I recently switched from a pioneer DEH-4000UB to a pioneer MVH-p8200bt and ever since any set of subs I have had are not loud at all. Both H/U have 4v pre outs, and I tested it with the new MVH. I purchased new kicker RCAs (which were needed), a Sundown SAZ-2500D (old amp: power Acoustik BAMF 4000/1d), and a RE XXX 15" dual 2.
The original setup I had with the old h/u was the BAMF and two alpine type x and it was much louder. Nothing has sounded good with this new h/u. I may switch back but I wanna know why this h/u is making my subs sound like poop