Review on Enhance Your Ride with the BOSS Audio MC420B Motorcycle Speaker System: Class D Amplifier, Weatherproof 3 Inch Speakers, Ideal for ATVs, Motorcycles & 12 Volt Vehicles by Sam Thorpe

I wasn't expecting much from them but they sound very good and loud. I'm streaming Spotify radio via bluetooth and the quality is pretty good. You should check your streaming apps settings to get the best sound. I haven't tried the mini audio connection, but I should. Many people expect great sound when connected via Bluetooth, but as any music lover knows, you lose a lot of quality with Bluetooth. You're always better off using a wired connection for more volume and better quality without the pops, clicks, and hiss from radio interference. As most people have commented, they don't have very deep bass, but these things suck the life right out of your battery. If you add a subwoofer or deeper bass, you will likely experience performance issues with your bike. I highly recommend getting a charger for your bike and leaving it on the bike while it's in the garage after using this system. Your bike cannot fully charge the battery if you ride it on the highway for more than 30 minutes and you will find that it takes longer for your bike to start. I tried this after installing it in my garage with the engine off and putting on a few tunes while tightening everything up and it completely drained my battery. I had to start with my truck, which isn't really a good idea, but I wanted to drive. My only real complaint is that they didn't provide a power button. I bought a toggle switch at an auto parts store and installed it next to my seat. You should NOT leave it connected to battery even when not playing music, otherwise you will run out of battery to run it. Don't follow the instructions to crack your ignition. This is not a good idea for a motorcycle or other vehicle that does not have a weatherproof hood. Even a small amount of water on bare wires can ruin your day in a split second.