high-pass or low-pass settings, and then allows bandpass to also be accomplished thanks to two more separate frequency controls. Suffice it to say, if you can’t send the right signals to your system’s speakers with this amp, you need some help.
Crossover flexibility aside, there are other nice touches to be had with the Focal amp. The power supply is regulated to provide the same power to your speakers, regardless of battery voltage. There are three pairs of RCA inputs for maximum signal control, but there is also a 2/4/6-channel signal steering switch, so you can drive the entire amp with whatever signal input you have handy. If you don’t have RCA outputs, the FDP6.900 will accept speaker wire level inputs directly to the RCA connectors thanks to the very wide range of gain adjustment available. When using speaker level inputs from a BTL amplifier (typical OEM amp) there is no need for a separate turn-on wire, as turn-on will be sensed through the RCA connectors. A wired remote subwoofer volume control is also available.