My son - 72 slammed Chevy PU with airbag susp- and his buddies all with show quality vehicles, to a man, think that MTX is an inferior product. The prefer high end Infinity stuff and Kenwood or Alpine .. but won't go near MTX. I am not sure if this qualifies as a recommendation...but they all have some major mutli amp systems in their trucks/cars ..just thought I'd pass it on jj