The FK642 is a fixed-gain amplifier that boosts incoming lower audio frequencies whilst attenuating the higher frequencies to give a deeper, richer sound in audio systems that utilize smaller speakers.
Power Supply : 12VDC @ 5mA max.
Input impedance : 47KOhm
Frequency range : 150Hz-250Hz
PCB Dimensions : 2.46" x 1.63" x 0.6" (57.7mm x 41.4mm x 15mm)