Five Channels of FunThe CXA660.5 Amplifier is built to be the complete package in one cool-looking amp.This CX amplifier uses powerful Class A/B technology to power four mid/high-range channels and an ultra-efficient Class D power plant for the bass channel. The amp also comes equipped with FIT+™ (Fail-safe Integration Technology-PLUS), giving you superior clarity and dependability.KickEQ™ variable bass boost gives you as much as a 6dB of extra bump with a simple turn of the knob. A powerful 12dB crossover and 24dB subsonic filter is also included, letting you quickly tune your entire system to taste.This CX amplifier delivers as much as 90 watts into four full-range channels or 180 watts into two-bridged channels, plus as much as 300 watts into one bass channel. See below for more details.Class A/B full-range channelsClass D bass channel included for one amp to run an entire systemThree-second turn-on/off delay to eliminate unwanted interferenceVariable 12dB crossovers provides control to dial in perfect soundKickEQ™ 6dB variable bass boost for those additional low frequencies24dB subsonic filter for protection from potentially damaging frequenciesFIT+™ (Fail-safe Integration Technology-PLUS) means it works with nearly every radioAccepts up to 40-volt input signalSmall footprint for easier installationVertical mounting hardware included for another unique lookSpecificationsMODELCXA660.5Power (watts/ch) 4 Ohm Stereo65×4Power (watts/ch) 2 Ohm Stereo90×4Power (watts/ch) 4 Ohm Stereo180×2Power (watts/ch) 4 Ohm Mono Sub Ch150×1Power (watts/ch) 2 Ohm Mono Sub Ch300×1CXRC Remote Bass Capable (sold sep.)yesDimensions (in, cm): (all models 2-3/8, 5.9H x 6-3/4, 17 W x …L)14-1/8, 35.7Frequency Response (Hz):10Hz-20kHzFrequency Response (Hz – Sub Ch.):25Hz-200HzInput Sensitivity:125mV–5V (Low Level)1V–40V (High Level)Signal-to-Noise Ratio:90dBActive Crossover:Amp 1-2: High Pass 10-200Hz @ 12dB/OctaveSub Channel: Low Pass 50-200Hz @ 12dB/OctaveSubsonic Filter:25Hz @24dB/OctaveKickEQ™ BoostVariable 0-6dB @40Hz