With two dual 4 Ohm subs your final load will most likely be 4 Ohms (could also be 1 Ohm but not many amps are happy with that). I'm running a single 12W6V3 at 2 Ohms with about 560 watts and it's very happy.
The XD1000 does 600w at 4 Ohms so you'll be underpowering the subs a bit. They should be perfectly happy although you will be pushing the amp fairly hard. The JL is not rated for 1 Ohm.
I'm using a Zapco Z-1KD on my single sub but it is also rated at 1000w on a 1 Ohm load.
Take a look at the Net Audio boxes. The build quality is excellent. You definitely get what you pay for.
https://www.netaudiowf.com/product/2009-2017-dodge-ram-crew-cab-sub-box-dual-tall/
The XD1000 does 600w at 4 Ohms so you'll be underpowering the subs a bit. They should be perfectly happy although you will be pushing the amp fairly hard. The JL is not rated for 1 Ohm.
I'm using a Zapco Z-1KD on my single sub but it is also rated at 1000w on a 1 Ohm load.
Take a look at the Net Audio boxes. The build quality is excellent. You definitely get what you pay for.
https://www.netaudiowf.com/product/2009-2017-dodge-ram-crew-cab-sub-box-dual-tall/