46CXA4001T KICKER CXA Series 400W Mono Class D Subwoofer Amplifier 1-Ohm

KICKER CXA400.1 400W 1-Ohm Mono Class D Subwoofer Amplifier | CXA Series

Compact Size. Serious Bass Power.

Give your subwoofer system the clean, controlled power it needs with the KICKER CXA400.1 CX-Series Mono Class-D Subwoofer Amplifier.

Designed specifically for bass applications, the CXA400.1 delivers up to 400 watts RMS x 1 channel at 1 ohm, while also providing 300 watts RMS at 2 ohms and 150 watts RMS at 4 ohms.

That flexible power output makes the CXA400.1 an excellent match for a wide variety of single-subwoofer and multi-voice-coil subwoofer configurations.

Its compact chassis makes it easy to install in tight spaces, while KICKER's FIT+™ Fail-safe Integration Technology-PLUS allows the amplifier to accept both traditional RCA signals and high-level speaker inputs from many factory radios.

Add the variable low-pass crossover, 24dB subsonic filter, KickEQ™ bass boost, RCA pass-through outputs, and optional remote bass control, and the CXA400.1 becomes a versatile foundation for a clean, powerful subwoofer system.

Why You'll Love It

✔ 400W RMS x 1 @ 1 Ohm

✔ 300W RMS x 1 @ 2 Ohms

✔ 150W RMS x 1 @ 4 Ohms

✔ Efficient Class-D Design

✔ 1-Ohm Stable

✔ FIT+™ Factory-Radio Integration

✔ Accepts Up to 40V Speaker-Level Input

✔ Variable 50–200Hz Low-Pass Crossover

✔ 24dB/Octave Subsonic Filter

✔ KickEQ™ Variable 0–6dB Bass Boost

✔ RCA Pass-Through Outputs

✔ Optional Remote Bass Control Compatible

✔ Compact Chassis

✔ Vertical Mounting Hardware Included

✔ Three-Second Turn-On/Off Delay

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

Built for Bass

The CXA400.1 is a dedicated mono subwoofer amplifier, meaning its job is simple:

Deliver clean power to your subwoofer.

Rather than wasting amplifier channels on full-range speakers, the CXA400.1 concentrates its power and processing on the low-frequency portion of your system.

That makes it an excellent choice for:

• Single subwoofer systems
• Loaded subwoofer enclosures
• Compact bass upgrades
• Factory-radio integration
• Aftermarket head-unit systems
• Truck and SUV bass upgrades
• Daily-driver systems
• KICKER subwoofer installations

Up to 400 Watts RMS

The CXA400.1 is rated for different power levels depending on the final speaker impedance.

4 Ohms

150W RMS x 1

2 Ohms

300W RMS x 1

1 Ohm

400W RMS x 1

This makes the amplifier particularly versatile for subwoofers with different voice-coil configurations.

When choosing a subwoofer, always verify the final wired impedance before connecting it to the amplifier.

1-Ohm Stable for Flexible Subwoofer Wiring

One of the biggest advantages of the CXA400.1 is its 1-ohm stability.

This gives you additional flexibility when selecting a subwoofer and configuring single or dual voice coils.

For example, a compatible dual-voice-coil subwoofer may be wired to a final 1-ohm load to take advantage of the amplifier's full 400-watt RMS output.

Always confirm the voice-coil configuration and final impedance before wiring.

Class-D Efficiency

The CXA400.1 uses an efficient Class-D amplifier design.

Class-D amplification is particularly well suited to subwoofer systems because it provides substantial power output while keeping the amplifier relatively compact.

That makes the CXA400.1 a great option for installations where space is limited but the customer still wants meaningful subwoofer power.

Works with Factory Radios

You don't necessarily need an aftermarket radio to use the CXA400.1.

KICKER's FIT+™ Fail-safe Integration Technology-PLUS allows the CX-Series amplifier to work with a wide range of factory and aftermarket audio systems.

The amplifier accepts:

Low-Level RCA Input: 125mV–5V

High-Level Speaker Input: 1V–40V

That high-level input capability can eliminate the need for a separate line-output converter in many installations.

This makes the CXA400.1 particularly attractive for customers who want to add a subwoofer to a modern factory stereo without replacing the vehicle's original radio.

Up to 40V Speaker-Level Input

Modern factory audio systems can produce considerably higher speaker-level signal voltage than traditional aftermarket radios.

The CXA400.1 is designed to accept up to 40 volts of speaker-level input, providing the flexibility needed for many factory-integrated systems.

This is one of the features that separates the CXA400.1 from basic aftermarket amplifiers that require a conventional low-level RCA signal.

Variable Low-Pass Crossover

The built-in low-pass crossover is adjustable from:

50Hz–200Hz

with a 12dB/octave slope.

This allows you to control how high into the frequency range the amplifier sends signal to the subwoofer.

For most systems, the low-pass filter will typically be set somewhere around the upper-bass region and adjusted to blend the subwoofer naturally with the vehicle's main speakers.

24dB Subsonic Filter

The CXA400.1 includes a 24dB/octave subsonic filter fixed at 25Hz.

A subsonic filter helps reduce extremely low-frequency content that may not contribute meaningfully to audible bass but can create unnecessary speaker excursion.

This is particularly useful with ported enclosures, where frequencies below the enclosure's tuning point can place significant stress on the subwoofer.

KickEQ™ Bass Boost

Need a little more low-end impact?

The CXA400.1 includes KickEQ™ variable bass boost, providing:

0–6dB of boost at 40Hz

This allows you to add additional emphasis around the 40Hz region when appropriate for the enclosure and subwoofer being used.

Use bass boost conservatively. Proper enclosure design, subwoofer selection, and amplifier gain are more important to overall bass performance than simply increasing the boost.

Compact Installation Footprint

The CXA400.1 measures approximately:

8-1/8" × 6-3/4" × 2-3/8"

making it considerably easier to install than many larger amplifiers.

Its compact footprint makes it useful for:

• Pickup trucks
• Under-seat installations
• Compact SUVs
• Trunks
• Side panels
• Custom amp racks
• Small subwoofer systems

KICKER also includes hardware for vertical mounting, giving installers another option when conventional flat mounting isn't ideal.

RCA Pass-Through Outputs

The CXA400.1 includes full-range RCA pass-through outputs.

This allows the signal to continue to another compatible amplifier without requiring a separate distribution device in many system configurations.

For example, a system could use the CXA400.1 for the subwoofer while sending the signal onward to a full-range amplifier powering the vehicle's main speakers.

Optional Remote Bass Control

The CXA400.1 is compatible with KICKER's CXARC Remote Bass Controller, sold separately.

With the optional remote installed, you can adjust subwoofer level from the front of the vehicle rather than reaching the amplifier.

This is especially useful when listening to music with significantly different bass content.

Built for Clean, Reliable Operation

KICKER incorporates a three-second turn-on/off delay into the CXA400.1 to help minimize unwanted system interference during startup and shutdown.

The amplifier also uses efficient heat-sink construction to help manage operating temperature during normal use.

Key Features

• KICKER CX-Series CXA400.1
• Model: CXA400.1
• Part Number: 46CXA4001
• Mono Subwoofer Amplifier
• Class-D Power Plant
• 1-Ohm Stable
• 400W RMS x 1 @ 1 Ohm
• 300W RMS x 1 @ 2 Ohms
• 150W RMS x 1 @ 4 Ohms
• FIT+™ Factory-Radio Integration
• Up to 40V Speaker-Level Input
• Variable 50–200Hz Low-Pass Crossover
• 12dB/Octave Low-Pass Slope
• 25Hz 24dB/Octave Subsonic Filter
• KickEQ™ 0–6dB Bass Boost @ 40Hz
• RCA Pass-Through Outputs
• CXARC Remote Bass Compatible
• Three-Second Turn-On/Off Delay
• Compact Chassis
• Vertical Mounting Hardware Included

Specifications