Possibly the best amplifier in the world.

[Opcom]

http://www.ebay.com/itm/12V-Battery-Tube-Headphones-Amplifier-Possibly-the-best-amplifier-in-the-world-/330846000577?pt=US_Pro_Audio_Amplifiers&hash=item4d07f555c1&nma=true&si=27f5mFrqNdtHax9z1%2B0QAVLUxzo%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557


"This amplifier is only suitable for high impedance stereo headphones like the Sennheiser HD-580.

 

Specifications:

Bandwidth DC to >>MHz

Battery operation with 12V (UPS type battery, not included)

Power consumption < 7W

Extremely high input impedance >>MOhms

No resistors, potentiometers

No Capacitors

No Transformers, Inductors

No solid state, diodes, transistors, FETS, ICs

Signal amplified by only 2 electron tubes in class A operation

Only suitable for headphones with impedance >150, <600 Ohms

 

Headphones can damage hearing at high levels. Please make shure you attenuate your signals adequately before sending to this headphone amplifier.

 

For the schematic please visit my other listings."