Focal IMPULSE 4.320 Compact 4-Channel Class D Amplifier (IMPULSE4320)

Focal IMPULSE 4.320 Compact 4-Channel Class D Amplifier (IMPULSE4320)

Bring Your Sound System Back to Life

The Focal IMPULSE 4.320 is built to solve a common problem—your factory or aftermarket head unit just doesn’t deliver enough power. Push the volume too far, and things start to fall apart. Sound gets muddy, dynamics fade, and the music loses its edge. That’s where this compact amplifier steps in. It gives your system the boost it needs so your speakers can finally perform the way they were meant to.

Compact Size, Serious Power

Don’t let the small footprint fool you. This ultra-compact 4-channel Class D amplifier delivers 4 x 55 watts RMS at 4 ohms, giving your system a noticeable upgrade in clarity and volume. Need more flexibility? It can handle up to 4 x 80 watts at 2 ohms or be bridged to deliver 2 x 160 watts at 4 ohms. Think of it like swapping out a small engine for something with real horsepower—same setup, completely different performance.

Designed for Simplicity

The Focal IMPULSE 4.320 keeps things straightforward with a semi plug-and-play design. It’s ISO compatible and works with both OEM and aftermarket head units. With automatic start-up tied to your original system, you won’t need to fuss with extra steps. The included wiring harness and detachable mounting brackets make integration clean and efficient.

Clean, Controlled Sound

This amplifier doesn’t just make things louder—it makes them better. With a wide frequency response from 10Hz to 20kHz, low distortion at just 0.02%, and an SNR above 80dB, your music stays clear and detailed. Built-in crossovers and adjustable phase controls help fine-tune your setup, while dedicated subwoofer compatibility settings give you more control over low-end performance.

Built to Work with Your System

The Focal IMPULSE 4.320 is a perfect match for Focal Integration speakers, but it’s also flexible enough to work with a wide range of setups. Mirror mode, full-range capability, and bridgeable channels mean you can shape your system exactly how you want it. Whether you’re upgrading a basic setup or refining an existing one, this amp adapts easily.

Reliable and Protected

Durability matters, especially in a compact design. This amplifier includes protection against short circuits, low impedance, reverse polarity, DC issues, voltage drops, and overheating. It’s engineered to keep running smoothly, even when pushed.

Technical Specifications

• Class D, 4-channel amplifier
• Power Output (4Ω): 4 x 55W RMS
• Power Output (2Ω): 4 x 80W RMS
• Bridged Power (4Ω): 2 x 160W RMS
• Frequency Response: 10Hz – 20kHz
• Compact Size: 175 x 66.5 x 47 mm
• Weight: 0.55 kg (1.2 lbs)

Why It’s Worth It

If your current system feels like it’s holding back, the Focal IMPULSE 4.320 is a simple way to fix that. It doesn’t require a complete overhaul—just a smart upgrade. More power, better clarity, and tighter control all come in a compact package that fits almost anywhere. Sometimes, a small change makes the biggest difference.

FAQs

1. What type of amplifier is the Focal IMPULSE 4.320? It’s a compact 4-channel Class D digital amplifier designed for efficient power and minimal space usage.
2. How much power does the Focal IMPULSE 4.320 deliver? It provides 4 x 55W RMS at 4 ohms, 4 x 80W at 2 ohms, and can be bridged to 2 x 160W at 4 ohms.
3. Is the Focal IMPULSE 4.320 compatible with factory head units? Yes, it works with both OEM and aftermarket head units and supports automatic start-up with factory systems.
4. Does the amplifier support subwoofer setups? Yes, it includes dedicated subwoofer compatibility settings along with adjustable crossover options.
5. What makes this amplifier easy to integrate into a system? Its ultra-compact size, ISO compatibility, included wiring harness, and detachable mounting brackets make it simple to add to most setups.