I dont know if this is a coincidence or not, but right now theres a subtle high pitch sound when i accelerate around 50kw up or regen above 50kw.. i recently did an aftermarket sound upgrade. could the sound be coming out of the speakers? its very subtle, but enough of an annoyance to know its there when no music is on. Didn't notice it before because music was always on. but when i have it on silent now I know its there.