inputs.text: amazing sound - added speakers part complete nose tail alpine systehem 2001 ws6 trans alpine idax305s head unit alpine spr17s front doors alpine spg17c2 back seat area alpine swr1043d sub originally alpine pdx5 amplifier 4channel plus monopower spr17s sound amazing nice clean highs good mid bass spg17c2 great rear fill sound quality well bit disappointed bass songs 1043 not show installer said 320 not enough highend heavy duty sub like 1043 ordered installed along amp alpine pdx1600 drive sub wow wake systehem amazing clear highs nice punchy mid bass clean clear low bass awesome sound systehem thing would done different get 4ch 100 150 amp go mono 600 sub 75w 4ch unused 320 mono not worth selling changing get 25w per ch learn build say amazing sound loud crystal clear audiophile pleased parts happy camper pete