Yes I’ve done that in the past with Stern 4” backbox speakers but this is a 10” sub and needs an mdf ring to seal it and make a baffle which will give better bass.
The sub crossover filter is useless also as watched a review on the amp so might be worth fitting a passive sub xover but as soon as I can make a lead up it’s getting plugged into a 15” external sub anyway
Had some games today and I’m finding it a really good game, I just cringe when my wife is playing as she is smashing the ball all over the shop
I have turned the sub level off, backbox speakers are really good.
I have some MDF speaker mounts (made to use larger speakers but should still work)