Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere.
That's because we have our own in-house Product Research team — they open the box,
verify contents, check the owner's manual, and record dimensions, features and specs.
We stay on top of new products and technologies to help people make informed choices.
Overview: The XM-GS400 is is a four channel amplifier with
independent controls for the front and rear sections. Both the front and rear
sections are bridgeable, so the amp can be used in 4-channel, 3-channel, or
Protection Circuitry: The amp has three protection circuits:
- Thermal: turns the amp off when the
operating temperature is too high
- Short circuit: turns the amp off when
the speaker outputs are short-circuited
- DC Offset: turns the amp off when it
generates direct current
Crossover: The front and rear sections of the amp have
independent crossover controls:
- Mode: 3-position switch; Low Pass,
Off (crossover is bypassed), High Pass
- Frequency: 50-300 Hz; continuously
Subsonic Filter: The front and rear sections of the amp also
have independent subsonic filter controls. The cutoff frequency is continuously
variable from 6 Hz to 70 Hz.
Bass Boost: For added low frequency output, the amplifier has
bass boost circuits centered at 40 Hz, variable from 0 to +10 dB. There are separate
bass boost controls for the front and rear amplifier sections.
Power/Ground Terminals: The power and ground screw terminals
are 0.55" wide.
Remote Terminal: The remote turn on screw terminal is
Speaker Outputs: Each speaker output screw terminal is
Speaker-level Input Harness: An 8-pin speaker level input
harness is included, allowing you to easily connect the amplifier to a factory
radio or a receiver without preamp outputs.
Auto Turn-on: When using the speaker level inputs, the amp
will automatically turn on when it senses an input signal.