RockvilleMicro Marine/ATV Amplifier 1600w Max 4 Channel 4x100/CEA Rated (RXM-S20)

This micro-amp does a VERY good job at producing loud, and clear sound! I hooked up the pair of speakers under the helm of my boat and boy, did the sound ever come to life. Much better sound than what I got from the amp this one replaced. Gain is set at half only. Channels 3/4 have their own crossover points (and gain). There is a switch for HPF (high pass filter) on channels 1/2 and both a HPF and LPF on channels 3/4. And from what I gathered, the PA Microphone only works on channels 3/4. I did get some interference from the speakers when I tried using the Microphone though. I am thoroughly impressed with the output from this amplifier.The instruction booklet that came with this amp is very lacking! No explanations on the LPF, HPF and crossover switches. It is pretty easy to figure out though. I am now in the process of ordering a set of wakeboard tower speakers that will run off channels 3/4.One more thing: When I hooked up my 6 1/2" separates to channels 3/4 AND switched to 12db BASS EQ, there was a substantial amount of distortion coming from my speakers. This makes me wonder how my set of 8" tower speakers will sound. Should be much better as they will handle way more bass than the 6.5" speakers! And still trying to figure out the LPF/FULL/HPF filter switch. LPF doesn't seem to work when channels 3/4 are hooked up only. Still some experimenting to do on my part to get the settings just right. But....I can say this amp does a solid job at sound reproduction, and it can make your speakers come to life!!!I was a skeptic (price point), but now I am a believer.I 100% recommend this amplifer to anyone looking to upgrade their marine stereo system.

These amps are great! Huge power small package. I have bought 2. The first one was sold with the car. The are a great little amp for the money.

Added to my older Mastercraft Prostar. Awesome amp and the PA systems is a great feature!

works good for music , Can't use the mic because it squeals loud

Just as described. Quick shipping. Reliable seller. The product has totally improved the sound experience on my boat.