spritzer

The direction of the power plug is crucial as the power systems aren't star wired anymore. With it pointing in the right direction you shouldn't get any hum so I'd test the bias supply with the transformers in the circuit and see what happens. As for measuring the bias, you need a VTVM to accurately measure it since the impedance is so high.

I mean one would have to search mouser, digikey, Allied etc. and that takes a lot of effort...

Well that and the 50th anniversary of the earspeaker. Plans are already in motion to celebrate it...

Naturally, 2010 is the year of Stax.

By using transformers to perform phase splitting then it should work.

I find that no cable gives me the best sound with some headphones...

I just looked at all my pics of SRA-14S amps and sorry, no detailed internal pics. It did how ever confirm my believe that your particular amp is a prototype as it lacks all the ususal markings found on all Stax amps such as the full company name, input voltage and Made in Japan.

Bugs me too, don't know why...

I do hope they release it soon as I wouldn't mind a set too.

Great news but are they going to make this any time soon? The small sub-sat speaker still hasn't reached production status...

Happy new year everybody!! About 30 minutes left to go here and the sky is already lit up and will stay so until well past 1am.

I think he sold his set.

Way too cool!!!

Happy Birthday!!!

Agreed, brilliant series.

Even I have that SACD and I'm nothing more then a casual fan.

Shhhh Marc, it's all magic!!!

Happy birthday!!! I made you some honorary baguettes but then I sold them all...

I have about 1200 CD's, 300 LP's and had a bunch of DVD's but I gave them all away just before Christmas. There is also a lot of music on my home server.

Happy Birthday!!!

Hell yeah!!!

Are the stators painted black on the ESL57? Almost all black paints have carbon in them which isn't a very good idea with high voltages. Even the guy which runs Quads Unlimited made that error though...

The difference between a SR-404 and the LE is so big that I'm sure tweaked drivers come into play. The LNS drivers are all but identical to the SR-404 yet they sound nothing like each other.

Pffft... I do think that a large potion of the HE60's out there aren't running at 100%, at least that has been my experience with the sets that have come through here. That includes the two "recently serviced" units which were clearly not done right by Sennheiser. Damn I want to buy a HE60 now...

The 4070 enclosure is brilliant but so is the whole headphone design. Managing the backwave without resorting to diminish the true dipole action of the drivers is something to be very proud of for Stax.