MC470B

Wired this into my fairing and the inline volume knob is way handier than digging out my phone at stoplights. Bluetooth streaming from my iPhone has been rock solid, no dropouts even at highway speed. For something this compact it fills my helmet with sound easily.

The Class D amp is surprisingly loud for how compact it is — I've got it tucked under the fairing and it still pushes clear sound at highway speed. Bluetooth pairs fast with my phone and the aux-in was handy when my buddy wanted to plug in his older iPod.

The inline volume knob is way more convenient than digging my phone out at a red light. Streaming music over Bluetooth while riding sounds clean even at highway speed, which I honestly didn't expect from something this compact.