spritzer

"In Soviet Russia headphones listen to you!"

With any of our amps (have to put the caveat "when built properly" as I've seen people jumper the safety stuff) and the Stax ones the damage potential would be minimal. With the bias, sure it is 580V but it's based on a very current limited voltage doubler circuit plus the 4M7 high voltage ballast resistor on the output will prevent any damage. The amp section could deliver some real hurt though, +/-400V or upwards power supplies with the amplifiers being able to swing almost from rail to rail meaning you could see ~1500Vpp or more at one output. This plus generous class A biasing means there is a lot of power at play here, hence the 5.1K output resistors. If there would be a short to ground (i.e. you) they would take off the worst of it. Now look at Woo Audio, Cavalli plus other amps and these protection provisions are just not there.

I hope they are actually good but all the Voce feedback has been pretty abysmal...

Seems I made Thinker, aka "person in charge of damaging the reputation and decreasing sales of Perrun" a bit testy. Ahh joy of joy's... Also funny how people keep going on about me offering up the HE90 frame with Lambda drivers for 6k$. Anybody want to guess how much two HE90 cups, the headband, cable, box and those insane little plastic gimbal pieces cost? Yup...more than 6k$... Ohhh and I got the last of these so no way asking Senn for any more... I did try to get a HE-1 without the amps and cable but they kindly refused.

forum.doctorhead.ru and a few others.

Given that any discussion about these has been banned on the Russian forums and king fucktard Thinker is preaching the gospel fervently...I'll take a hard pass.

That is the usual Cavalli BS. No way that the distortion+N is that low. I could test it but I kinda broke the tube when inserting it into the amp. I did order some new ones...

2SA1831 or 2SA1967?

Class A or death!!!!

White PCB's are an utter pain. I switched over for a while and...quickly went back to green. High gain and no NFB is a really, really bad idea, you need to stabilize the circuit. Whether this has enough gain, I'm not sure.

I hope they aren't sourcing resistors from the Shengzen market for a 50K$ setup. Well knowing Hifiman that would probably be the case... Seriously, how much would the upgrade cost be to teflon tube sockets?

In reality this is never needed if the resistors are the right type for the job. PRP crappy engineering non-withstanding...

You terrible tempter you!!! That just can't be with their stellar report of excellent build quality!!!

That cable just makes me cringe... was there nothing else available except cheap techflex?

Somebody in China tries to make a clone and fails...

Not nearly enough voltage to do something like that. 600V isn't fun but compared to a taser it is almost nothing...

Ahhh indiegogo...home of all the really, really legitimate shit.

Sunlight and thin plastic membranes don't mix but they are pretty resilient otherwise

It's finally ready...only after two years... https://www.head-fi.org/threads/stax-sr-002-srm-002-and-srm-003-mk2-srm-003-impression-and-appreciation-thread.631894/page-32#post-12238152

There are only 300 of the amps and 800 headphones so this seems like a dealer BS to me.

So PEEK...

Stax have never said what the diaphragm is but they might have moved away from mylar. Plenty of new materials to play with these days...

I'd just go with Mouser.... https://www2.mouser.com/ProductDetail/Metcal/PS-900?qs=sGAEpiMZZMtV0HPngiEil%2frl7NJWznw4

You need to compare the results as a voltage divider so one end to wiper and then the other end to the wiper.

So the electrons don't fall out?