Building a competent marine entertainment system has never been easier, especially with Sony's XM-604M 4/3 channel marine amplifier at the core. Designed to resist the rigors of salt water and sunshine, this amp features multiple channel configurations and single-side electrical connections to suit almost any application.

Designed to resist the rigors of salt water and sunshine. Click here for a larger image

View a dimensional diagram (units in inches). Click here for a larger image

Marine Ready

The XM-604M is made to endure everything the marine environment will throw at it. Conformal circuit board coating protects the internal electronics. UV-resistant paint and anti-rust paint on front panel and bottom plate keep it protected from the sun's rays and oxidation. Gold-plated screws, terminals, and connections all resist corrosion.

High- and Low-Level Inputs

The XM-604M features both RCA pin jacks for low level inputs, or you can make a direct connection with the speaker output (e.g., a high-level input connection) of your marine audio unit if it is not equipped with the line output. Input level is also adjustable, so you can match your receiver's output perfectly for minimal distortion.

Low- and High-Pass Filters

This amplifier features a built-in low-pass filter with an 18 dB/octave slope, and a high-pass filter with 12 dB/octave slope, both at 80Hz.

Pulse Power Supply

This unit has a built-in power regulator which converts the power supplied by the 12V DC marine battery into high-speed pulses using a semiconductor switch. These pulses are stepped up by the built-in pulse transformer and separated into both positive and negative power supplies before being converted into direct current again. This is to regulate fluctuating voltage from the marine battery. This light weight power supply system provides a highly efficient power supply with a low impedance output.

Protection Circuitry

Protect both your vehicle's electronics and this amplifier with built-in protection circuitry for thermal overload, direct current, and short circuiting. The unit will shut down after indicating the issue with a red LED.

XM-604M Select Specifications

What's in the Box

Sony XM604M Marine 4/3 Channel Amplifier, High-Level Input Cable, Mounting Hardware, Protection Cap, Documentation