I've got a speaker kit i'm finally going to get around to building sometime soon. My initial thought is to bring them in for my office - partly as a talking point, but also to be able to listen to some music while I’m working. The best place for me to put it is on a file cabinet facing my desk. To drive them, I was thinking of getting some cheapie Bluetooth digital amp. I’d use my phone’s Bluetooth and steam the music from that. I’m not really looking to spend a ton – as long as it’s not crap I think I’d be fine with this one. Anyone have experience with any of these devices? For example, i found this on Amazon. And a used one like this. What are your thoughts?