I just ordered the tune 2air and the matchup 7 amp with bluetooth add on . I want to compare both bluetooths cause the bovee supposedly will use steering wheel controls but the amp add on does Apt x and avoids the 2 dacs. Anyway I'm curious how volume control works with that bluetooth add on and very curious how the amp will make my car sound. Also Figures 24 hrs after I ordered the amp bavsound emailed me that the revenant is 749 for open box and they have crazy deals on stage 1 speaker upgrades to. I think I might finally build box for a 10 inch idmax and finally use my gladen 600 now that i have a sub out on this amp. I kept procrastinating getting a technic harness.