PDX Amplifier Design: Class-D amplifiers boast
higher efficiency, produce much less heat, and draw less current than
traditional Class-AB amps. The PDX series is Alpine's
super-efficient power density design of full-range and monoblock class-D amps. They combine MOSFET power supplies, MOSFET final outputs, and a
thermal management processor, along with a 6-Layer Glass Epoxy PC Board to
create a high-end sound quality without the bulky heat sinks required by most
amps with this much power.
STAR Topology: Alpine's unique STAR (Signal Transit for Accurate Response) Circuit PCB design
provides a single common ground for all amp sub-blocks, preventing ground
interference and minimizing internal noise.
Power Management Processor: The Alpine PDX amplifier incorporates
Alpine's new Power Management circuit. The Power Management Processor controls
all aspects of amplifier performance, monitoring voltage, temperature and output
to ensure uninterrupted power output for non-stop listening.
Uninterrupted Protection Circuits: If the amplifier gets too
hot, the Thermal Protection circuit kicks in and gradually decreases output
power until it cools down. Once cool, the power output automatically increases
back to the previous level. If the circuit detects a Low Battery condition, it
will gradually decrease power output if battery voltage becomes too low. Once
the battery voltage increases, power will be restored. This interruption-free
design allows for non-stop enjoyment with no hiccups or drop-outs, just clean,
Monoblock Design: The Alpine PDX-M12 is a monoblock subwoofer
amplifier designed specifically to handle low frequencies between 5 and 400 Hz.
Low Impedance Stability: This amp is stable at low impedances and is
capable of its rated power (1200-watts x 1-channel) from 2 to 4 ohms. This allows
excellent flexibility with multiple speaker and subwoofer loads and is adjusted
CEA 2006 Compliant: The PDX-M12'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 if they come from
different brands. Manufacturers who adhere to the standards can display the CEA
2006 logo on their products and packaging.
- 4-ohm Load: 1200 watts x 1-channel in 4-ohms @
20 to 400 Hz with 1% THD+N
- 2-ohm Load: 1200 watts x 1-channel in 2-ohms @ 20 to
400 Hz with 1% THD+N
Verification Certificate: The amplifier comes with a
certificate that lists the RMS power output of the individual amplifier. It also
lists the model number, serial number, test date, and the test conditions (14.4
volts, 4 ohms).
Ultra-Wide Frequency Response: The Alpine PDX-M12 offers a super-wide,
frequency range (5-400Hz) for unparallel sound quality and detail.
Ultra-Low Output Impedance: With ultra-low output impedance, the
PDX-M12 offers extremely controlled, tight bass for unprecedented sound quality.
The amplifier's Damping Factor is rated at >1,000.
High Signal-to-Noise: This amplifier is capable of S/N ratios
up to 92dB S/N @ 1W, 123dB S/N at rated power for extremely clean, uncolored
sound. The PDX amp delivers crystal clear music every time, without unwanted
background noise or static.
Beefy Power Supply: The PDX amplifier's power supply delivers
tremendous headroom with low distortion and noise. The PDX amplifier has an
extremely high total system efficiency of ~80% (power supply is rated at >90%,
output stage is rated >90%).
Stackable: The PDX series amplifiers are 20% thinner than
previous models at only 2" thick. A newly designed stacking system packs the
amps closer together so there are no gaps and to save space in the trunk while
directly coupling the amps heatsinks to help share cooling duties.
Notes: When stacking multiple amplifiers, do not install vertically or at an incline. Any stack installation other than parallel to the
vehicle floor, invalidates the warranty.
LED: The top mounted LED Power indicator glows blue
when the amplifier is turned on.
The Alpine PDX amplifier's controls are hidden behind a decorative front-panel.
The front-panel is removed by unscrewing one machine screw with the supplied
hex key and then prying the front panel open.
Gain Control: The PDX-M12 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 gain settings is continuously variable from 0.1V to
Also called an infrasonic filter, a subsonic
filter cuts off extremely low bass (below the range of human hearing) that many
speakers cannot effectively reproduce, thereby making the amp's power supply and
output devices, and the speaker, more efficient. The subsonic filter can either
be set to 30Hz, 15Hz or Off.
Low Pass Filter: The amplifier features a built-in Low Pass
Filter with a rotary, variable adjustment knob which permits adjustment of the
crossover frequency, by rotating the knob to select any frequency between 50 to
400 Hz (-24 dB/oct) as the crossover point.
Wired Remote (optional): Simply add Alpine's wired remote control (500RUXKNOB, sold separately), and get full control from the front of your vehicle for remote
bass adjustments. You also have the ability to control multiple amps from just
one controller with simple telephone cord adapters (also sold separately).
Terminal Layout: For wiring convenience, all of the inputs and outputs on the amplifier are on one
Quick Connect Plugs:
The PDX series amplifier uses quick connect plugs to attach your system's
speaker wires and power cables to the amp for a simple, error-free installation.
Quick Connect Speaker Terminals: The Alpine PDX-M12 includes
connect high-power speaker terminal. Bare speaker wire, up to 8 gauge, is held in place by
two screw-clamps on the quick connector. The speaker terminal quick connector then plugs into the amplifier.
Quick Connect Battery Terminals: The removable battery
terminal quick connector features a low-loss, high-current design. It accepts up
to 4GA wire for power and ground, to ensure your amp gets the power it needs
while allowing for easy installation. The remote-turn on lead will accept up 12
gauge wire. The power, ground, and remote-turn on lead are secured by set-screws
on quick connector. The battery terminal quick connector then plugs into the amplifier.
Line Level Input: The Alpine PDX-M12 is equipped with two
gold-plated female RCA jacks.
Line Level Output: In addition to the line inputs, the
PDX-M12 has non-fading left and right female RCA outputs for extra system
flexibility, so you can daisy chain a second PDX monoblock amplifier.
Fuses: The Alpine PDX-M12 is equipped with four 25-amp ATO fuses.