This is admittedly a silly question and I'm pretty sure the answer is obviously no, but has there ever been a portable (i.e., battery-powered) electrostatic amp?
Seems unlikely, but you never know the ingenuity of headfiers!
If someone in Colorado (hint hint) would actually send me
the transformer they have promised me for 5 months now, there
would be a DIY electrostatic portable.
Stax SRM-X Pro actually used to have a battery pack as an option, so there was actually a commercial battery-powered electrostatic amp at one time. Play time was only about 2.5 hours, apparently. However, I've got the amp, which does have a 12v input, so a DIY battery pack should do the trick, and probably play longer to boot.
Incidentally, this amp is a bit smaller than HEV70, but makes a much better combination with HE60 than its own HEV70 amp. I suspect that the higher bias voltage of the Stax amps may help what I hear as a synergy between Stax amps (007t and SRM-X Pro both) with HE60. I'm listening to the combo as I type.
Originally Posted by kevin gilmore /img/forum/go_quote.gif If someone in Colorado (hint hint) would actually send me
the transformer they have promised me for 5 months now, there
would be a DIY electrostatic portable.
Damn! That some lousy customer support.
Sure hope you receive the transformer soon, so you can finish the construction part.
This SRD-X Professional energizer is "sort-of portable" - it's not really a pocket modell, however.
It can be operated with a power pack or normal batteries...and it has a Pro outlet of course
Originally Posted by urs /img/forum/go_quote.gif This SRD-X Professional energizer is "sort-of portable" - it's not really a pocket modell, however.
It can be operated with a power pack or normal batteries...and it has a Pro outlet of course
You are both right. The SRD-P had an internal battery compartment, a TRS plug for input and a normal plug. Later came a version with both outputs and there was even a version made specially for the Church of Scientology. A few of them were on ebay a year or so ago. The SRM-X was designed for remote monitoring and thus the separate battery back.
Please not that the Simply Stax site is far from a great resource and is more often wrong then right.
KOSS ESP950/E90 has option of battery powered headphone system. I bought this system somewhere around mid 90's and still enjoys occasionally. Great sounding to my ears.
Originally Posted by kevin gilmore /img/forum/go_quote.gif If someone in Colorado (hint hint) would actually send me
the transformer they have promised me for 5 months now, there
would be a DIY electrostatic portable.
If you ask Alex (AK[Zip]) he might build you a transformer in exchange for your design schematics.
Why do you use the Stax SRM-X Pro over another
ES amp like the Stax SRM-007t? Is it just easier to lug around to the office, etc.? I just got an HE60, and I gotta say the HEV70 is pretty disappointing -- I'll likely be looking for some kind of upgrade soon.
By the way, I'm from Rockville too. I grew up there, and attended the same high school (Woodward HS) as the diaper-wearing, "Houston we have a problem", astro-nut stalker chick. Don't remember her, but her sister was cute.
Originally Posted by electrathecat /img/forum/go_quote.gif I just got an HE60, and I gotta say the HEV70 is pretty disappointing -- I'll likely be looking for some kind of upgrade soon.
Wise words indeed.
For a bit of fun, try running an Omega II off that sucker. The result is laughable.
Originally Posted by electrathecat /img/forum/go_quote.gif Why do you use the Stax SRM-X Pro over another
ES amp like the Stax SRM-007t? Is it just easier to lug around to the office, etc.? I just got an HE60, and I gotta say the HEV70 is pretty disappointing -- I'll likely be looking for some kind of upgrade soon.
By the way, I'm from Rockville too. I grew up there, and attended the same high school (Woodward HS) as the diaper-wearing, "Houston we have a problem", astro-nut stalker chick. Don't remember her, but her sister was cute.
I don't like to leave gear in my office. At home, I use a Singlepower ES1 and a Stax 007t. They're a lot less portable, though
The SRM-X Pro really benefits from having a bigger, stiffer power supply on it than the standard wallwart.
I went to Walter Johnson HS a few years earlier. Woodward is just a little ways up Old Georgetown Rd.
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