I haven't seen many discussions about the optional B&W sound system in the iX. I think it has a jillion watts and a thousand speakers...at least it seems so. I have all the special sound options turned on and love feeling my driver's seat vibrate to the bass boom. Considering the low ambient sound inherent in an EV added to this killed sound set-up...I have never enjoyed a car sound system like in my iX50. It's expensive - but well worth it!