Shredso, I'm in a similar situation. Due to my faulty design I didn't leave much room for speakers. I was planning to mount them in the marquis and drill small holes in the plexiglass but I'm not the best at drilling plexiglass. I might try not drilling holes now. I'll practice on a spare piece and go from there. But I'll make sure it makes a difference. I'm assuming it would be better to have holes, but I've left part of the back open, so I doubt I'll get too much distortion.