[BroDoze]

Originally Posted by AdonisP91

You have no real center channel. AlphaOne chopped it out. The MatchUp 10 DSP only has 8 channel input. Audiotec Fischer recommends installing the MEC Analog In extension card and their wiring harness to add the 9th channel, the center channel, into that Analog In card.

BimmerTech didn’t want to add that extension card. So they cut out the Center channel and recreated a simulation, sending 50% front left 50% front right to that speaker. Who knows what impact that has on voice calls, system sounds, etc. Hopefully there is no loss and BimmerTech was right the Analog In extension card is unnecessary.

You’re right, and I knew this already. Ugh. I tested a hand-free call and it worked, of course. I also tested my rear surrounds for their parameter bongs. I’ve got em cranked down -3.0db, but I can still hear them fine. I’d prefer them louder but not at the expense of hearing those rear surrounds while playing music.

So with a fresh set of ears this morning, the car sounds pretty good to me. Sometimes you’ve gotta sleep on it.
I still need to dial in a custom house curve and re-EQ everything.