I got the 18 speaker upgrade, but the quality is terrible. I didn't get the ACR expecting symphony quality sound, but $2,000 is a waste of money.

First of all, for 18 speakers in such a small cabin, it should shake your kidneys, but it doesn't.

The bass is way to loud compared to the highs and middle. If listening to EDM, i am always at -10.

I would save the $2,000 and get After Market system.