Got my amp replaced yesterday (finally) on my 2024 GX 550 OT+ under warranty. Definitely better (IMO), still a bit lacking, but worth getting it done if you can. The bass held up at 50+ and didn’t cut off to the “tinny” sounds. I’d like to flip out the speakers and, hopefully, get a more “quality” sound, especially in low range. My fourth documented complaint since October 2024. JM Lexus in Margate Florida came through with a three week wait time! Was told on prior occasions by other dealerships, that a fix wasn’t available but the complaints were a “known issue.” It really is an improvement!
