I have a 2018 S with the UHF sound system. When I purchased the car, despite the fact that it had a subwoofer, low frequency sounds were sorely lacking. I added the NVX B.O.O.S.T. system to the car a couple of months after purchase and have found it to be excellent. My question with the new 2021 refresh S is, since there are 22 speakers in the new iteration, along with active noise canceling, can anyone that has taken delivery sound out about the new system and whether the low frequency sounds have been vastly improved, or if an add-on subwoofer is still needed?