Isolate Sub from floor

[Pyro]

Originally Posted by PHC1

Seems like an effective, reasonably priced solution.

Doesn't look to bad either.

[PHC1]

Originally Posted by Pyro

Doesn't look to bad either.

Not at all.

[Pyro]

Originally Posted by JJinID

I'm using these under mine and they work well and are relatively inexpensive (~$50 each): Auralex Acoustics - Products

I ended up ordering a subdude. Received it yesterday and placed in under my sub. No good!!! The subdude could not support the weight of my sub. It looked like it was ready to fall over.

No worries I am using the subdude with my computer speakers.

[PHC1]

Originally Posted by Pyro

I ended up ordering a subdude. Received it yesterday and placed in under my sub. No good!!! The subdude could not support the weight of my sub. It looked like it was ready to fall over.

No worries I am using the subdude with my computer speakers.

Thanks for the follow up. I guess for $50 one can't expect too much.

I know the ASC products are rather pricey but man do they work.

[JJinID]

Originally Posted by Pyro

I ended up ordering a subdude. Received it yesterday and placed in under my sub. No good!!! The subdude could not support the weight of my sub. It looked like it was ready to fall over.

No worries I am using the subdude with my computer speakers.

I'm really sorry Pyro to hear that my recommendation did not work for you - I looked it up again and noticed that the subdude I linked to is 15"x15" while mine is 15"x23" so perhaps it is more stable. Also my PS112 is 99 lbs while your JL F113 is 130 lbs so even still it might not be able to handle the extra weight.

I intend to get a couple of JL subs in the future so it looks like I will have to figure out a different isolation device when that happens...

[Pyro]

Again no worries. I used the Subdude with my 5.1 system on my computer.

The ASC product can hold the sub. But dam that think wouldn't look good with my setup. Not even the WAF more like me. LOL.

I will keep looking.

Thanks,
Rob

[Gordon]

Pyro, what part of the wonderful state of Maryland are you located in? I'm in St. Mary's county about an hour south of Waldorf.

Gordon

[jdandy]

Pyro.......Although an isolation platform under your subwoofer may help to decouple your subs vibrations from your floor, it will do little to stop sound wave propagation through walls. If you share a common wall with a neighbor, the large wave forms created by the subwoofer reproducing low frequencies will excite the properties of the wall, i.e. drywall, metal or wood studs, etc. If the parting wall were constructed as two seperate stud walls, densely insulated, and sheetrocked on both sides with a dead air space between the two walls, and you used a good floor isolation platform, then you might have a fighting chance of reducing your neighbors disturbance.

Typically, parting walls are a single set of wall studs, and if you are very lucky, and the local building code required it, double sheetrock will be used to slow the intrusion of fire for a specific time period, usually one hour. Even double sheetrock will not stop the sound energy from large low frequency waves coming off the subwoofer's driver, although the thicker density of double sheet rock will help reduce sound transmission better than a single layer on each side of the wall. A sound wave is a periodic variation in air pressure. Unless you can stop, or dramatically reduce this air pressure variation from reaching the other side of the wall, you can not stop sound from penetrating the wall. A subwoofer isolation platform will not help this problem.

[US Blues]

Pyro- I had the same problem you describe, Vandersteen sub set the wood floor vibrating. I obtained a piece of quarried sandstone, nearly 3 inches thick that is the same size as my subs footprint. That killed the floor vibrations which tightened up the sound in a good way.

All I see under the sub is the 3 inch facing of stone which looks nice IMHO. The cost was about $20, plus the good exercise carrying the stone in from the car. After hearing the benefits I went back and thinner blocks for under my main speakers, since they contributed to the floor vibration as well, and one for under my gear stand, which made a nice improvement in sonics as well. All for under $100!

Full disclaimer: no WAF required for my system.

[Pyro]

Originally Posted by jdandy

Pyro.......Although an isolation platform under your subwoofer may help to decouple your subs vibrations from your floor, it will do little to stop sound wave propagation through walls. If you share a common wall with a neighbor, the large wave forms created by the subwoofer reproducing low frequencies will excite the properties of the wall, i.e. drywall, metal or wood studs, etc. If the parting wall were constructed as two seperate stud walls, densely insulated, and sheetrocked on both sides with a dead air space between the two walls, and you used a good floor isolation platform, then you might have a fighting chance of reducing your neighbors disturbance.

Typically, parting walls are a single set of wall studs, and if you are very lucky, and the local building code required it, double sheetrock will be used to slow the intrusion of fire for a specific time period, usually one hour. Even double sheetrock will not stop the sound energy from large low frequency waves coming off the subwoofer's driver, although the thicker density of double sheet rock will help reduce sound transmission better than a single layer on each side of the wall. A sound wave is a periodic variation in air pressure. Unless you can stop, or dramatically reduce this air pressure variation from reaching the other side of the wall, you can not stop sound from penetrating the wall. A subwoofer isolation platform will not help this problem.

Dan all good info. I am well aware of how sound transmits especially with regards to Sound Transmission Classifications. Also that sound travels as different speeds through different mediums.

My only reason for isolating the Sub from the floor was to remove the vibration and structure borne audio caused by having the sub sitting directly on the floor.

As for the walls they will just have to live with it or come over for a beer and listen to some music.

The real problem is we don't get to choose are neighbors.