Some of XM-604M sony amplifier features:

Maximum power output of 110 W per channel at 4 Ω and can be used as a bridging amplifier with a maximum output of 300 W. Built in Low-pass filter (80 Hz) and High-pass filter (80 Hz). Protection circuit and indicator provided. Hi-level Sensing Power On feature allows unit to be activated without need for REMOTE connection. Pulse power supply for stable and regulated output power. Direct connection can be made with the speaker output of your marine audio unit if it not equipped withe the line output. Gold-plated connectors and conformal coated circuit board for marine use.

XM-604M specifications

Circuit system: output transformerless circuit Pulse power supply
Inputs: RCA pin jacks, High level input connector
Speaker impedance: 2-8 Ω stereo, 4-8 Ω when used as a bridging amplifier
Maximum output: 4 speakers: 110W x 4 (at 4Ω), 3 speakers: 150W x 2(at 2 Ω) + 300W x 1 (BTL at 4 Ω)
Rated output: 4 speakers: 60W x 4 (at 4Ω) – THD: 1%, 70W x 4 (at 2Ω) – THD: 1%
Frequency response: 5Hz – 50kHz

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