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Channel Design: The Alpine PDR-V75 can be configured as a
5-channel amplifier for powering two pairs of speakers and a subwoofer. It can
also be configured as a 4-channel or 3-channel amplifier. The amplifier is stable to
2-ohms in stereo, 4-ohms when bridged.
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-V75 is
rated at 75 watts RMS x 4 channels and 250 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 105
dB for the full range channels and 110 dB for the subwoofer channel.
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.
Independent Controls: There are independent controls and
crossovers for Channels 1&2, Channels 3&4, and the Subwoofer channel:
- Gain Controls: The rotary gain controls, for matching
the amp's input sensitivity to the connected head unit, are
continuously variable from 0.2 to 4.0 volts for the full range channels, and 0.1
to 4.0 volts for the Subwoofer channel. You'll need a small screwdriver (not
included) for setting the gain.
- Crossover: The full range channels (1&2 and 3&4) each
have a -12 db/octave high-pass filter that can be turned on or off. The
cutoff frequency can be set between 50Hz and 400Hz. The Subwoofer channel
has a -24 dB/octave low-pass filter that cannot be turned off. The cutoff
frequency can be set between 50Hz and 400Hz. The Sub channel's -24 dB/octave
Subsonic filter can be set between 8Hz and 40Hz. It cuts ultra-low
frequencies from the input signal before being amplified to protect the
speakers and to minimize wasted power.
- Input Channel: The two-position input switches configure
the inputs. For the full-range channels, you can set the inputs to "1/2"
(signal from inputs 1 and 2 are sent to channels 3 and 4--no Y-adapter
necessary) or "3/4" (Channels 1&2 and 3&4 are independent--a 4-channel
source is required). For the Subwoofer channel, you can set the inputs to
"1+2+3+4" (signals from the full-range channels are mixed and sent to the
SubW channel) or "SubW" (Left/Right signals from the SubW input are
- Bass EQ: The Bass EQ circuit provides a variable 0 dB to +12
dB signal boost, centered at 50 Hz to the Subwoofer channel.
Remote Bass Control: Alpine's
RUX-KNOB wired remote control (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).
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: The five pairs of speaker outputs set-screw
terminals will accept up to 12-gauge wire. The set screws are tightened/loosened
with the included 2mm Allen wrench.
Signal Input: The Alpine PDR-V75 is equipped with three pairs
of female RCA jack inputs: Channel 1(L)/2(R), Channel 3(L)/4(R), and SubW(L)/SubW(R).
Remote Bass Control: An RJ-25 jack is provided for the
optional RUX-KNOB wired remote control.
Fuses: The amp is protected with two 40-amp ATO