MRX Amplifier Design: Class-D amplifiers boast higher
efficiency, produce much less heat, and draw less current than traditional
Class-AB amps. The new MRX series benefits from the technology trickledown
from Alpine's more expensive PDX amps, including Direct FET final outputs,
thermal management processor, 6-Layer Glass Epoxy PC Board; combining to create
a high-end sound quality without the bulky heat sinks required by most amps in
this power class.
Power Management Processor: The multi-stage Power Management
Processor continuously monitors component temperatures throughout the amplifier
and decreases power output if anything gets too hot. When playing music under heavy
loads for long periods, the circuit automatically reduces power output slightly
at first, and then further in a second stage if necessary. This two stage approach
provides an interruption free listening experience.
Multi-Channel Design: The Alpine MRX-F30 is a 4-channel
amplifier, basically two independent 2-channel amplifiers built into one chassis.
Either side can be bridged so it can be used as a 4-channel, 3-channel, or 2-channel
amplifier. The amplifier is stable down to 2-ohms in stereo, and 4-ohms when bridged.
CEA 2006 Compliant: The MRX-F30's power ratings are measured
according to the strict standards dictated by the Consumer Electronics Association
(CEA). These standards allow you to accurately compare the rated power output of
all CEA 2006-compliant amplifiers, even different brands. Manufacturers who adhere
to the standards can display the CEA 2006 logo on their products and packaging.
- Four-Channel (4-ohm): 50 watts x
4-channels into 4-ohms measured from 20 Hz to 20,000 Hz
with no more than 0.07% THD+N
- Four-Channel (2-ohm): 75 watts x
4-channels into 2-ohms measured from 20 Hz to 20,000 Hz
with no more than 0.09% THD+N
- Bridged (4-ohm): 150 watts x 2-channels
into 4-ohms measured from 20 Hz to 20,000 Hz with no more than
Signal-to-Noise: When measured under CEA-2006 conditions
(reference 1 watt into a 4-ohm load) the signal to noise ratio is 87 dBA.
Measured at the rated power output S/N is 104 dB.
Verification Certificate: The amplifier comes with a certificate
that lists the RMS power output measured from that specific amplifier. It also lists
the model number, serial number, test date, and the test conditions (voltage and
Wide Frequency Response: The Alpine MRX-F30 offers a wide
frequency range (5 Hz-45 kHz, +0/-3 dB), much wider than the range of human
Auto Turn On: When using the speaker level inputs the X-Power
amplifiers automatically turn on when voltage is detected on the signal inputs,
making them an easy factory system upgrade.
Low Output Impedance: With low output impedance, the MRX-F30
outputs tightly controlled bass, with a damping Factor rated at greater than 500.
LED: The top panel LED power indicator glows blue when the
amplifier is turned on.
Gain: The MRX-F30 provides independent rotary controls for
the front and rear channels to set the amplifier's gain according to the level
of the incoming signal. The line-level input gain settings are continuously variable
from 200 mV to 4.0V; the speaker-level input gain settings are continuously variable
from 500 mV to 10.0V.
Crossover Mode: There are also independent crossovers for the
front and rear channels; each can be set to Off (full range), HP (high pass), or
Crossover Frequency: You can independently select the crossover
frequency for the front and rear channel crossovers; each is continuously variable
from 50 to 400 Hz. The crossover slope is 12 dB/oct.
Bass EQ: Bass boost can be applied to the rear channels. It's
variable from 0 to +12 dB and centered at 50 Hz.
Power/Ground/Remote: The MRX-F30 features set-screw terminals
for the Power, Ground and Remote Turn-on inputs. The Power and Ground terminals
will accommodate up to 4 gauge wire (Alpine recommends 8 gauge minimum), the Remote
Turn-on terminal will accept up to 8 gauge wire.
Speaker Outputs: The screw terminal speaker outputs accept
spade connectors up to 0.33" wide.
Line Level Input: The Alpine MRX-F30 has four female RCA jacks
labeled CH1/CH2 (front) and CH3/CH4 (rear).
Speaker Level Input: Use the included speaker level input
harnesses if the connected radio has no preamp outputs.
Fuses: The amp is protected by two 25-amp ATO fuses.