This circuit has a gain of 6 dB for low frequencies from 85 Hz and can be used in a mini subwoofer. The circuit is from a Radio Electronics from March 1990.
We find this circuit in the manual of the used integrated circuits. The manual is from Linear...
We found this circuit in a 1975 radio amateur documentation. The circuit uses TTL technology and...
In other circuits we have seen a circuit for this application whose calculations have been...