My two subs are on a tile floor (most of rest of room has padded carpet rug). Should they have a rug, rubber mat, or Subdudes underneath or should I keep them on the tile? Which will have the better result? The subs are downfiring Hsus.

bump

My dual subs are on tile floors as well. I never had a problem with tile floors. Unless your Hsus get up and walk across the tile, I don't really see a problem. I've heard some people placing a mat or even a granite slab under their subs for added stability but performance wise, I doubt theres great performance to be had just by placing something different beneath it.

That's pretty much what I figured. I wasn't sure about the effect of a hard surface on low frequencies. To me the bass sounds a bit tighter than my previous padded carpet. I was wondering whether or not to place a couple of Subdudes beneath. Probably no effect though.

I've been looking into this as well... I've got a down-firing SVS sub on a tile floor, which is on the ground floor with concrete underneath.

So far most agree that nothing is needed underneath the sub when it's on tile, unless you wanna place the sub on its side and just need to protect the finish. But sound-wise, apparently nothing is needed.

I've got a down-firing SVS sub on a tile floor, which is on the ground floor with concrete underneath.That sounds optimal to me.

If you're on a tile-over-concrete floor, and you have a downfiring sub, I would not use a SubDude or any other isolation product. However, I would use some kind of rubberized feet (not hard metal spikes) on the sub to keep it up off the floor and to ensure that it doesn't vibrate against any hard surfaces.

Craig

I have been using my subs for years firing down onto a hard tile floor. Odd enough when I got my HO I had to put a rug under it because I would place it three or four inches from the side wall and it would xlide away from the wall. I also use a downfiring mbm and untill the wife did some remodeling was downfiring onto the tile and it sound really good in that configuration.

If you're on a tile-over-concrete floor, and you have a downfiring sub, I would not use a SubDude or any other isolation product. However, I would use some kind of rubberized feet (not hard metal spikes) on the sub to keep it up off the floor and to ensure that it doesn't vibrate against any hard surfaces.
What kind and/or size rubber feet would be required for a Plus/2 sub? (it's 140 lbs.)

What kind and/or size rubber feet would be required for a Plus/2 sub? (it's 140 lbs.)Use the ones that came with the sub. They are small, stick-on rubber pads. If you don't have them, ask SVS to send you a set (6). They work well for isolation and to keep the sub in place. Not good for sliding the sub on the floor as they will more than likely peel off.

If your subs come with spikes and nothing else, its really not a good idea for them to be on tiles as they will vibrate and may even pass that vibration on to the rest of your system. I am using DH squares as footers.