I have just finished a pre-amp kit based around Lite audio A-15 board and MV-01 switching relay board, both obtained from DIYclub.biz.
I tried to pair it with my gainclone based on the BrianGT kit (gain 33) but on my disappointment I realized that the pre-amp gain is far too high. I could not turn the pot (100K alps) more then a degree or two without pushing 3886s into clipping.
The first question is regarding the pre-amp configuration. I wanted to have the A-15 board after the pot so it can act as a signal buffer. Is that a good idea or should I put it before the pot.
My second question regarding the pre-amp gain. I attached the schematics of the preamp (one channel only) and the accompanied regulated power supply board. Does anyone have an idea how to cut down the pre-amp gain.
I have quite sufficient gain out of the power amp - I need pre-amp only as a "signal conditioner" and impedance matching unit.
I tried to pair it with my gainclone based on the BrianGT kit (gain 33) but on my disappointment I realized that the pre-amp gain is far too high. I could not turn the pot (100K alps) more then a degree or two without pushing 3886s into clipping.
The first question is regarding the pre-amp configuration. I wanted to have the A-15 board after the pot so it can act as a signal buffer. Is that a good idea or should I put it before the pot.
My second question regarding the pre-amp gain. I attached the schematics of the preamp (one channel only) and the accompanied regulated power supply board. Does anyone have an idea how to cut down the pre-amp gain.
I have quite sufficient gain out of the power amp - I need pre-amp only as a "signal conditioner" and impedance matching unit.