【46CXA4001（CXA400.1）1ch Power Amplifier｜Efficient power use to drive your subwoofer properly】

You may want to add a subwoofer, but you’re concerned about the amplifier’s size, heat generation, and how it connects to the factory audio system. If so, consider the 46CXA4001（CXA400.1）.

This is a monaural power amplifier designed to deliver rated output of 400W at 1Ω, 300W at 2Ω, and 150W at 4Ω, providing the low frequencies your subwoofer needs. Its power-saving design and efficient heat sink are also key features—its compact size makes it easier to install even in limited in-car space.

When the low end gains thickness—not only when you turn the volume up, but also at the volume level you normally listen at—the musical foundation that’s hard to bring out with front speakers alone becomes more noticeable. It’s ideal if you want to add presence to the bass and kick, and it’s also suited for those aiming for a sound that naturally ties together across the entire vehicle—rather than a finish where only the low bass stands out.

With the separately sold CXARC, you can adjust the bass level right from the driver’s seat. If you want to change the amount of low-end punch depending on the track or your mood, this kind of operability is a convenient point.

Even when you want to build your system while keeping the factory audio, FIT+™ supports connections to a wide range of audio systems, including factory setups. However, the actual connection method and amplifier settings will vary depending on the vehicle model, the specifications of the factory audio system, and the subwoofer you pair it with.

An amplifier isn’t something that’s finished once it’s installed. Depending on how you route the power and signals, the installation method, and the adjustments to the crossover and low-end boost, the overall impression of the same product can change. If it were me, I’d first check your vehicle’s factory audio and your current speaker configuration, ask how much low end you want to add, and then come up with a configuration that’s realistic and not overreaching.

If you’re considering adding a subwoofer or improving the bass, please tell us your vehicle model, your current audio setup, and what kind of sound you want. Let’s search together for the just-right solution—including how easy it is to use.

Main Specifications & Features

【Basic Information】
Product name: 46CXA4001
Model indication: CXA400.1
Type: 1ch monaural power amplifier
Channels: Monaural 1ch

【Rated Output】
1Ω: 400W × 1ch (14.4V)
2Ω: 300W × 1ch (14.4V)
4Ω: 150W × 1ch (14.4V)

【Frequency Response】
25Hz to 200Hz

【S/N Ratio】
95dB or higher

【Main Functions】
12dB variable crossover
KickEQ™ 6dB variable low-end boost
24dB subsonic filter
3-second turn-on/off delay function to suppress unwanted interference
FIT+™ (Fail-safe Integration Technology - PLUS)
Bass level control support via separately sold CXARC

【Installation】
Vertical mounting bracket included

【Main Unit Size】
Length 206mm × Depth 170mm × Height 59mm