The FK643 is a stereo fixed-gain amplifier that boosts incoming lower audio frequencies whilst attenuating the higher frequencies. This gives a richer, deeper sound in stereo audio systems that utilize smaller speakers.
Power Supply : 12VDC @ 20mA max.
Input impedance : 47KOhm
Frequency Range ; 150Hz-250Hz
PCB Dimensions : 2.77" x 2.85" x 0.6" (70.4mm x 72.4mm x 15mm)