| The RPG Modex Plates are fantastic and can truly help a 45Hz issue when placed proper.
Back to thge GRAMMA, full discloser...I worked at Auralex. I designed the GRAMMA and I have patent on it...however I have no financial benefit from their sales....all that junk being said...try it. One will support your sub, two would be ideal. I suspect you'll not only clear up the sympathetic vibrations, but enjoy a tighter, punchier bass response.
Many dealers have return policies, so it's a simple no risk effort.
Back to the tuned absorber topic...be leary of expecting such devices to be miracle workers below 50Hz...it's more likely to create an "after ring" or not address the issue than be successful. They can and do work...I like to use them in conjunction with proper broadband trapping for extra muscle. |