REL Classic 98

No, you cant stack downfiring subs. The goal is to get both drivers as close as possible.

REL isn’t the only game in town.. SVS are also stackable (as well as others). You should take 5 minutes and call them also.

If your not trying to achieve high level bass or it doesn’t mean that much to you then one sub will do just fine. You know the room and what your aiming for better than anyone here.

However, my point is, IF your going with 2 subs, shooting for the best bass quality, there’s no reason not to stack them vs. running 2 subs in stereo.

Make a few phone calls.

I have reached out to REL, @gdaddy1 . No doubt stacked S/550s would sound better than 2 T/9xs on the floor, and they would take up less floor space.  So, perhaps that is where i will end up. The monoblocks are scheduled to arrive on Tuesday, so i can start experimenting with the single T/9x then and decide whether that sound is unacceptable.

thanks, again.

T9X to a pair of Classic 98 would absolutely be a downgrade.  That's not the right move.  Get another T9X.  Classic 98 takes up about the same amount of room and is if anything more visually intrusive.  It's a cool sub if you want that look, but the T9X is far far better.

Thank you, @simplystereo . That is highly responsive and valuable.  

@gdaddy1  Two stacks needed, or does one suffice?