Digital Amplifier Part Number: MZ-100 each The MZ-100 is a 4 channel 100 watt amp that uses digital signal processing. This unique feature allows multiple EQ settings as well as system integration with the RD-44 and MRD-70. Features 8 preset equalization settings for application configuration 4 channel output can power up to 4 speakers and 1 subwoofer DIN cable inputs for connection to RD44 direct or MRD-70 system Separate waterproof volume control Auxiliary input (RCA Type) Specifications Frequency response: 20Hz to 20KHz (Contoured response) SNR: 90dB THD: <1% Max. full power full load Max operating power: 45W /channel x 4 RMS operating power: 25W/channel x 4 Power consumption: 7A Max, full power driving 4 speakers @ 2 ohms Dimensions: 4.3"x 6.7" x 1.57" (110mm x 170mm x 40mm) Weight: .425kg