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Alpine PDX-4.100

4-channel car amplifier
100 watts RMS x 4

Item # 500PDX4100

The PDX-4.100 4-channel amplifier supplies a full 100 watts to each channel, plenty of power for even the most...

Find what Fits your car

The PDX-4.100 4-channel amplifier supplies a full 100 watts to each channel, plenty of power for even the most...

Discontinued item

Item # 500PDX4100

About the Alpine PDX-4.100

Cool and Compact Amps

The PDX-4.100 4-channel amplifier supplies a full 100 watts to each channel, plenty of power for even the most demanding component speaker systems. Switch to 2-channel mode, and you can send 200 watts to each of your subwoofers. 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.
Alpine Authorized Online Dealer

Cool and Compact Amps

Sometimes size doesn't matter. You get big power from a little box with Alpine's Power Density Digital Amplifiers. Super-efficient Class-D technology allows these small-but-mighty amplifiers to run so cool they can be stacked together for a sweet multi-amp setup, freeing up valuable space in your car.

stackable up to 3 high

heavy-duty, clean power

The PDX-4.100 4-channel amplifier supplies a full 100 watts to each channel, plenty of power for even the most demanding component speaker systems. Switch to 2-channel mode, and you can send 200 watts to each of your subwoofers. 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

your description here

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 play in unison.

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Product highlights:

  • 4-channel car amplifier
  • 100 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
  • 200 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode)
  • CEA-2006 compliant
  • stackable installation design with front-panel controls
  • variable high- and low-pass filters (30-400 Hz, 12 dB/octave)
  • quick-connect speaker connectors
  • Class-D amplifier design
  • MOSFET power and output stages
  • fuse rating: 30A 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 8-1/2"D
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # PDX-4.100

What's in the box:

  • 4-Channel amplifier
  • Two 30-amp blade fuses (installed)
  • 4 Speaker quick connect terminals
  • Four 1-1/2" Self-tapping screws
  • 2mm Allen wrench
  • 4mm Allen wrench
  • Owners Manual (English/French/Spanish)
  • Customer Care Registration/Survey
  • Warranty sheet
  • Specification verification certificate

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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 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 the amps in the series; PDX-2.150, PDX-4.100, PDX-4.150, PDX-1.600, 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), separate controls for the front and rear channels
  • Crossover Frequency: rotary controls used to select the crossover frequency, separate controls for the front and rear channels, variable from 30 to 400Hz
  • Gain control: rotary controls used to set the amplifier's gain according the level of the incoming signal, separate controls for the front and rear channels, continuously variable from 0.2V to 4.0V
  • Input switch: set to 1+3/2+4 (input 1 and 3 summed to feed channel 3, inputs 2 and 4 summed to feed channel 4, this makes channels 3 and 4 non-fading), 3/4 (channels 3 and 4 fed by inputs 3 and 4, maintains fader when head unit has front and rear line outputs), or 1/2 (channels 3 and 4 fed by inputs 1 and 2, no Y-adapters needed when head unit has only one pair of line outputs)

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 minimum
  • Remote Turn-on terminal: gold plated set screw terminal, will accept up to 10 gauge bare wire
  • Speaker terminals: each of the 4 speaker outputs uses Alpine's Speaker Quick Connect plug
  • Line Level Input: 4 female RCA jacks, left and right for the front and rear channels, gold plated

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