I've got a pair of A7x for my setup. but no sub. My room is treated with 10 good absorbers but the bass on my tracks when listened to in car ect. is louder than in the studio. Will having a sub 8 help since I won't be trying to push more bass out of the A7x's and hear a truer mix? I bought the A7x's after hearing your accolades a couple of years ago on here. Thanks
A Sub8 is as likely to make the problem worse as it is to improve things.
If you have room acoustic problems adding more sound energy will likely just exaggerate the issue.
The only way is to try.