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.
Features
Controls
Connections
Features
Power Supply: The MRP-F300
amplifier's power supply uses MOSFETs to convert DC battery voltage to the
higher DC voltages needed for high power. It supplies positive and negative
voltages around 0V, rather than around 6V as with conventional single-polarity
power supplies. The result is higher power levels and a dynamic range wider by
as much as 10dB.
Inputs: The amplifier offers both line-level and speaker-level inputs
for 4 channels. The supplied speaker-level input harness allows you to connect
this amplifier to a receiver without preamp outputs; aftermarket or factory.
Line Outputs: This amplifier has a pair of non-fading stereo RCA line
outputs. You can use these outputs to daisy-chain another amplifier without
having to run additional signal cables from the receiver.
Terminal Covers: The amp comes with
two
plastic covers that protect and insulate the RCA, power, and speaker connections.
Four supplied
machine screws attach the covers to the amplifier.
Controls
Gain Controls: This amp has independent front and rear channel gain
controls.
Crossovers: Both front and rear channels have independent high-pass
and low-pass crossovers. The crossover points are continuously variable from
50-400 Hz and the slope of both is 12dB/octave. Each set of channels has a
high-pass/low-pass/off switch.
Subsonic Filter: This amp
utilizes a subsonic filter at 15Hz to eliminate super low frequencies that can rob
power and damage speakers. The subsonic filter operates at all times; it cannot
be turned off.
Bass EQ: The Bass EQ circuit provides a fixed boost of 12dB at 50 Hz
for the rear channels only. The Bass EQ can be turned off and does not function
when the amp's rear-channel crossover is set to high-pass operation.
Connections
Left Side Of Amplifier:
- GND (ground): gold-plated screw terminal, 0.33" wide
- Battery: gold-plated screw terminal, 0.33" wide
- Remote: gold-plated screw terminal, 0.33" wide
- Speaker Outputs: gold-plated screw terminals (8), 0.33"
wide
Note: Alpine recommends 8 gauge power and ground wire
(minimum).
Right Side Of Amplifier:
- Line Inputs: 2 pair of gold-plated stereo RCA jacks
- Line Output: 1 pair of gold-plated stereo RCA jacks
- Speaker Level Input: Molex plug input for supplied
4-pin harness
