The FPX 4.400 SQ is a very compact 4-channel amplifier with a power of 4 x 70 Watts RMS at 4 Ohms. Offering a 4 or 2-channel mode, stable at 2 Ohms and equipped with an active crossover for each pair of channels, makes the FPX 4.400 SQ very versatile and suitable to a range of system designs. Thanks to its high power, this is the ideal amplifier for powering front and rear speaker drivers, or for hi-fi installations with a 2-way kit in the front and a subwoofer. The 2-/4-channel input modes ensure compatibility with head units only equipped with a pair output lines. The high power and musicality of this amplifier will ensure you get the best out of your high-end speaker drivers from our Performance line.


  • 4-/2-channel Class A/B amplifier
  • 70 Watts RMS x 4 at 4 ohms (100 Watts RMS x 4 @ 2 ohms)
  • Stable at 2 Ohms
  • CEA-2006 Compliant
  • Class A/B Design for Best Available Sound Reproduction
  • Active crossover for each pair of channels
  • A compact and versatile amplifier
  • Optimised heat dissipation
  • Extremely versatile
  • Remarkable power/performance/price ratio


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