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Re: Subwoofer Isolation
tomtuttle #297855 03/22/10 06:54 PM
Joined: Jan 2002
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connoisseur
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Hi Tom,

If we put all of this in context, the actual floor-borne mechanical vibration from a sub or speaker is a relatively small component of the total output from a powerful subwoofer and/or full-range loudspeaker. It's the acoustically generated energy in the bass combined with the room's standing waves that set all kind of things in a room resonating, including the sheetrock, studs and wooden floor, often to an annoying degree at high volume levels (especially for easily annoyed neighbors in nearby apartments or condos).

Of course, as pmbuko notes, isolation pads would absorb mechanical energy but do nothing for the bulk of acoustical energy a subwoofer or speaker generates.

Regards,
Alan


Alan Lofft,
Axiom Resident Expert (Retired)
Re: Subwoofer Isolation
alan #297919 03/23/10 12:28 AM
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Hanging speakers from cables could be a bad idea. If the speaker hits just the right notes then it would excite the tensioned cable supporting it and cause it to vibrate.


M22 VP100 QS8 RX-V665 DMP-BD55 SMS-1 LFM-1+ LG47SL90

Depression is merely anger without enthusiasm.
Re: Subwoofer Isolation
prototype3a #297923 03/23/10 12:37 AM
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 Originally Posted By: prototype3a
Hanging speakers from cables could be a bad idea. If the speaker hits just the right notes then it would excite the tensioned cable supporting it and cause it to vibrate.


Back in the 70's, I met a guy named Tom.. He was in a band and played guitar. The story goes, he went on to "higher" education studied music theory using keyboards mostly... thought he understood it all got bored and became an airline pilot.

The interesting part and I have seen this happen... he could find the harmonics of a structure (the house we were partying in) and if he wanted to shake the sucker to the ground... it was amazing! He would just play around till everything was shaking. If I recall correctly, he had a sun amp. would turn it towards the wall and just go at it.

or it was the acid and a good story!

Last edited by wordgasm; 03/23/10 12:39 AM.

Fronts/Wides:M22s in/on
Center:VP150/VP100 in/on
Hghts,SS,SR:QS8s
Sub:EP500
AVR:Onkyo 3008
Re: Subwoofer Isolation
Glitchy #298061 03/23/10 08:23 PM
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shareholder in the making
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shareholder in the making
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The reason my front stage is insulated (some use sand) is to reduce the bass from the sub traveling to the user through the floor.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


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