This is the Focal Impulse 4.320 4 Channel Amplifier.
With more than 50 brands and 1,000 vehicle models covered, the Focal Inside range offers tailor-made configurations ensuring perfect compatibility.
Replace your vehicle’s audio system easily without modifying the interior by choosing a Plug & Play hi‑fi solution.
Add amplification and subwoofers for a richer sound experience and impactful bass.
Why the Focal Inside Impulse 4.320 is the Micro-Amplifier Benchmark:
Microscopic Footprint & Hidden Mounting: This is the primary "Information Gain." Measuring an incredibly slim 6-15/16" x 1-7/8" x 2-5/8", this amplifier completely bypasses the need to run thick power cables down to your trunk or beneath the seats. Its micro-chassis is small enough to hide directly behind the factory dashboard screen or inside the center console panel, drastically shortening wire paths.
Efficient Class D Technology Architecture: Derived directly from Focal's high-tier Performance Series, the Impulse 4.320 features an electrical efficiency rating exceeding 90%. This prevents the unit from producing intense heat, meaning it can live safely in cramped dashboard voids while keeping power draw low enough that it doesn't require a direct-to-battery wiring run in short-run installations.
High-Level Sensing & Automatic Turn-On: You do not need an aftermarket receiver or a manual 12-volt accessory trigger to enjoy audiophile sound. Equipped with advanced signal-sensing high-level speaker inputs, the amp taps directly into your factory wiring loom and awakens automatically the exact split-second your radio turns on.
Dynamic 4/3/2 Channel Configuration Setup: The internal layout is incredibly adaptive. Run it in 4-channel mode to supply 55 Watts RMS to your front and rear doors, or shift it into 3-channel mode to push 55 Watts RMS x 2 to your front components while bridging the rear channels to push a clean 160 Watts RMS to a small, space-saving subwoofer setup.
Precision Built-In Crossover Tuning: Tailoring the acoustic response to your exact speaker diameters is easy. The front channels feature a switchable 75Hz high-pass filter to prevent small door speakers from distorting on heavy bass notes. The rear channels include a fully adjustable 40-200Hz high/low-pass filter matrix combined with an integrated progressive phase selector (0-180°) to perfectly time-align sub-bass frequencies.
