spritzer

Yeah, we tend to build a lot of stuff. Today I've been working on ways of making a very complicated singled ended triode Stax amp.

Done

Yup, we need higher resolution. It's certain though that the voltage can be changed.

They are absolutely worthless but I think everybody knew that going in. It's funny that people don't even want them on loan...

Can you post a high resolution picture of the labels on the transformer and where the wires are soldered into the PCB? It's quite clear what needs to be done but I want to make sure that there is nothing hidden. When configuring a component for 230V you need to wire the primaries in series but for 117V they are in parallel. For this the picture from 6moons makes sense but I just want to make sure that it is the case.

If the diaphragm is intact then there is no reason to swap it out. Just recoat it and replace the dust cover. Given that the first one was pretty crappy it was expected but I'm not sure these are an improvement. Same cavernous earpads which were the worst offenders...

I wouldn't look blindly at the jumpers as there are clearly two ways for them connect the transformer primaries. Those are also not the same transformers. Is the picture you posted of the 117V setup your own unit? If so, look all around the transformer for any writing as to which wire is which. Then remove the jumpers and ohm out the connections to the jumpers. Then you will know how to connect them.

Mine is still out of commission but then again, I haven't touched it in months. Too many projects, not enough time.

They were always Stax compatible and intended to be run off Stax Pro bias. The "manual" even states they should be run at the Pro standard. Well that and the bias supplies in the amps were ca. 580V. I was talking more about the entire setup rather than the headphone stand. That is the HPS-1 though. I also have that exact same version of SR-1 and it sounds bloody good... Yeah, the ones which reached retailers in August last year. That product cycle even has Cavalli beat...

I really like the Stax stand at CES2014... http://speaker.yesky.com/105/35737605.shtml Nice to add the SR-Lambda and SR-1. Also, King Sound are at it again: http://kingsaudio.com.hk/headphone.html Might either of this suck less than the H1?

There is a source in Japan (linked somewhere in thread) that has most, if not all the semis and we know they are legit. There is a PM function but it might be limited at first.

All the audiophools need are pilot lights that can be rolled for piece of mind. If somebody wants to read about the proper use of caps with tube rectified PSU's I recommend the EML datasheets. These will die an early death in the Woo amps and this shows exactly why.

This was years back but somebody simulated the ideal vinyl playback setup and figured out that it was the equivalent of 14bits. Sampling rate was something close to 80kHz if my memory doesn't fail me. This is naturally never going to happen in real life as the records wear, so do the pickups, the tables are never 100% accurate, the RIAA eq never 100% correct etc.

150mA is overkill so the problem is just with SumR. All the other ones I've had made had no issues.

It would be funny to try and explain that on the tax return. "Sure I should get the VAT back on this... it's a new way of slicing bread... honest...."

Seem to be going after the SR-Omega style driver... Nice of them to use a Gilmore derived amp too. The VAW TA-8PS is just a slightly modified GES with Pentode outputs.

That's the same BS Woo are up to. In the WES it's the tube, followed by one of those ultra cheap Chinese bridges and into a 100uf cap. Makes less sense than usual...

Another one bites the dust.

That's my point exactly, everything here is done badly but the Alo Studio Six is billed as the best there is by shills/reviewers. It must be awesome as it has 4 TRS sockets which all will drive your headphones equally badly and some tubes that can be rolled endlessly. What more could anybody want? Well the PSU is fubar and so it the heater supply. I'm all for running the tubes off DC but any good designer would use a custom transformer which has enough headroom to regulate said DC. Pehaps Marc is right and the high ripple was part of the design... Then we have the 47uf cap after the rectifier which guarantees that the owners of this pile of fail will be rolling rectifiers like crazy to try and find one that tolerates being run on the limit. Not quite as bad as the Woo crap but that also takes a special level of skill. As for the actual amp section, I agree with Doug that there isn't a chance in hell this was designed to drive headphones. Also any tube amp will also only be as good as the transformers it uses so the best they could do is the cheapest Edcor? This is a 4200$ amp not some 500$ Chinese ebay job.

That would make sense as I'm still using Nec parts.

Why would they tell the dealers who are supposed to flog the unsold stock...

The Jade and the HE-5 hold a special place for me as some of the worst headphones ever made so no, they are not good. I really don't get why people think the HE-6 is good...

Well they are as good as the WES driving a SR-007Mk2, so pretty much shit then...

Ahh that's right. What the hell is the AZ then? So good it covers all the (US) alphabet?

Puts fingers in ears... "LALALALALALALALALALALALA" I need a proper workshop and then it's time for CNC.