Maybe it is a good thing that GM did not set the bar too high by choosing Bose audio. I drove a loaner 2016 Volt LT with the standard audio system for almost a week. I own a 2017 Premier with the Bose audio with the subwoofer. The base audio system on the LT sounded pretty decent to me, similar to the Bose speakers, just not as full in the lower frequencies. So if you have an LT know you are not missing much as far as the Volt's audio is concerned. I would grade the base audio system sound for (mid bass and higher frequencies / bass frequencies) as C+/C. I would rate the the Premier Bose audio system as a B/B.