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Alpine PDX-M12

1200W RMS, PDX Series Monoblock Power Density Digital Amplifier

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List price $900.00

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$549.95

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  • PDX Series 1-Channel Class D Car Amplifier
  • RMS Power Rating (@ 14.4V):
    • 4 ohms: 1200 watts x 1 chan.
    • 2 ohms: 1200 watts x 1 chan.
  • Total RMS output: 1200 watts
  • DC-DC PWM Power supply with STAR circuitry
  • Blue LED power/status indicator conveniently located on the top
  • Discrete pre-amp stage
  • 6-Layer glass epoxy PC board
  • Automatic over-current protection system
  • Soft start turn-on prevent initial system popping
  • 1-Channel monoblock operation
  • 1 Set of pre-amp outputs
  • System Protection circuitry keeps the amp running properly
  • Large aluminum alloy heatsink for extreme heat dissipation
  • Gold-plated RCA level inputs
  • Proprietary screw terminals ensure a solid and secure connection
  • Input sensitivity: 0.1-8 V with input level
  • Variable low-pass filter (50-400 Hz, 24 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 5-100,000 Hz
  • Dimensions: 7-9/16"D x 10-1/8"W x 2"H
  • 4-gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits when purchased together with this amplifier.
  • 1-year Sonic Electronix warranty

Alpine products are warranted solely by Sonic Electronix, Inc. under the same period and terms as the original Alpine warranty. Sonic Electronix is not an Authorized Alpine Dealer and Alpine requires all merchandise purchased by Sonic Electronix customers to be returned solely to Sonic Electronix. Alpine products are also covered by our Standard Return Policy for returns on exchanges or refunds within 30 days from the date of purchase.

Product History:

Alpine PDX-M12 thumbnail
(newest, current model)
Alpine PDX-1.1000 thumbnail
(previous model, replaced by Alpine PDX-M12)

Power Specifications - Subwoofer Channel

RMS Power @ 4 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 4 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
1200 watts x 1 channels
RMS Power @ 2 ohms
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
1200 watts x 1 channels
RMS Power @ 1 ohm
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far. If the final impedance of your speaker(s) or subwoofer(s) equals 1 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound. The 5th channel on these particular amplifiers are usually dedicated for driving subwoofers.
Not Stable
Peak Power Output
This form of power rating refers to the maximum amount of power an electronic device can handle or output in an instant without damage. Often times this maximum is achieved during a brief musical burst, such as a drum accent or low bass hit. Some manufacturers display peak power ratings on the face of their products to increase the appeal to consumers. The RMS power rating is more accurate, and we recommend using it for product comparison. This is the peak power output for the amplifier's 5th channel.
Not Specified

Amplifier Specifications

Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.

D
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
1 - Mono
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.

1200 watts
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
4 AWG
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
2 ohms
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Not Bridgeable
THD at Rated RMS Power
The amount of change in harmonic content of the signal as it is amplified. A lower figure indicates less change and a more accurate amp. THD below 0.10% is inaudible.
0.004%
Speaker Level Inputs
Speaker level inputs are commonly referred to as high-level inputs and vice versa. This input type allows you to get your audio signal directly from the speaker wire in your vehicle, instead of using RCA cables. The advantage of this is factory integration, as most stock radios do not have RCA outputs to run amplifiers.
No
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
1 pair
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Low-pass (LP)
Low-Pass Crossover Frequency
The low-pass crossover frequency is typically used for subwoofers. It can be a fixed crossover point or a variable crossover range. A variable low-pass crossover allows you to select a specific crossover point which allows frequencies below the set crossover point to pass, while making frequencies above the set point gently or harshly roll-off, depending on the steepness of the slope.

The steepness of the roll-off slope is measured in dB/octave and refers to the rate of attenuation (lowering of volume) outside their pass bands.

50 - 400 Hz
Signal-to-Noise Ratio
This spec compares the strength of the signal to the level of background noise. A higher value indicates less background noise.
92 dB
Bass/Gain Remote
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Yes
Fan Cooled
A great feature to have if an amp generates a large amount of heat. Cooling fans can help regulate the temperature to prevent the amp from overheating (burning).
No
Fuse Rating
The amperage and the number of fuse(s) an amp requires.
25A x 4 
CEA-2006 Compliant
Amplifiers that have been tested to meet specific standards. When a car amplifier meets these standards, you can be sure that it will be able to produce the amount of power specified by the official CEA-2006 rating. Usually, these rating consist of the following items:
  • RMS Power
  • Signal-to-Noise Ratio

This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.

Yes
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
100%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
5.0
Value
4.8
Features
4.9
Design
5.0
Usability
5.0
MJH

Fullerton, CA

Overall
Durability
Value
Features
Design
Usability
Alpine M-12 worth weight in Gold

November 16, 2014

This amplifier is in a class of it's own. No other amplifier pushes my RF T2 12 like the Alpine M-12. This amplifier never gets hot, has amazing clarity and is easy to tune. I do not want to list the amps that I have used to compare this with but the M-12 wins hands down. The price paid for this amp is worth it's weight in Gold.

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Neil

Dallas, Texas

Overall
Durability
Value
Features
Design
Usability
Great Service and Fast Shipping and Genuine Product

November 13, 2014

I haven't had a chance to install this amplifier yet but this review is solely based on my experience in ordering this product. I was a bit skeptical at first because Sonic wasn't an authorized Alpine dealer but after opening the box, everything looked like it was just shipped from the factory. Andrew was my salesperson and he patiently answered all my questions and followed up with me whenever I left a message regarding shipping or additional questions about the product. The amplifier was delivered to me within 3 days which included free shipping. Add to that, I received a great price as well. What more can you ask for.? I highly recommend these guys and would absolutely buy any electronics products from them again without reservation.

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Will

Palestine, IL

Overall
Durability
Value
Features
Design
Usability
Great Amp

June 14, 2014

Not the most powerful amp I have ever owned but definitely by far the cleanest. A bit pricey for the power but you probably won't find cleaner sound from any other company or amp. Very small and compact easy to hide (if you want to that to this beautiful amp). Made my 2 12's not only pound but very musical. Would recommend to anyone who wants a super clean system.

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itsajeepthing

Canada

Overall
Durability
Value
Features
Design
Usability
super efficient

May 4, 2014

although i didnt buy this amp from sonic, cuz it wasnt in stock when i needed it jus like most items are never in stock when you need them with sonic, i got this and hooked it up to a RF T2412D and this little guy is so powerful and efficient, doesn't heat up, doesn't draw too much current and im still running stock electrical and a optima yellow top, but just to be on the safe side i have a 2 farad RF cap to keep things running smooth, this amp delivers. i would buy it again if i ever need to

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Gustavo

Wyoming

Overall
Durability
Value
Features
Design
Usability
Amazing!!

October 1, 2012

I have had this amp in my truck for almost three years now powering my JL audio W7 and no problems what so ever. I love this amp and i plan to get three more of them.

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Brian

Grenada

Overall
Durability
Value
Features
Design
Usability
A powerhouse, but take your time to set it up right

June 5, 2012

When I first installed this PDX-M12, it sounded a little "thin" compared to my previous 500W Class D amplifier. Turned out that I needed to adjust the gains somewhat. Now it delivers all the clean power that I, or almost anyone, would ever need from a subwoofer amp. And it's small enough to fit below the front seats of most vehicles. Great product.

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KC

Des Plaines, IL

Overall
Durability
Value
Features
Design
Usability
Great little amp.

April 1, 2012

I have had this amp running for a few months now. I upgraded my old pdx 1.1000 to this amp (old is still sweet) There was a noticeable power and sound difference where amps clipped used smd dd1. This amp uses a lot less power, than the old one. Light dimming went away without an extra battery or big 3. I was disappointed by the fact that the mounting holes are in diff spots and had to fix up amp rack to hide holes. Just fyi, these don't stack with the old pdx amps. I'm running two 13w6v2's on this amp, and it barely warms up after a couple hours of working hard. It puts out better sq than old pdx, producing richer bass. This amp is great, but lacks a couple features eg. bass boost. or at least they could include the volume (rux) knob for the price.

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John

Novi, MI

Overall
Durability
Value
Features
Design
Usability
Nice little powerhouse

March 23, 2012

This is the 4th PDX amp I have owned. I have the first gen amps in another vehicle, and was impressed so the new ones are now in my new vehicle. Birth sheet says 1376 watts RMS. They are driving my two 10" Fi SSD woofers very nicely. No problems overheating and nothing to complain about. The stacking feature is fantastic, and they are a nice clean amplifer. 4th order crossovers are great, but that is all you get. Made for power in a small effecient size. No bass boost, phase adjustments or other crap that some of these other manufactures are loading their amplifiers up with.

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Bollard

Australia

Overall
Durability
Value
Features
Design
Usability
Awesome

July 7, 2011

The SHEEEET

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Fortitude253

Seattle, WA.

Overall
Durability
Value
Features
Design
Usability
VERY pleased!

April 6, 2011

I bought the PDX-M12 along with the PDX-F6 and both perform beyond expectations. Driving a pair of 12W6's, sealed; Sharp. Crisp. LOUD. Slight warmth felt after an hr pounding. I'm very pleased with my purchases. There is only one smell better than a new car smell and that's new AMP smell!!

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Darkness

Queen Creek, AZ

Overall
Durability
Value
Features
Design
Usability
AWESOME

April 5, 2011

This amp is worth every penny!! Its powering a JL Audio 10W7 in a ported box. I also have the matching Alpine PDX-F6 great combo and they work beyond expectations.

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Meracle

murphysboro,IL

Overall
Durability
Value
Features
Design
Usability
WOW

March 15, 2011

I just bought this amp to replace the new JL 1000/D that I was pushing my two alpine type r's the newer 1223/D model I have them in a dual slot ported box in an 03 tiburon and this amp slams I can beat on them from one town to the other with this amp and it barely gets toasty I would recommend this amp to anyone who is looking for some serious power.

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B

Hamilton,NJ

Overall
Durability
Value
Features
Design
Usability
POWER,SOUND,SEXY !

December 1, 2010

Bought this amp very happy and please I'm using this amp with 2 12" Alpine Type R in sealed box it SLAM and HARD POUND ! Sound very CLEAN AND CLEAR AND LOUD. BEST AMPLIFIER !

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Accessory Tools and Products

Accessories added

NVX XKIT42 100% OFC True 4 Gauge Wiring Kit with RCA Cables and Speaker Wire

The reviews speak for themselves, this is awesome wire with everything you need!

Your Price $69.99

Stinger SK4641 4 Gauge Wiring Kit

Get a high quality amp kit from Stinger to get the most from your new amp!

Your Price $57.99

Belva BAK42 4 Gauge Amplifier Installation Kit

Great amps need great wire at a great price. This amp kit has everything you need!

Your Price $24.99

NVX XBG3PK 1/0 Gauge OFC Big 3 Upgrade Kit

Comes with everything you need to upgrade your power and ground wire.

Your Price $59.99

Kicker Big 3 Package 1/0 Gauge Big 3 Upgrade Kit

Get all you need including wire cutters to upgrade your power and ground wire.

Your Price $151.99

Belva BBG3KT CCA 1/0 Gauge Big Three Kit

Features everything needed to upgrade factory power and ground wire.

Your Price $39.99

StreetWires FB4

4 AWG / 4 Gauge Firewall Bushing

Your Price $6.95

StreetWires FB0

1/0 Gauge Firewall Bushing

Your Price $6.95

NVX XDBU4 - Top of the Line!

Distribution Block with Two 1/0 or 4 AWG Inputs and Four 4 or 8 AWG Outputs

Your Price $17.99

NVX XIX25 X-Series RCA Interconnect Cable

16.4 ft. of 4-Channel X-Series RCA Cable with Dual Twisted Pair Hyper-Flex Technology

Your Price $18.99

NVX XWS1225 12 AWG Speaker Wire

25 ft. of True 12 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $39.99

NVX XWS1625 16 AWG Speaker Wire

25 ft. of True 16 Gauge 100% Copper EnvyFlex Speaker Cable/Wire

Your Price $13.99

Belva BBSW127 12 AWG Speaker Wire

12 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $14.99

Belva BBSW167 16 AWG Speaker Wire

16 Gauge 7 Meter (23 Ft) Speaker Wire (CCA)

Your Price $12.99

SMD DD-1 Distortion Detector

Set the gain of an audio amplifier quickly and accurately

Your Price $149.99

Scosche SPL Meter SPL1000F

Handheld boomSTICK measures your SPL range from 60 to 135 dB

Your Price $21.99

XIX2025 Strapping RCA

0.25 Meter (0.86 ft) Hyper-Flex RCA cable w/ Serpentine-Cut Nickel Plated Connectors

Your Price $12.99

Browse 3 questions and 3 answers
Hide answersShow all answers | Sort by
will the amp power 2 SWR-10D2's? and if not than which
A shopper on Oct 15, 2014
Best Answer: Hello,

Absolutely, perfect match! You MUST wired in series/parallel to a 2ohm load to achieve a proper match!! Use the link(s) below to see how.

http://www.youtube.com/watch?v=htx0aXmzFmo

http://www.the12volt.com/caraudio/woofer_configurations.asp?Q=2&I=22#results
Reply (1) · Report · Customer SStaff on Oct 15, 2014
· Add Answer · I Have This Question Too (0)
I want to use this amp to power a Jl12w7ae is this too much power, and does anyone know what the peak power of this amp is?
Ahmad K on Sep 21, 2014
Best Answer: Hello,

According to JL Audio, 1200w RMS is too much power for this sub, as it puts it in the 'Warranty Void' area. "Optimum" , according to JL Audio is 750w RMS. Its not uncommon to overpower the 12W7, but obviously its not recommended.

http://www.jlaudio.com/12w7ae-3-car-audio-w7ae-subwoofer-drivers-92115

In regards to the 'Peak Power'; "Peak/Max Power" is a useless figure, and therefore Alpine does not provide one.
Reply · Report · Customer SStaff on Sep 21, 2014
· Add Answer · I Have This Question Too (0)
What would this amp put out @ 3 ohms?
Ahmad K on Sep 18, 2014
Best Answer: Same as it will at 2 or 4 ohms.
Reply · Report · Harry G on Sep 19, 2014
· Add Answer · I Have This Question Too (0)

Product Summary

Manufacturer

Model Number

PDX-M12

UPC

793276301017

Weight

10.00lbs

Internal SKU

pdxm12

Internal Product ID

26278

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: Alpine PDX-M12