Not to be a troll,but why even bother with shaker subs,really non efficient and crapy quality,because the after market headunits have an integrated amp allready so you'll need signal controller or you'll be blowing subs like every day.The after market head units are runing on 2,4 8 ohm,the shaker subs are like 1.2,or like 0.5 ohm per voice coil or some stupid shit like this!The after market head units have different trigger voltage coming out of them 12V and the shaker amps is 5V you'll have to add a transformer on the +(trigger) wires otherwise you'll be hearing monster poping noise any time you turn the car on, and then the wiring,addaptors....it's an fuckin abortion I tried it.You can use the box if you want to keep the look,and deffinetly after market amp!The pioneer shallow mount subs are perfect replacement/fitment for the shakers.Just my
.Good luck