View Full Version : New circuit Firebottle Plus phono amp.

23-08-2015, 10:31
As posted previously the first build with the improved circuit is complete and sounding very fine indeed.

The resolution is improved compared with the previous build standard. Internal layout is thus:


Brief specification for MM version:

Passive RIAA, zero feedback.

Gain at 1kHz 40dB - Input 47k ohm, 80pF - Output impedance 200 ohms.

Supply from wall wart psu 12V at 1.2A