Alpine PSU-300CVC Powered System Upgrade for 2016-Up Honda Civic 4-Door

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Alpine PSU-300CVC Powered System Upgrade for 2016-Up Honda Civic 4-Door

  • Alpine KTP-445U Power Pack 4-channel amplifier
  • 45 watts RMS x 4 at 2 or 4 ohms
  • Alpine PWE-S8 compact powered subwoofer
  • 8″ woofer
  • 120 watts RMS amplifier

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SKU: PSU300CVC Categories: ,

Frequently Bought Together

Alpine PSU-300CVC+Alpine iLX-207+
Price for all three:   $2,234.99

Product Description

Alpine PSU-300CVC Powered System Upgrade for 2016-Up Honda Civic 4-Door

Alpine PSU-300CVC is a dedicated 300 watt sound system designed specifically for 2016 – Up Honda Civic 4-Door LX, EX, EX-T, and EX-L models (excludes Touring models) not equipped with a factory premium amplified sound system.

The system includes a KTP-445U 4 x 45 watt amplifier, a PWE-S8 8″ powered subwoofer, and all the wiring needed, pre-loomed and ready to install. Alpine PSU-300CVC also includes a remote bass knob for changing the bass level from the dash.


Alpine PSU-300CVC system can be interfaced with a factory radio (non-amplified) or an aftermarket radio. The included T-harness interfaces the factory wiring in the dash, providing either a speaker-level signal from a factory radio or an RCA line-level signal from an aftermarket radio, to feed to the Alpine KTP-445U amplifier.

The T-harness also feeds the amplified return signal back into the factory wiring and out to each of the speakers, utilizing the factory speaker wires. The provided wiring includes a 10 ga. power wire, with inline fuse holder, that gets run to the battery, providing power for both the 4-channel amp and the PWE-S8 subwoofer.


Alpine provides pre-attached brackets that are designed specifically to mount both the KTP-445U amp and the PWE-S8 subwoofer underneath the passenger front seat. This means no usable space in the vehicle is taken up by the sound system.


The Alpine KTP-445U Head Unit Power Pack is a power upgrade amplifier that allows you to add higher output and more dynamic response to your aftermarket or factory installed car stereo system (without factory amplifiers).

The Power Pack employs a 45 watt x 4 channel amplifier with an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result is a 1 Watt Signal-to-Noise Ratio of 82dB or better.

Uniquely, the amplifier distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion (< 0.03% THD+N @ 1W; 1% THD+N @ rated power). The Alpine KTP-445U Head Unit Power Pack provides independent controls for the Front & Rear inputs.

Front & Rear Gains:

The Power Pack provides simple variable gain controls (speaker level: 0.5-10V, low-level: 0.2-4V) for flexibility and a wide variety of system applications.

Front & Rear HPF:

High-Pass selectable switches for the amplifier’s Front & Rear inputs allow frequency filtering for a wide variety of speakers. Choose “Full-Range” or a selectable range (60Hz, 80Hz, 120Hz) to fine-tune your crossover points (-12dB/oct.).

Configurable Inputs:

On the bottom panel of the Power Pack there are selectable input options to accommodate Speaker-Level (0.5V-10V) or RCA (0.2V-4V) inputs.

4Ch/2Ch Modes:

Selectable 2-Channel & 4-Channel options give you the control to determine source inputs, and can eliminate the need for Y-adapters.


The Alpine PWE-S8 is a compact self-amplified subwoofer with pre-installed brackets that allow it to fit underneath the passenger’s front seat, keeping it out of sight. The PWE-S8 includes a built-in 120 watt Class D amp along with an 8″ high-excursion subwoofer.

It can accept either line- or speaker-level inputs and features an Auto Turn-on circuit that will activate the amp when it senses a signal on the speaker-level inputs. An included wired remote lets you easily adjust the bass level from the front seating area.

The control can be mounted under a dash panel and gives you a level range from 0 to -20 dB, relative to the gain setting on the amplifier. Controls on the subwoofer include:


Can vary the input level from 0.2 – 4.0 volts line-level and 0.5 – 10 volts speaker-level.

Low Pass Filter:

Rotary control that can set the filter cutoff between 50 – 150 Hz.


Switches between 0˚ and 180˚.

Power Mode:

Switches between SP IN (speaker-level input) and REM (wired remote input).

Additional Information


– PWE-S8 Powered sub and attached KTP-445U 4-ch amplifier w/ integrated brackets
– 7′ Main harness
– 12′ Loomed power cable (inline 20A fuse)
– 9″ T-harness
– Four 10″ speaker-RCA harnesses
– Remote bass knob w/ 16′ cord
– 2.5″ Strip of hook-and-loop fastener
– Ten 6″ wire-ties
– One 1/2″ self-tapping pan-head screw
– 1 Star-washer
– Installation guide
– Warranty sheet
– Alpine Technical Support contact sheet

Mobile Amplifier Channels

4 Channel

Mobile Amplifier Class

Class D

Mobile Amplifier Fuse Rating


Mobile Amplifier RMS

101 to 150 watts

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