Focal Impulse 4.320 – Compact 4-Channel Amplifier
Enhance your vehicle's sound system with the Focal Impulse 4.320 Compact 4-Channel Amplifier, designed to deliver impressive power, exceptional sound clarity and seamless integration into factory or aftermarket audio systems.
Featuring advanced Class D amplifier technology, the Impulse 4.320 delivers 4 × 55W RMS at 4 Ohms, providing clean, dynamic output to improve speaker performance without requiring a bulky amplifier installation.
Its ultra-compact design allows for discreet installation behind the dashboard, beneath seats or within other suitable interior spaces, making it an excellent option for vehicles where installation space is limited.
Compatible with high-level and low-level audio inputs, the Impulse 4.320 can be integrated into a wide range of sound systems, while optional Focal Plug & Play wiring harnesses simplify installation in compatible vehicles.
Key Features
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Compact 4-channel Class D digital amplifier
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4 × 55W RMS at 4 Ohms
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4 × 80W maximum at 2 Ohms
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Bridged output: 2 × 160W RMS at 4 Ohms
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High-level and low-level audio inputs
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Automatic signal detection and turn-on
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Adjustable active crossover settings
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High-efficiency Class D design
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Compatible with selected Focal Plug & Play harnesses
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Compact design for discreet installation
Technical Specifications
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Product Type: Compact 4-Channel Amplifier
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Amplifier Class: D
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Number of Channels: 4
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RMS Power at 4 Ohms: 4 × 55W
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Maximum Power at 2 Ohms: 4 × 80W
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Bridged RMS Power at 4 Ohms: 2 × 160W
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Frequency Response: 10Hz – 20kHz
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Signal-to-Noise Ratio: 80dBA
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Minimum Total Harmonic Distortion: 0.02%
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Amplifier Dimensions: 175 × 66.5 × 47mm
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Amplifier Weight: 550g
Sold individually.
Vehicle-specific wiring harnesses and additional installation accessories may be required. Confirm compatibility before purchasing.
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Focal Impulse 4.320 – Compact 4-Channel Amplifier
Let customers speak for us
Installed a false floor in my Prado 250 gxl 7 seater. Great fit. Easy to install myself. Looks factory fitted. Provides so much more room.
Better than I expected, amazing fit and look.
Paul from Pinjarra WA
Love it. Great quality product.
Fantastic product great quality and looks amazing in my 79 and I can hear my music now
Very happy with the new door trims they look fantastic. New speakers in the front doors sound so much better
Centre console for my Hdj79 came up so mint! Looks like it belongs there from factory besides how nice it is
Very happy with the console its a perfect fit and looks good wiring kit made things simle for me , I thoureouly recomend this product
Absolute master piece, fits so seamlessly. There’s honestly no other product that fits so well and has such quality workmanship. It’s a no brainer
Stoked with the outcome
The doti console is excellent it is a perfect fit and I finaly have somewhere comfortable to rest my arm when I’m driving it was well worth the exspence very happy.
The Prado Rear Seat Delete platform is very well built an I would highly recommend to others !
I have brought many products from this company over the years, mostly from third party suppliers like ARB or TJM & having them fitted by the same company
When it came time to build my new 79 series I already knew what I wanted & where I was going to purchase it
As always the quality of the product is faultless and fitment of my centre console, roof console , door trims & speaker pods was very simple
The improvement to the comfort of the car is extremely impressive & functional
Department of The Interior has remained at the top of the league with their products for the facelift series 79
Brilliant. It just fits! Easy to install. Beautiful finish. Skip the rest and get this.
Ordered the premium floor console with scan gauge for my 2024 troopy, excellent fit and build quality is top notch! Should’ve come like this from factory
Quality product. The front mounting doesn't line up easy enough. Hole needs to be in a different position
Exactly as described, fits and works perfectly