[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.

[BMW DIY Guy]

Originally Posted by BroDoze

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.

Really looking forward to the results and how that can apply to our cars. I use Tidal through Android Auto 99.9% of the time

[BroDoze]

Ok, just had an interesting convo with Nick at Resonix, concerning the BMW Digital pre-amp interfaces he USED TO SELL.

He sold off all of his stock to RDVFL:
https://rdvfl.com/products/ar1-bmw-e...e02a4215&_ss=r

Nick wasn't moving his stock and he had too many hit/miss issues with the boxes, particularly in Volvo and Land Rover installs. Nick personally never did a BMW install.

I spoke to Rich (Nick's referral) at RDVFL who was very helpful/knowledgeable on the stock BMW audio setup and how to get this interface set up successfully.

I ordered the pre-amp interface because he honored Nick's old pricing - not happy about dropping $900, but what the heck. I have too much invested now for the 80% I'm hearing. Should ship today.

I will obviously be letting you all know how this expensive rabbit-hole turns out, step by step.

It will be interesting getting all of the routing properly set up, based off the Toslink input.

He said he thinks running the under-seat woofer's lo-pass up to the midrange hi-pass point sounded like a great idea to play with, given the lack of real mid-bass drivers in the car.

Assuming I can get it all working, it is very exciting having an insanely clean digital signal direct to the UP10. Note the "Cons" on the ADVFN website link I posted - because of a different internal audio path, in the stock head-unit, low-end signal is hampered on AM/FM radio and a few other inputs. I think, for me, I'm willing to deal with this. I only use AM for talk radio and never use FM in the car.