CEA-2006 Compliant: CEA-2006 is a system of testing and
measurement for mobile audio amplifiers. This voluntary standard advocates a
uniform method for measuring an amplifier's RMS power output and signal-to-noise
ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts
and the RMS power output is measured into a 4Ω load, with 1% or less Total
Harmonic Distortion plus noise (THD+N), and over a frequency range of 20 Hz to
20 kHz (for full range amplifiers). Signal-to-Noise ratio is measured in
weighted absolute decibels (dBA) at a reference of 1 watt into 4Ω. CEA-2006
standards allow consumers to compare car amplifiers and receivers under the same
conditions (apples to apples). Using CEA-2006 criteria, the Alpine PDR-M65 is
rated at 450 watts RMS x 1 channel with an 87 dBA signal to noise ratio. The
signal to noise ratio at the rated power output (not CEA-2006 conditions) is 113
LED: The top mounted LED Power indicator glows blue when the
amplifier is turned on and changes to red when the protection circuit is engaged.
Speaker Level Inputs: The RCA inputs will accept either
speaker-level or line level signals from your car's head unit. A speaker level
signal is connected to the RCA inputs using a speaker wire to RCA adapter (sold
Auto Turn-on: When using a speaker level input, the amp will
turn on automatically when it senses the input signal.
Verification Certificate: The amplifier comes with a
certificate that lists the RMS power output of the specific amplifier. It also
lists the model number, serial number, test date, and the test conditions (14.4
volts, 2 ohms).
Hidden Controls: The amplifier's controls are hidden under
a cover plate. The plate is removed by unscrewing two machine screws with the
supplied 2mm Allen wrench.
Gain control: The gain setting is
continuously variable from 0.2 to 4.0 volts.
Low Pass Crossover: The built-in 24 dB/octave low pass
filter's crossover point is variable from 50 to 400 Hz. Because this is a
subwoofer amp, the crossover is always engaged.
Subsonic Filter: The 24 dB/octave Infrasonic Filter removes
ultra-low frequencies that cannot be reproduced by most subwoofers. These
frequencies do not become sound, but unnecessary oscillations which affect sound
by causing distortion. These frequencies also waste amplifier power and can
cause damage to speakers. The filter's crossover point is variable from 8 to 40
Bass EQ: The bass boost circuit, centered at 50 Hz, is
variable from 0 dB and +12 dB.
Terminal Layout: For wiring convenience, all of the inputs
and outputs on the amplifier are on one side.
Power Input: Two set-screw terminals are provided for
connecting the power and ground cables. The terminals accept up to 4-gauge wire
(a 4-gauge wiring kit is recommended). The set screws are tightened/loosened
with the included 3mm Allen wrench.
Remote Turn-on: The remote turn-on set screw terminal will
accept up to 12-gauge wire. The set screw is tightened/loosened with the
included 2mm Allen wrench.
Speaker Outputs: There are two pair of set-screw speaker
output terminals; they are internally wired in parallel, making it easy to
connect two subwoofers. The terminals will accept up to 8-gauge wire and are
tightened/loosened with the included 3mm Allen wrench.
Signal Input: The Alpine PDR-M65 is equipped with a pair
of female RCA jack inputs.
Line Level Output: The amplifier has a pair of RCA line
level outputs for feeding another amplifier (4V max); it is the same signal that
is input through the RCA line inputs. The amplifier's crossovers have no effect
on the line level output signal.
Fuses: The amp is protected with two 35-amp ATO fuses.
Wired Remote (optional): Alpine's wired remote control (item number
500RUXKNOB, sold separately) plugs into the RJ-25 Remote Bass Control terminal,
giving you attenuation control of the sub(s) from anywhere in the car (0 to -20 dB).