Alpine Authorized Online Dealer

Cool and Compact Amps

Sometimes size doesn't matter. Alpine packs Class-D amplifier technology into their PDX amplifiers for awesome power from a compact frame. These small-but-mighty amps free up valuable space and run so cool they can be stacked together for a sweet multi-amp setup.

stackable up to 3 high

Heavy duty, clean power

The PDX-2.150 2-channel amplifier supplies 150 watts of full-range power to each channel, plenty of power for the most demanding component speaker systems or most subs. Beefy internal components and clever engineering keep the power output strong and the noise low for superb fidelity and control. Adjustable frequency filters tailor the amp's output to your specific system.


High-quality connections

gold-plated connections

Front-mounted controls make post-installation adjustments a snap. Gold-plated RCA inputs and power connections resist corrosion and signal degradation. Nifty speaker wire plugs ensure a tight connection and guarantee that your speakers work in unison.


Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.

Product Highlights:

  • 2-channel car amplifier
  • 150 watts RMS x 2 at 4 ohms (150 watts RMS x 2 at 2 ohms)
  • 300 watts RMS x 1 in bridged mode (4-ohm stable in bridged mode)
  • variable high- and low-pass filters (30-400 Hz, 12 dB/octave)
  • Class-D amplifier design
  • stackable installation design with front-panel controls
  • quick-connect speaker connectors
  • preamp-level inputs
  • MOSFET power and output stages
  • CEA-2006 compliant
  • fuse rating: 15A x 2
  • 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
  • 10-3/16"W x 2-1/2"H x 8-7/8"D
  • warranty: 1 year
  • Our 60-day money-back guarantee

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Hands-on research

What's in the box?

Download owner's manual

  • 2-channel amplifier with two 15-amp blade fuses installed
  • 2 Speaker quick connect terminals
  • 4 Joint caps (for stacking multiple amps)
  • Four 1-1/2" Self-tapping screws
  • Four M4 x 36mm Machine screws
  • Eight M2.6 x 14mm Machine screws (with lock washers attached)
  • 2mm Allen wrench
  • 4mm Allen wrench
  • Owners Manual (English/French/Spanish)
  • Customer Care Registration/Survey
  • Warranty sheet
  • Specification verification certificate

Product Research

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 totally new super-efficient power density design of full range class-D amps. They combine MOSFET power supplies, MOSFET final outputs, and a thermal management processor, along with a 4-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.

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

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).

Speaker Connecters: The PDX series amps use a new Speaker Quick Connect plug to attach the speaker wires to the amp. Bare speaker wire, up to 8 gauge, is held in place by a set screw, the Quick Connect plug then plugs into the amp. Like an RCA jack, the Quick Connect plug uses a center positive layout, so it fits two ways and both maintain correct polarity.

Stack Amps: Because the PDX series design generates so little heat, up to three amps can be stacked and bolted together. All three amps in the series, PDX-2.150, PDX-4.150, and PDX-1.1000 share the same footprint, so they can be stacked together.

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/Status indicator glows blue when operating normally and red when one of the protection circuits engages.

Protection Circuits: This amplifier includes protection circuits to prevent damage due to the following conditions:

  • ambient temperature too high
  • supply current too high
  • short to ground
  • over voltage

Controls

Controls (front of unit): Once set, the controls are covered by a door.

  • Crossover Mode switch: set to HP (high pass), OFF (full range) or LP (low-pass)
  • Crossover Frequency: rotary control used to select the crossover frequency, variable from 30 to 400Hz
  • Gain control: rotary control used to set the amplifier's gain according the level of the incoming signal, continuously variable from 0.2V to 4.0V

Connections

Inputs and Outputs (rear of unit):

  • Power and Ground terminals: power and ground terminals are gold plated set screw terminals, will accept up to 4 gauge bare wire, Alpine recommends 6 gauge wire minimum
  • Remote Turn-on terminal: gold plated set screw terminal, will accept up to 10 gauge bare wire
  • Speaker terminals: each speaker output uses Alpine's Speaker Quick Connect plug
  • Line Level Input: Left and right female RCA jacks, gold plated

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Alpine PDX-2.150 Reviews

Average Customer Review:

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Best sound and size for value

Written By Chris, Madison, WI on Saturday, September 27, 2008

I have gone through 5 2-channel amplifiers (from other manufacturers)
before finding this perfect little package. I switched to the PDX when I
needed compact amps for my tiny Solstice - The PDX 2.150 was the perfect
match for my pair of JL 8W3 subs. I've since switched vehicles and now my
PDX 2.150 drives my JL TW5. The reproduction is fantastic - very punchy
and clean with smaller subs, still hard hitting and low with the big subs. The
power handling is great - I haven't needed any capacitor since switching to
PDX amps. The best design feature is all the PDX amps are stackable
because they're all the same size - and they're completely secure when
stacked (they don't wiggle one millimeter). The speaker wire connection are
really nice - you don't have to worry about wires coming loose or freying
and shorting. I can't imagine using any other amps than the PDX series.

Get everything you’ll need to enjoy your new Alpine PDX-2.150

You'll need an amp wiring kit to install your new amplifier, as wiring is not included.
Bring the music from your amp to your speakers.
Patch cables take the music from your stereo to the amplifier. Most amp wiring kits don't include them.
Helps protect your car's charging system and improves power handling. Required power and ground wires not included with cap.
The right tools will make the installation easier.
Have your new amplifier put in by a qualified professional in your area.
Rockford Fosgate RFK4

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EFX PA4BX Wiring Kit

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T-Spec 16-gauge Speaker Wire

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T-Spec Capacitor

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Install Bay 3320

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