Mind Blowing, Goose Bumping Crystal Clarity Hertz' HCP 4D four-channel amplifier will deliver 70 watts RMS to each of your vehicle's speakers, improving the sound of your audio system as well as your listening experience. This versatile amp can run a pair of speakers with the front channels while sending 260 watts RMS to a subwoofer from the bridged rear channels. A variable bass boost on the rear channels helps your sub sound its best. Essentially, run your front channels and bridge a subwoofer for the rear. The high- and low-pass filters of the HCP 4D can be set as high as 3200 Hz, so you could use the amp to power a couple tweeters with the front channels, and a couple woofers with the rear channels, and gain more control over your system's different tones and levels. This amp will work with an aftermarket receiver using RCA connections, or a factory radio using speaker-level wiring and Hertz' ART™ automatic remote turn-on system. If your receiver only has a single L/R output, you can engage the Mono buttons on the front and rear input channels so the amp can power your four speakers from those two inputs Hertz speakers, subs, and amps have made cars sound super since 1998. Known for great sound and technological innovation, high-end gear from Hertz will bring powerful performance audio to any vehicle. 4-channel car amplifier 70 watts RMS x 4 at 4 ohms 260 watts RMS x 2 bridged at 4 ohms mono buttons allow 4 outputs from 2 inputs preamp and speaker-level inputs Automatic Remote Turn-on with speaker-level inputs. I ran this amp for less than 4 months and absolutely loved it. I had Focal separates up front and a ten in the trunk and it was a phenomenal setup.