The Focal AP-4340 is a 4-channel Class AB amplifier offering switchable 4, 3, or 2-channel modes. It delivers a CEA power rating of 4 x 70W RMS in 4-channel mode and supports bridged operation for increased output.

In 3-channel mode channels 1 and 2 run as a stereo pair while channels 3 and 4 can be bridged to power a subwoofer. The AP-4340 includes high-pass, low-pass, and subsonic crossovers to optimize performance with Focal Auditor kits and compatible subwoofers.