Review on Enhanced Audio Control DQ-61 OEM Sound Processor by Harry Tulsa

Not wanting to replace a 2017 Highlanders head unit, I used a DQ-61 to sum the channels and then sent that signal to my amp. This is one of the best signal processors I've come across, and even my installer, Kimballs Mobile Electronics in Savannah, Georgia, agreed that this thing does a fantastic job. With a summed signal, you lose separate EQ controls for the front and rear speakers. But that's not really a problem as I still prefer setting them up the same way.