one amp, two subs, low funds

I have a 03 impala, kenwood ddx 419 head unit, 4 rockford tweeters, 4 eminence 6×5 midranges, jl w7 12 and rockford t2 d4 12 same box different ports split. Skar 1500 amp on the t2 12 and a rockford bd cp 1000 on the jl w7. Optima yellowtop in the trunk. My skar amp went out and i just want to run both off the rockford amp. Can it be done without ruining my amp. And how should i wire the subs .

I have soundquest 4 gauge power and ground cables should i upgrade to 0/2 gauge on my grounds an power coming from my alternator&battery to my distribution block. I know i should im just low on funds but im going to upgrade my wires. I used to go to the stereo shops until i had kids and couldnt afford it and had to fix it i mean burn doodie up in my car till i got it to play. LOL now i just try to do it all myself. I have them both on the rockford now it sounds pretty decent i havent tested the wattage yet but im guessing thier both wired parallel in the amp so if my rockford is is wired at 1 ohm and the w7 is at 3 ohms does that make my impedence at 4 ohms? Im new an dumb to ohms law

If you are using 2 batteries, I'd strongly suggest an isolator (ie, relay).

Thanks u r probally right.

What is the minimum safe operating impedance of the rockford amp? What is the impedance of each voice coil of each woofer? How many voice coils on each woofer?

Jl w7 12 inch svc 3 ohm rockford t2 12 inch dvc 4 ohm.

Rockford 1000bd cp stable at 1 to 4 ohms.

1 ohm lowest

Go for it. Be sure to set your amp's gain correctly (see Hot Topics if you are not sure how to do this.)Support the12volt.com

I just got new rockford tweeters and they didnt come with crossovers the tweeters were left overs from old stock rockford fosgate t1 power component speakers. Do i still need the crossovers if i run them to my amp on the same channel.