Review on BOSS Audio MC900B Weatherproof Amplifier - 4-Channel, Bluetooth, 500W, Bluetooth Remote, Full Range, Class A/B, 4-8 Ohm Stable, Aux-in, RCA Outputs, USB Charging by Crystal Taylor

We operate with our four outdoor pool speakers. Compact and easy to use, this thing has amazing performance considering its low power requirements. My wife loves bluetooth and I love the aux cable. Despite being in a relatively tight, sealed case with a good power adapter (which you'll need if you want to run it on AC power rather than a battery), heat wasn't an issue. This thing is actually loud enough to offend our neighbors 300 feet away if we're not careful.