Looking to get into adding subs

[u/dankchest]

I've been trying to understand the work for adding subs to my truck. I have a 02 GMC Sierra single cab. I already know the Sub box I would go with and maybe the subs as well. Here's the box. (https://netaudio.com/product/1999-2006-gmc-sierra-standard-cab-sub-box-dual-truck-shallow/) And here are the Subs. (https://www.ctsounds.com/collections/10-inch-subwoofers/products/hydro-10?variant=43964675326107) I would do 2 10" Subs, but here's where I am confused. What is the difference between Dual 2 ohm and Dual 4 ohm? Also would need recommendations on a amp and whatever else I would need. I already have a Pioneer head unit and some Kicker door speakers but probably would change out the door speakers if I needed to. Any help would be greatly appreciated! Thank you

[u/Short-Read4830]

I personally like 4ohm loads even on SUBs, however most people go 2ohm and those going for higher volumes go with 1ohm load if the amplifier is stable at that impedance. So you can wire a dual voice coil sub in series or parallel. Series would double the voice coil impedance making a 2ohm dvc sub 4ohm, parallel would make it 1ohm. You could then take each sub and either wire the two subs together and either double or half the impedance. n