KICKER CXA660.5 5-Channel 660W Car Audio Amplifier | 90W x 4 + 300W Subwoofer

One Amplifier. Your Entire Sound System.

Build a complete, powerful car audio system with the KICKER CXA660.5 CX-Series 5-Channel Amplifier.

Instead of installing separate amplifiers for your speakers and subwoofer, the CXA660.5 combines both into a single compact chassis.

The amplifier uses Class A/B technology for four full-range speaker channels and an efficient Class-D power plant for the dedicated subwoofer channel. It delivers up to 90 watts RMS x 4 at 2 ohms for your main speakers plus 300 watts RMS x 1 at 2 ohms for your subwoofer.

That makes the CXA660.5 an excellent choice for customers who want a complete amplified system without taking up the space, wiring complexity, and installation time of two separate amplifiers.

KICKER's FIT+™ factory-integration technology also allows the CXA660.5 to accept high-level signals up to 40 volts, making it an excellent solution for upgrading factory-radio systems.

Why You'll Love It

✔ 5-Channel Amplifier

✔ Four Class A/B Full-Range Channels

✔ Dedicated Class-D Subwoofer Channel

✔ 90W RMS x 4 @ 2 Ohms

✔ 65W RMS x 4 @ 4 Ohms

✔ 300W RMS x 1 @ 2 Ohms Sub Channel

✔ 150W RMS x 1 @ 4 Ohms Sub Channel

✔ 180W RMS x 2 @ 4 Ohms Bridged

✔ FIT+™ Factory-Radio Integration

✔ Up to 40V Speaker-Level Input

✔ Variable High-Pass Crossovers

✔ Variable Subwoofer Low-Pass Crossover

✔ 25Hz Subsonic Filter

✔ KickEQ™ 0–6dB Bass Boost @ 40Hz

✔ CXARC Remote Bass Control Compatible

✔ Compact Single-Amp System Design

✔ Vertical Mounting Hardware Included

✔ Three-Second Turn-On/Off Delay

✔ Two-Year KICKER Warranty When Purchased from an Authorized Dealer

The Complete System Amplifier

The CXA660.5 is designed for customers who want to amplify their entire vehicle audio system with one amplifier.

You get:

Channels 1–4 → Front and rear speakers

Channel 5 → Subwoofer

That's it.

One amplifier handles the entire system.

This can make the CXA660.5 an especially attractive option for:

• Truck audio systems
• SUV audio systems
• Daily-driver upgrades
• Factory-radio upgrades
• Complete speaker upgrades
• Speaker + subwoofer packages
• Compact amplifier installations
• Custom audio builds

Four Channels of Speaker Power

The first four channels use Class A/B amplification to power the vehicle's full-range speakers.

4 Ohms

65W RMS x 4

2 Ohms

90W RMS x 4

This gives you enough power for a wide variety of aftermarket coaxial and component speakers.

A typical system can be configured:

Channels 1–2 → Front speakers

Channels 3–4 → Rear speakers

This provides dedicated amplifier power to all four main speaker locations.

300 Watts for Your Subwoofer

The fifth channel is a dedicated Class-D mono subwoofer channel.

4 Ohms

150W RMS x 1

2 Ohms

300W RMS x 1

This gives the CXA660.5 enough subwoofer power to complement a moderate-power aftermarket subwoofer while keeping the entire system on a single amplifier.

Why a 5-Channel Amplifier Makes Sense

A traditional complete system might require:

4-channel amplifier + mono amplifier

That means:

• Two amplifier chassis
• Two sets of amplifier mounting
• More wiring
• More installation space
• More installation time
• More system complexity

The CXA660.5 combines those functions into one amplifier.

One amplifier

4 speaker channels + 1 subwoofer channel

It's an excellent solution when clean installation and space efficiency are priorities.

The Perfect “Complete System” Amplifier

For a customer upgrading their entire vehicle audio system, the CXA660.5 makes the installation extremely straightforward.

Example System

Front: 6.5" aftermarket coaxial/component speakers

Rear: 6.5", 6x8", 5x7" or 6x9" speakers

Subwoofer: Single 10" or 12" subwoofer

Amplifier: KICKER CXA660.5

This creates a complete amplified system without requiring separate speaker and subwoofer amplifiers.

90 Watts x 4 at 2 Ohms

The full-range channels produce:

90W RMS x 4 @ 2Ω

This makes the CXA660.5 particularly attractive for lower-impedance aftermarket speakers or systems where additional speaker power is desired.

At 4 ohms, the amplifier provides:

65W RMS x 4

Both ratings provide plenty of flexibility when matching the amplifier to aftermarket speakers.

180 Watts x 2 Bridged

The full-range channels can also be configured for bridged operation.

KICKER specifies:

180W RMS x 2 @ 4Ω bridged

This gives installers another way to configure the amplifier when a specialized system design calls for additional power on two full-range channels.

Always verify speaker impedance and amplifier configuration before using bridged channels.

Dedicated Class-D Subwoofer Channel

While the four full-range channels use Class A/B amplification, the subwoofer channel uses an efficient Class-D design.

This is an ideal architecture for a 5-channel amplifier:

Class A/B → Full-range speakers

Class D → Subwoofer

The result is a single amplifier capable of powering the entire audio system while using an efficient dedicated design for the bass channel.

Factory-Radio Integration

The CXA660.5 includes KICKER's FIT+™ Fail-safe Integration Technology-PLUS.

It accepts both low-level and high-level signals, with high-level input capability up to:

40 volts

This makes it compatible with a wide variety of factory and aftermarket source units.

For many factory-radio installations, this means you can add substantial amplifier power without replacing the OEM radio.

Up to 40V Speaker-Level Input

The CXA660.5 accepts:

Low-Level Input: 125mV–5V

High-Level Input: 1V–40V

That high-level input capability is particularly useful for modern vehicles where the factory radio or amplifier may produce higher speaker-level signal voltages.

Built-In Crossover Controls

The CXA660.5 provides independent crossover functionality for the full-range and subwoofer sections.

Full-Range Channels

High-pass filter:

10–200Hz

12dB/octave

Subwoofer Channel

Low-pass filter:

50–200Hz

12dB/octave

This allows you to properly separate the frequency ranges going to the speakers and subwoofer.

25Hz Subsonic Filter

The dedicated subwoofer channel includes a:

25Hz subsonic filter

with a steep:

24dB/octave slope

This helps reduce extremely low-frequency content that can cause excessive subwoofer excursion without contributing useful audible output.

This feature is particularly useful with certain ported enclosure designs.

KickEQ™ Bass Boost

The CXA660.5 includes KICKER's KickEQ™ variable bass boost.

Adjustment range:

0–6dB @ 40Hz

This provides additional control over the low-frequency response of the subwoofer channel.

As with any bass boost, we recommend using it conservatively and setting amplifier gain correctly.

Remote Bass Control

The CXA660.5 is compatible with KICKER's optional CXARC Remote Bass Controller.

This allows the driver to adjust subwoofer output from the front of the vehicle.

It's a particularly useful feature when the system needs quick bass-level adjustment without reaching the amplifier.

One Amp Saves Space

The CXA660.5 measures approximately:

14-1/8" L × 6-3/4" W × 2-3/8" H

For a five-channel amplifier capable of powering an entire system, that's a relatively compact footprint.

This can be particularly useful in:

• Pickup trucks
• SUVs
• Extended-cab trucks
• Under-seat installations
• Trunks
• Side panels
• Custom amp racks

KICKER also includes vertical mounting hardware for additional installation flexibility.