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Down-firing Sub makes floor rattle

I just bought a ml dynamo sub. it is a great sub but it makes the floor rattle. i only use it for music so it is annoying..how do i fix this? i don't have it on the attached spikes as of yet....it is on the attached stand with rubber feet. would the spikes solve this? or should i just put something under the sub? this sub can also front fire, but i'd like to use it down-firing.......the carpet is very thin and maybe this is the problem?

thanks
cooch
cooch OP
81 posts
 
update........lowered the crossover to 39hz, huge difference, sounds much better...also, kept it downfiring, but put the spikes on, also definite improvement...now just trying to fine tune the volume...gonna listen like this for awhile, then try to front fire...see what happens.....i really do like this sub and may just get another for stereo subs...what do you think?
dgarretson
2,594 posts
 
An Aurelex foam platform should do the trick. This was very effective in taming the 160 yr. old sprung floors under my Vel DD-15.

http://www.auralex.com/sound_isolation_gramma/sound_isolation_gramma.asp
calbrs03
184 posts
 
Turn the gain down.
alextychkin
87 posts
 
And that's exactly the reason why for music one wants to get a front-firing sub with side radiators, something like Totem Thunder, for example.
dgarretson
2,594 posts
 
Alex, when I was shopping for subs, Velodyne Tech Support told me that, assuming proper physical decoupling (slab, spikes, platform, etc.) due to long wavelengths there is no difference in room vibration caused by downward vs. forward radiator.
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