Alpine PDX-4.100

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