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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

AKSA's Lender Preamp with 40Vpp Output
AKSA's Lender Preamp with 40Vpp Output
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Old Yesterday, 03:58 PM   #781
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Output
Check polarity of the inputs/outputs from 8pins connector to your amp. One row is GND and othe row is signal. If you drive signal input to GND the sound will be very soft. Likewise if you drive outputs with GND from Preamp sound is very soft.

Your bias seems ok and gain of 10x should be plenty loud.

One way to check if Preamp is working stand-alone is to connect cheap $1 earbud headphones (free from airlines) to outputs of the Preamp. Polarity won’t matter as its isolated and if it plays loudly, Preamp is good.
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