Performance Series Ultra Compact 350w Mono Amplifier - Focal Car Audio FDS1.350 The FD 1.350 is a mono block amplifier specifically designed for handling a subwoofer channel. It has a power of 210 and 350 Watts RMS under 4 and 2 Ohms respectively. In order to configure the system’s bass according to the car’s installation; it is equipped with an active crossover, bass correction and phase adjustment. Direct Fet technology optimises the amplifier’s heat management. This technology helps reduce the overall temperature of the MOSFET components, thanks to the optimisation of their electrical and thermal resistance. Actually, everything takes place in the casing of the component: thanks to a specific design, heat is dissipated via the aluminium heat sink and also via the chassis. This gives the advantage of obtaining more power in a confined space, making it possible to combine integration and sound quality. The use of low-noise operational amplifiers considerably reduces distortion. To be more specific, this means increased musicality and enhanced precision. Low Pass Filter For extra flexibility, a variable LPF makes audio frequency more adjustable according to subwoofer characteristics and personal listening preferences. The FDS1.350 LPF is adjustable from 40Hz-400Hz Specification Mono D Class amplifier with dual output High-level inputs with auto-detection / RCA low-level inputs CEA power (4 Ohms): 1x210 Watts RMS Power max (2 Ohms): 1x350 Watts RMS Low-pass crossover: 40Hz-400Hz Progressive phase adjustment (0-180°) Bass boost (0/6dB/12dB) Protections: Short circuit / low impedance / reversal of polarity / DC / power drop / heat protection Dimensions (LxHxW): 199x108x43mm Weight: 1.8 lbs