Sorry, not really : better overall sound with other tubes, but this did not fix my treble noise issue at all.

Nice looking small unit, I like that (and the visible valves!). The sound description reminds me what I say about my tiny SRA-3S. And the price is a bit more accessible than other electrostat amps. Unfortunately, I cannot reach their website at the moment. But what worries me again, and again ...

Does it mean that I should buy a tube tester ?

The bias voltages were already checked and are correct on both channels.

Thank you for your help. However, I am the one who wrote the thread you mentionnned, and know the issue is not the same at all.

I am the happy owner of a Stax SRA-3S amp (rebuilt -all recapped- by the seller, purchased some years ago, and used from time to time). I recently discovered a strange issue : on both channels, on treble peaks/transient/abrupt notes (i.e : maracas recorded very close to microphone, or some...

Hello, 2 or 3 years ago, I bough a second hand SR-X (Mk2 I guess) in a great shape (just had to buy new original pads), beside a pair of normal bias Lambda. I did not listen to it very often in the begining, however just noticed a (discrete) treble roll-off, compared to the Lambdas I own, but...

Thank you again   yes it decreased pretty fast out of the SRD7SBMKII fed by the SRM-1 Mk2 , I don't think there was a break in the line since it is an old SR Lamba wire (very useful!) and it worked perfect when it was on the headphones ; I repeated it several times   I don't know how to...

Hi Spritzer and sorry for being so long, I had been kept away from Hi Fi for a while by some personal issues...   I made the external bias test and had surprising results (I used an old Lambda wire to "feed" the headphones from a SRD7 box, this giving me the perfect plug...)   1) I was very...

Thank you very much, your pic is very clear.   I'll purchase an cheap mini amp to make the tests and preseve my Dual from any wrong manoever   Here are links showings the card pics, I think, too, that removing the thick green and grey wires from there is the easiest and safier way to do :  ...

Spritzer, I need your help again...   I just opened the SRD7MK2SB to look how it is made inside. I took some pictures (unfortunately I have not posted enough messages yet to show pictures here...).   Well, there is not much room behind the headphones sockets without removing the transfos, so...

Thank you very much Spritzer , this is an excellent idea and easy to do, I will do this the next weekend and then post the results !

Hello everyone   This is my first post on this forum but I read it for a long time ; english is not my first language (I am french) so I hope you will forgive some bad writing...   I like Stax headphones a lot (I can tell I am an addict...), I own one Lambda normal bias, one Lambda pro bias...