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Ignitions and Electrical› Ignition Boxes and Components

Alpine

4-Channel Class D Car Amplifier

$409.99 $349.99 Save $60.00

SKU: PDR-F50

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In Stock
Ships by Sep 13
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30 Days Return
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Moderate — 2–4 hours

Overview

The Alpine PDR-F50 is a 4-channel Class D car amplifier designed to offer high performance in a compact size.

This amplifier delivers 85 watts RMS x 4 channels at 4 ohms, 125 watts RMS x 4 channels at 2 ohms, and can be bridged to 250 watts RMS x 2 channels at 4 ohms. It features speaker-level inputs with signal sensing for automatic turn-on, as well as variable high-pass and low-pass filters adjustable from 50-400 Hz.

It also includes thermal and current protection circuitry, a variable bass boost, and 4/3/2 channel operation capability. The compact dimensions are 9"W x 7.12"L x 2.8"H.
Show original supplier description
The Alpine PDR-F50 is a 4-channel Class D car amplifier that redefines expectations in the high-power, compact amplifier category. It incorporates trickle-down technology from Alpine's leading PDX series to provide wide bandwidth, excellent signal-to-noise ratio, low distortion, and a high damping factor. This amplifier boasts impressive power output: 85 watts RMS x 4 channels into 4 ohms, 125 watts RMS x 4 channels into 2 ohms, and 250 watts RMS x 2 channels when bridged into 4 ohms. It supports 4/3/2 channel operation and features speaker-level (high-level) inputs with signal sensing for automatic turn-on, making it versatile for integration with factory or aftermarket systems. For precise tuning, the PDR-F50 includes variable crossovers for both high-pass and low-pass filters, adjustable from 50Hz to 400Hz with a 24 dB/octave slope. It also offers a variable bass boost feature, allowing for 0 to +12 dB boost. Built-in thermal and current protection circuits safeguard the amplifier. With its compact dimensions of 9"W x 7.12"L x 2.8"H, the PDR-F50 is designed for easy installation in various locations. Alpine emphasizes that all PDR-Power amplifiers are individually tested and have certified power ratings, with each unit coming with a verification certificate confirming its actual power output exceeds the stated rating.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

BrandAlpine
Part NumberPDR-F50
CategoryIgnitions and Electrical
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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