Focal Audiophile and Versatile 4 Channel Car Amplifier - FPX 4.400 SQ

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The FPX 4.400 is a compact 4-channel amplifier. Offering a 4-/3-/2-channel modes, equipped with an active crossover for each pair of channels. The FPX 4.400 is the produces the highest quality sound in the range. This is the ideal amplifier for powering front and rear speaker drivers, or for hi-fi installations with a 2-way kit. The 2-/4-channel input modes ensure compatibility with head units only equipped with a pair output lines. The features of this amplifier ensure you get the best out of your high-end speaker drivers.


  • 4x70 Watts RMS at 4 Ohms
  • 4-/3-/2-channel Class ABD amplifier
  • 2-/4-channel input modes
  • Stable at 2 Ohms
  • Active crossover for each pair of channels
  • The FPX 4.400 measures 12 23⁄64 x 6 57⁄64 x 2 1⁄4 " (314x175x57mm)



For an amplifier to provide high power and musicality, efficiency and heat dissipation are two essential aspects.

In order to optimise these two key aspects, FPX amplifiers have been given a thick aluminium chassis (3/8″ / 9.5 mm for the top, 11/16″ / 17.5 mm for the sides).

The distribution of the components on the motherboard was also carefully researched to optimise the cooling capacity of the chassis.

The careful selection of each Class D component (switching power supply, oversized toroidal transformers and high-quality capacitors) has made it possible to create powerful but compact amps with excellent musicality


  • A powerful and ultra-compact amplifier
  • Perfect for audiophile installations or powerful subwoofer systems
  • Optimised heat dissipation
  • Extremely versatile
  • Remarkable power/performance/price ratio
Audio Specifications
CEA power (4 ohms) 4x70 Watts RMS
Max. power (2 ohms) 4x100 Watts RMS
Max. power (4 ohms bridged)2x200 Watts RMS
Bandwidth (-3dB) 10Hz – 22KHz
THD 0.04%
Crosstalk (1 KHz) > 54dB
SNR (1W/A) > 77dBA
General Features
Subsonic filter -
High-pass/low-pass filter Configurable High-pass/low-pass 40Hz-5000Hz
Full-range functionYes
Mirror mode Yes
Standby current (A) 0.6 A
Protections Short circuit/low impedance/reverse polarity/ DC/voltage drop/overheat protection
Dimensions (LxWxH)12 23⁄64x 6 57⁄64 x 2 1⁄4" , (315x175x57mm)
Weight (kg) 8.16lbs (3.7kg)

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