These are modded servos for Acoustat speakers. Full Range, Direct Drive, Electrostatic Speaker System with integral self-contained Servo-Charge tube amplifier. Plug and play. You need only a preamp to drive the speakers.
Serial numbers are #1362A & 1362B.
Great working condition.
The amplifiers have the following upgrades.
All electrolytic capacitors replaced.
New 6000VDC output coupling capacitors.
New high voltage power supply polypropylene Auricap capacitors.
New high voltage Caddock non-inductive resistors.
Film capacitors and rectifier changed.
All the 6HB5 tubes are new (NOS).
No modification to the schematic, it is original.
Sold AS-IS. They work fine right now. If you know these amps then you know they can be delicate. Besides minor cleaning I have had no problems with mine in the 2 years I have owned them. I am moving on to a heavily modded servo
Shipping is $250 I would be willing to meet within 5 hours or so of 47240
I will add more pics as I get time or request more info
2 Acoustat servo amplifiers
Re: Acoustat Amplifier Model X servos with mods
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