my exstata and want to integrate a bassboost. (Which will be bypass-able per switch) I am using a STAX SR303 - most of the time I really love their sound but sometimes the low end is just a little too thin. I know next to nothing about filters of...

Hi there, as always when I build something, it doesn't work right away from the start Well, I exagerate - bot sometimes it really seems so. My e12 - newly added to my M³ does not work. If I turn on power there no click, Voltage reading across the OPA pins is ~13,4Volts both (4/7) and...

Hello, I'm looking for a really noise-free amp for my TF10.pro. At the moment I'm using a AMB Mini³ (Gain2) which sounds great but generates clearly hearable noise. The amp should not be bigger than the Mini³ and sound at least as good as the Mini³. Also it should not be too expensive...

Hello, I just finished my AMB M³ and have the following problem: The DC offset between IG and OR measures ~ 5,3Volts - much to high. I already posted this over at headwize, maybe somebody here had a similar problem and could give me some advice what problem to search for - a short or...

Hello, I just finished my Mini³ and I'm going through the initial checks. But when measuring the quiescent current draw as shown on AMBs site, I get 15mA instead of 10mA. I'm kind of worried since the difference is very high. Where could the problem be? Up to that point there where...

Hello, since my SOHA is now finished (only buffers are to come ...) and university starts in about one week I need something to look forward to in my next holidays to get over the next term without going crazy Something I can brood about in the evening First of all - the Headphone Amp...

Hello, after lots of sweat and fear, I had my SOHA running perfectly and was amazed by the sound. For my test setup I used only one RCA input, connected to the board through a source selector switch. (2pin 6 positions, I do not switch ground, thats permanently connected.) Now I added...