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Mobile Electronics› Vehicle Audio and Components

Alpine

45W x 4 Channel Class-D Amplifier

$410.00 $320.05 Save $89.95

SKU: KTP-445A

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$100 Minimum Order
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INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The Alpine KTP-445A is a 4-channel Class-D amplifier designed to boost the power output of select Alpine head units. It provides 45 watts RMS per channel at 2 ohms, delivering a significant upgrade over factory head unit power.

It offers improved audio quality with reduced distortion, especially at higher frequencies, ensuring a pure listening experience.
Show original supplier description
The Alpine KTP-445A Power Pack is a compact, 4-channel Class-D amplifier designed to significantly enhance the audio output of compatible Alpine head units. This upgrade results in louder, cleaner, and more responsive audio. Engineered for superior sound quality, the KTP-445A boasts an exceptionally low noise floor and a meticulously clean signal path to eliminate interference, resulting in an 82 dB or better Signal-to-Noise Ratio at 1-Watt. It also features ultra-low distortion, with THD+N less than 0.03% at 1W and only 1% at its rated power, ensuring a crystal-clear and distortion-free listening experience across the entire audio spectrum. Its standout feature is its compact design, measuring just 7-7/16” x 1-1/2” x 2-1/2”, which allows it to fit in tight spaces, often behind the dash, making installation quick and easy. The amplifier is equipped with direct plug-in connectors for select 2005 and newer Alpine head units, simplifying the installation process without requiring large power cables.

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.

Fitment

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Specifications

BrandAlpine
Part NumberKTP-445A
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

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