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Alpine PDX-M12

Mono subwoofer amplifier — 1200 watts RMS x 1 at 2 ohms

Item # 500PDXM12

Alpine packs Class-D amplifier technology into their PDX amplifiers for awesome power from a 2" tall frame.

Find what Fits your car

Alpine packs Class-D amplifier technology into their PDX amplifiers for awesome power from a 2" tall frame.

Discontinued item
4 questions - 6 answers

Item # 500PDXM12

About the Alpine PDX-M12

Alpine packs Class-D amplifier technology into their PDX amplifiers for awesome power from a 2" tall frame. These small-but-mighty amps run so cool they can be stacked together into a single unit — their heatsinks couple together to cool the entire stack. Each amp offers an 8" by 10" footprint, so they'll fit in hatchbacks, trunks, truck cabs, and any vehicles with limited space.
Alpine Authorized Online Dealer

Alpine packs Class-D amplifier technology into their PDX amplifiers for awesome power from a 2" tall frame. These small-but-mighty amps run so cool they can be stacked together into a single unit — their heatsinks couple together to cool the entire stack. Each amp offers an 8" by 10" footprint, so they'll fit in hatchbacks, trunks, truck cabs, and any vehicles with limited space.

Mono powerhouse

Winner of a 2010 Innovations Award, the PDX-M12 mono amplifier supplies a stunning 1,200 watts of sub-cranking power from its amazingly compact body. Beefy internal components and clever engineering keep the power output strong and the noise low for superb fidelity and control. The adjustable low-pass filter tailors the amp's output to your specific system.

Front-mounted controls and pop-out connectors

Front-mounted controls make post-installation adjustments a snap, even when multiple amps are stacked together. Nifty removable speaker and power wire plugs make it easy to install or remove an amp, while ensuring a tight connection and guaranteeing that your speakers work in unison. Gold-plated RCA inputs, outputs, and power connections resist corrosion and signal degradation.

You can control the volume of your MRV-M500 from the front seat with the optional RUX-KNOB.2 remote bass controller.

Confused about impedance? Check out our article on matching subs and amps.

READ LESS

Product highlights:

  • mono subwoofer amplifier
  • 1,200 watts RMS x 1 at 4 ohms (1,200 watts RMS x 1 at 2 ohms)
  • variable low-pass filter (50-400 Hz, 24 dB/octave)
  • selectable subsonic filter (off, 15 Hz, 30 Hz)
  • Class-D amplifier design
  • stackable installation design with front-panel controls
  • quick-connect speaker connectors
  • preamp-level inputs and outputs
  • MOSFET power and output stages
  • CEA-2006 compliant
  • optional RUX-KNOB.2 wired remote level control
  • fuse rating: 25A x 4
  • 4-gauge amp wiring kit with 100-amp fuse recommended — wiring and hardware not included with amplifier
  • 10-1/8"W x 2"H x 8-5/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # PDX-M12

What's in the box:

  • Monoblock class-D amplifier (with four 25A ATO fuses inserted in chassis)
  • Battery connector plug
  • Speaker connector plug
  • 2 Stacking plates
  • Four M3 x 7mm machine screws
  • Four M4 x 24mm machine screws
  • Four M4 x 36mm self-tapping screws
  • 2 Hex-keys (Small/Large)
  • Owner's Manual (Eng/Fre/Spa)
  • Verification Certificate
  • Limited Warranty Card
  • Customer Care Registration Card

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Alpine PDX-M12 reviews

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Features
Controls
Connections

Features

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, clear output.

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 automatically.

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.

Controls

Hidden Controls: 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 8.0V.

Subsonic Filter: 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).

Connections

Terminal Layout: For wiring convenience, all of the inputs and outputs on the amplifier are on one side.

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 a quick 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.

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Customer Q&A

4 questions already asked

Q
Is the pdx M12 and pdx F4 stackable?
[ Kevin  Mar 17, 2017 ]
1 answer
A
Yes, the Alpine PDX series amplifiers (including the M12 and F4) are all stackable in order to save space in the trunk while directly coupling the amps heatsinks to help share cooling duties. If you would like to discuss further, feel free to contact an Advisor directly by phone (1-800-324-9695) or online chat. Hope that helps!
[ Larry  Mar 28, 2017 ]  Staff
Q
How does the AMP manage to distribute the same amount of power RMS at both the 2 Ohm and 4 Ohm resistance?
[ Estyven  Jun 14, 2016 ]
1 answer
A
It's designed by Alpine specifically for this purpose to maximize it's capability regardless of the load you present (within the acceptable range of 2 to 4 Ohms): "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 automatically." You will find this information, and more, by clicking the "Details" tab on the amplifier's main webpage and scrolling down below the "Features & Specs" table. I hope that helps. My Bio: http://www.crutchfield.com/Support/Bio.aspx?bio=5
[ Ryan  Jun 16, 2016 ]  Staff
Q
if i get 2 alpine type s 12 dual 2 ohm will the mrx-m110 amp be plenty of power?
[ rinat  Nov 30, 2015 ]
3 answers
A
oh yea
[ Joshua  Dec 18, 2015 ]
A
absolutely. I have 2 10" alpine type R dual 4 ohm and it kicks
[ Scott  Dec 02, 2015 ]
A
Wired to run at 2 ohm the amp has 1100 what's so it's able to push two speakers that can handle 500 watts rms.
[ Timothy  Dec 02, 2015 ]
Q
Can this amp handle 2 15s that put out 1000 watts each?
[ Kimothy  Dec 04, 2014 ]
1 answer
A
Thanks for your question. For information on selecting the best amp for your subs I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
[ Krissy  Dec 05, 2014 ]  Staff

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