The double-bypass high/low-pass Butterworth crossover for operating a multi-amp system or subwoofer system makes it ideal for use with high quality speaker systems and allows for the creation of very high sound pressure multi-amp systems. Sound was present until removed, power is present, gold plated part on IN A L side is missing. Specifications: 4ch (4/3/2ch) power amplifier.
Rated output power: 63W x 4 (4?) + 220W x 1 (4? Frequency response: 4Hz to 85KHz? Input sensitivity: 0.2V to 5V. Crossover: High-pass 40Hz to 5kHz (12dB/oct) Low-pass 40Hz to 5kHz (12 to 24dB/oct). Size (W x D x H): 6.9 x 14.8 x 2.2 in. Stored in the shade at home??? Car audio size --- 1DIN. Type of car audio --- Amplifier.Shape of car audio --- Other.