Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
While I don't have a supercab, I have a B&O in my supercrew, sub sounded awful, with Forscan, I reprogrammed it as an aftermarket sub, now it vibrates the mirror, your mileage may vary.
The stock B&O does come with a sub and the overall sound is better than an average stock setup but that's not saying much. For some people they will be just fine with it but if you've ever ventured into high end audio you won't be satisfied and the Forscan thing is a gimmick at best. Listen to it your self and if you satisfied then you will save yourself 3-6k. If you do go down the rabbit hole here's what I did:
FOCAL ES 165KX2
FOCAL EC 165K
DUAL JL AUDIO 10TW3-D4
Custom sub box mounted behind the rear seat
JL AUDIO TWK[emoji769] 88 SYSTEM TUNING PROCESSOR
JL AUDIO HD SERIES HD900/5
ZEN-A2B / DSP12A-A2B
Everything was mounted behind the rear seat to preserve the amazing floor space of my 19' SCREW....and it sounds AMAZING!!!
If you decide to upgrade with aftermarket parts the single most important component is the Zen-A2B which provides the required interface from your head unit and allows you to get rid of the stock amp.