Type: For Sale
Currency: USD
Price: 180
Ship to:
United States
Selling my modified O2 that has AGDR's Booster Board.
Technical details can be read about here:
http://www.diyaudio.com/forums/headphone-systems/244473-o2-headamp-output-booster-pcb.htmlThe amp is in the same O2 case, the Booster Board is plugged into the ic sockets on the main pc board.
The Booster Board plugs into the O2’s
U3 and U4 IC sockets in place of the two NJM4556A output chips. Each NJM4556A chip on the
O2 board is replaced by an OPA827 op-amp looped around a LME49600 current buffer on the
Booster Board. The parts on the Booster Board are mostly surface mount, fitting in the space
between the top of the booster PC board and the top of the O2 aluminum case. Two ground
wires attach between the booster board and the O2 PC board. A third wire also connects
between the booster board and the O2 PC board for the anti-thump circuit.
Turn on/off relay, no more thumps.
Slew rate improvement
Lower DC Offset Voltages
Lower THD
More current for low impedance cans....
Precision OPA 827 op amps
...and more..read the tech articles
Will include a 18VAC / 500ma AC - AC power adapter.
This booster board is no longer being made....one of a kind and works wonderfully.
Price $180 and I will pay for shipping...paypal ok.
Alex
