What's under your sub?

Two different approaches in different systems. In the office system, I use a Sub Dude under a Velodyne. It made a very surprising and significant, instant improvement to tighten up the bass, correct for more tuneful bass, and reduce boom.

At home in the main system, I use ASC Sub Trap under a JL Audio F112. Also helped, significantly, reduce boom and tighten bass.

This is interesting... I have a VMPS sub with a Front firing 12" and a 15" Radiator firing from the bottom. Right now it sits on a thick carpeted floor on the second floor, so its a wood subfloor. any thoughts??

My front firing
REL B2 is on hardwood floors with nothing but felt on the feet I believe. Zero problems. I love my REL.

I am in this business for over 15 years of time. In the past I sold a lot Rel subwoofers. Beside this I have done many different tests with subwoofers as well. I would only choose for downfiring for surround. When you have an ols house or woodenfloor you get more drive. The floor makes the low freq even more pronounced. Even with music it can give some more fun. But..... when you want the best what i call steatlth integration with your speakers a closed subwoofer with only one bass unit in front is the way to go. Also in timing and speed this works a lot better. When you have a very fast subwoofer in respons you can use to higher freq. I use mine from 16 hz till 140 hz. From 80 hz low freq. become touchable. With audyssey pro and using it till 14o hz I have full stealth integration with my subwoofer. In the past I thought that this level never would be possible. Time and technique changes and sometimes dreams can come true.

Try taking your downfiring sub and turning it upside down. Place a wooden board on the upturned feet and put something heavy on top to hold it in place. Now adjust your sub volume appropriately (you will likely have to turn it up a bit).

Should be tighter and cleaner than before.