Not sure if this is relevent to the conversation anymore or not, but i kinda feel the same way about my SA-12s i just installed (whole other thread about that), but its exactly how you worded it for me, Some songs railed with my alpines, and they dont with the Sundown, songs that didnt, Do now, i never realized how great the bassline of collie buddz "come around" was until the sundowns, but at the same time when excision plays in my car the mirror sits still....Maybe I'm not wording it correctly ,best way I can describe it is the songs the kicker got loud with the sundown sounds weak but on songs the kicker didn't sound good (low bass) the sundown sounds amazing and literally feels like its vibrating my car apart. I'm just going to mess with the amp tomorrow see what happens. Thanks for your help man.