what head unit would be the best for controlling the bass/treble of 2 amps (1 for interior speakers and 1 for the trunk speakers) i see Alpine and Kenwood decks that have this for ex.:
Alpine CDA-9831: Bass Engine Plus (bass center frequency, width, and level, plus treble center frequency and level adjustments, as well as 4-channel digital time alignment and a 3-position, 12dB/octave crossover, subwoofer level and phase control) 4-volt front, rear and subwoofer preamp outputs
Kenwood Excelon KDC-X959: Bass Management System (provides extended Sonic control over compatible Excelon amplifiers) 4.5-volt gold-plated front/rear/subwoofer preamp outputs
i was thinking that the alpine would be the best bet but maybe someone knows a better brand or version. thanks