I'm wanting to put it under passenger seat if I can, but it looks like there's bugger-all room underneath it. It's an Audison SRx 2, and its dimensions are 36x22x6cm. I'm going to try pulling the seat in the next few days and trying fitment that way, but if someone who already know's it won't fit can save me the trouble, that'd be appreciated

If that won't work, I'm thinking of mounting it behind the passenger seat instead. Is there anything behind that carpet I should be concerned about drilling into?
Thanks for the help guys.