EQ Acoustics Project Corner Traps grey

Acoustic foam sold as bass traps is a sham. It only affects highs and some high mids, it does nothing for low mids and definitely nothing for bass. These just take up valuable space in the corners where you need to place proper bass traps. If I had saved all the money I spent on acoustic foam and bad wall mounting equipment over the years, I'd have a couple of great broadband absorbers by now.

I'd only recommend these for ceilings or surfaces where you can't (be bothered to) drill holes for installing proper fibreglass/stone wool or thick felt bass traps.