I found 2 boxes in the trunk that are the HK Logic 7 Amp and another box.... I would like to know what this box is for? Does anyone know? I've posted the picture below.

My next question is if I replace the amp with a normal Soundstream 5 channels amp + 2 sets of focal 4" components, besides from losting front console speaker (x1) and the back door speakers (x2), would there be anymore functionalities that I would lose?

Thanks for any input or recommendations.

 

This box is MULF2 (SA644 option) - Bluetooth telephone module.

For Logic7 amp all data, volume contol ant etc goes threw fiber cables (MOST), so You cant connect aftermarket amp.