Hi. I replaced the factory HU in my MD 2008 with Bose, on 2din Android. I connected the Bose amplifier from RCA to the factory connector as described in another topic in this forum. To confirm the correctness I got information from Metra. Unfortunately, the speakers are very quiet. Anyone had such a problem? The radio has outputs directly on the speakers, and RCA (4 + 1) for the factory amplifier. Bose takes off because he plays, but why so quiet?