【Focal FPX 4.800｜A Compact 4-Channel Power Amplifier for High Output】

You want the sound from your factory audio to have a bit more punch and thickness. But if you’re adding an amplifier, you’d probably prefer one that doesn’t take up too much space in the cabin.

That’s where the Focal FPX 4.800 comes in—it’s an easy option to consider.

This compact 4-channel power amplifier features a rated output of 120W × 4ch at 4Ω, housed in a body measuring approximately 13cm wide and 23cm deep. By driving your speakers properly, you’ll not only get more headroom when you turn up the volume, but you’ll also find it easier to perceive vocal and instrument definition, as well as the overall thickness of the sound.

Of course, you can use all four channels for the speakers. You can also choose to combine front speakers and a subwoofer by taking advantage of the high output of 370W × 2ch via bridged connection. From people who want to drive the front speakers firmly to those who want to tune the entire system—including low frequencies—this is an amplifier that makes system configuration easy.

Each pair of channels is equipped with high-pass and low-pass filters adjustable from 50Hz to 500Hz. By separating the roles of the speakers and the subwoofer, you can move toward a balance that’s easy to listen to inside the car. It also includes a bass boost, but it’s important not to simply add more bass—use it while considering compatibility with your vehicle and speakers.

An amplifier doesn’t produce the same sound just because you install it. The final impression changes depending on power and wiring treatment, installation method, speaker combinations, and adjustments to gain and crossover.

If it were me, I’d first confirm your current audio setup and what you’re unhappy with in the sound, then decide how to use the 4ch. Will you drive the front 2-way system strongly? Configure all four channels including the rear? Or combine with a subwoofer? Let’s整理 a configuration that can make the most of the output of the Focal FPX 4.800, matched to your vehicle and how you use it.

Main Specifications

【Basic Information】

• Product name: Focal FPX 4.800
• Type: 4-channel power amplifier
• Amplifier type: Class D

【Rated Output (CEA compliant)】

• 4Ω: 120W × 4ch (RMS)
• 2Ω: 185W × 4ch (RMS)
• Bridged connection (4Ω): 370W × 2ch (RMS)

【Performance】

• Frequency response: 10Hz to 20kHz
• Total harmonic distortion (THD): 0.01%
• Signal-to-noise ratio (S/N): 76dB or higher

【Adjustment Functions】

• High-pass filter: Variable, 50Hz to 500Hz
• Low-pass filter: Variable, 50Hz to 500Hz
• Bass boost: 0 to 12dB
• Bass boost center frequency: 53Hz
• Protection function: Included

【Dimensions】

• Width: Approx. 13cm
• Depth: Approx. 23cm