Here's my second complete chipamp. It can be used for driver and speaker testing and warming up or as a subwoofer amp. It was re-soldered about 10 times so it's not very cute inside and got strange knob layout. Two inputs: normal mono input and LFE input with 2 connectors. The LFE board contains channel mixer and two 2-nd order stage low-pass filter, one stage can be tuned to approx. 40..150 Hz cutoff frequency, the other one is fixed at 180 Hz (IIRC ;-)). The power amp has 2 modes, one normal gainclone mode and another one with additional negative current feedback cirquit.
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09/16/08 11:00:00 pm