sbelyo Posted April 25, 2017 Report Share Posted April 25, 2017 So I picked up a pair of Stax SR-40 on ebay. I know they're electret and do not require a charge to be fed to them. They have the standard 5 pin stax plug it looks like. Can I use these with the current feedback electrostatic amp? Quote Link to comment Share on other sites More sharing options...
congo5 Posted April 25, 2017 Report Share Posted April 25, 2017 yes be careful with the volume Quote Link to comment Share on other sites More sharing options...
sbelyo Posted April 25, 2017 Author Report Share Posted April 25, 2017 Excellent... Do I have to wire the jack differently? Quote Link to comment Share on other sites More sharing options...
JimL Posted April 25, 2017 Report Share Posted April 25, 2017 (edited) You should be able to use it with any electrostatic amp. Dr. Gilmore has suggested that you keep the level down in electret phones to below 200 volts, but that is still pretty loud. The jack is wired exactly the same as with the standard Stax phones, but the bias pin is not connected to anything. Edited April 25, 2017 by JimL Quote Link to comment Share on other sites More sharing options...
sbelyo Posted April 25, 2017 Author Report Share Posted April 25, 2017 got it... Now I must build it. Quote Link to comment Share on other sites More sharing options...
spritzer Posted April 25, 2017 Report Share Posted April 25, 2017 These are handy to keep around for testing amps as they indeed don't need a bias supply. Just hook up a channel and you are good to go. Quote Link to comment Share on other sites More sharing options...
sbelyo Posted April 25, 2017 Author Report Share Posted April 25, 2017 That's what I was thinking when I saw them come up. Since I'm going to start building the electrostat stuff I needed a set of test cans. I just couldn't see hooking up a new pair of stax only to blow them up. Definitely easier to swallow $70 vs $400 or more Quote Link to comment Share on other sites More sharing options...
wink Posted April 26, 2017 Report Share Posted April 26, 2017 There are those who would aver that your $70 earspeakers sound better than some of those uber$400 ones...... Quote Link to comment Share on other sites More sharing options...
masamoto Posted May 22, 2017 Report Share Posted May 22, 2017 makes me regret not getting a Current Feedback Amp set in the last GB. Quote Link to comment Share on other sites More sharing options...
nopants Posted May 23, 2017 Report Share Posted May 23, 2017 shouldn't be horridly expensive to get a run made for the cfa, considering you need 4 an amplifier Quote Link to comment Share on other sites More sharing options...
Cattler Posted June 15, 2017 Report Share Posted June 15, 2017 The SR-40 is an electric model and needs no bias voltage. Since the one you sawing comes with the SRD-4, all you would need is a power amp/integrated amp/receiver and then you would hook up the SRD-4 to speaker outputs. The SR-40 would too work with any of the Stax amps. I have SR-80 and they have a very nice midrange, but are missing in bass and treble compared to best gaming headsets. I wouldn't pay more than $75 for them, and only if in excellent condition. Quote Link to comment Share on other sites More sharing options...
Torpedo Posted June 15, 2017 Report Share Posted June 15, 2017 2 Quote Link to comment Share on other sites More sharing options...
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