Had a Sony CDX-Gt330 stock speaker and a power bd1000a1 powering one 12" sub.Just replaced HU with a JVC KD-HDR20 now can barely hear the sub have to turn up the HU to 35 but don't want to listen to music that loud all the time.Had a nice boom with the Sony @ 20.The JVC doesn't have a loud function.Turned gain up a little past have but didn't help at low volumes.
Any help will be appreciated.