Muchmore
FRF Addict
I think @The Car Stereo Company was the vendor that explained it. This is probably totally my mistake but I could swear someone asked why does XYZ device need to be installed when upgrading the stock stereo and the reply was, because as the stock stereo increases volume it takes away bass to limit distortion. This really could be me mixing things up, but I did consider doing a stereo install as well and this was a setback for me at the time.Have not heard that so if so I am oblivious. It sends a flat single out to amps and is a pretty common and supposedly the best way to do it. For the price, it should be.