a while ago i bought a new HU, and pioneer coaxials all the way around. 5 1/4 in front and 6x9's in back. well.. with my stock unit (tape deck, with portable cd player hooked up) it was a hell of alot louder, with my stock speakers. now with this HU and these new coaxials, its like half as loud even when i have it at likr 40/46. any reason why? the HU is a POS, its a Dual. the black one with the fold out panel