Reducing Subs Vibrations - Blu-ray Forum

equalls · 07-06-2009, 04:44 PM

I recently upgraded my sub and now with my new one, even at low levels my whole apartment building shakes. I live in a older building so it makes the stair well outside shake and should like an earthquake. I was wondering if there is something i could set it on or a stand i could build to help with this problem.

Thanks

LaMp-PoSt-MaFiA · 07-06-2009, 05:26 PM

try turning the volume on your sub down a bit

aramis109 · 07-06-2009, 05:39 PM

What equipment do you have?

A sub isolation riser similar to the home built ones or the Auralex Gramma will help reduce some of the vibrations you're getting. Some room treatment like sub traps will help as well. You may want to consider turning the sub down a bit as well and playing with placement- perhaps you have it too loud because it's not in a good spot? I've seen plenty of people say "I have it all the way up and don't get good sound" because it's in the wrong area for where you're sitting. Meanwhile their house is falling down around their ears.

equalls · 07-06-2009, 06:05 PM

thanks for the help. I have the sub a the lowest level and it still vibrates everything. The building is really old and probably not built very well. I was wondering if some foam or padding underneath it would help.

Grevlin · 07-06-2009, 06:06 PM

Quote:

Originally Posted by aramis109

What equipment do you have?

A sub isolation riser similar to the home built ones or the Auralex Gramma will help reduce some of the vibrations you're getting. Some room treatment like sub traps will help as well. You may want to consider turning the sub down a bit as well and playing with placement- perhaps you have it too loud because it's not in a good spot? I've seen plenty of people say "I have it all the way up and don't get good sound" because it's in the wrong area for where you're sitting. Meanwhile their house is falling down around their ears.

Ha! I was going to link the thread, but you got there first Aramis.

Turning speakers down should be avoided at all cost!

typ44q · 07-06-2009, 07:35 PM

I have a auralex gramma and it works very well to isolate the sub from vibrating the floor and everything around it. If you are going to build one yourself just make sure you are looking at the plans for an isolator and not just a riser.

Steve · 07-06-2009, 07:35 PM

Quote:

Originally Posted by equalls

thanks for the help. I have the sub a the lowest level and it still vibrates everything. The building is really old and probably not built very well. I was wondering if some foam or padding underneath it would help.

Putting foam underneath it may help a little, but a true sub isolation riser will be the most beneficial, and the difference between the two will be significant.

Big Daddy · 07-06-2009, 10:47 PM

If the sub is in a corner, move it away from the walls slightly. Subwoofers tend to become loud and boomy in a corner.
Experiment with other sub locations in the room to get good bass sound without creating an earthquake.
Turn the level on the back of the sub to 50%-60%.
Turn the crossover on the back of the sub all the way up to its maximum point.
Set all your speakers to small and adjust their crossovers. Usually 80Hz is a good start, but you can use other crossovers depending on your speakers.
Run the auto calibration program to calibrate all your speakers, including the subwoofer. Alternatively, you can buy a digital SPL meter from Radio Shack and do the calibration manually.
Put a thick area rug under the sub.
Open the sub. Add some polyfill to it without overstuffing it. You can buy polyfill from Wal-Mart for less than $5. Make sure it is flame retardant.
Put the sub on a riser and put dampening material under it.

Fors* · 07-07-2009, 12:19 AM

Quote:

Originally Posted by Big Daddy

If the sub is in a corner, move it away from the walls slightly. Subwoofers tend to become loud and boomy in a corner.
Experiment with other sub locations in the room to get good bass sound without creating an earthquake.
Turn the level on the back of the sub to 50%-60%.
Turn the crossover on the back of the sub all the way up to its maximum point.
Set all your speakers to small and adjust their crossovers. Usually 80Hz is a good start, but you can use other crossovers depending on your speakers.
Run the auto calibration program to calibrate all your speakers, including the subwoofer. Alternatively, you can buy a digital SPL meter from Radio Shack and do the calibration manually.
Put a thick area rug under the sub.
Open the sub. Add some polyfill to it without overstuffing it. You can buy polyfill from Wal-Mart for less than $5. Make sure it is flame retardant.
Put the sub on a riser and put dampening material under it.

Nice post BD...only thing missing is the bow on top. To the point and with authority!

jerix · 07-13-2009, 07:56 AM

I placed a heavy object on top to keep him still.

Got2LoveGadgets · 07-13-2009, 08:20 AM

I have just installed and Auralex Sub Dude HD (not sure what the HD stands for) and it does a great job of stopping my living room from rattling! Worth a try as its cheap

jomari · 07-17-2009, 04:58 PM

Quote:

Originally Posted by Got2LoveGadgets

I have just installed and Auralex Sub Dude HD (not sure what the HD stands for) and it does a great job of stopping my living room from rattling! Worth a try as its cheap

The HD stands for the 20 bucks your paying to have em 'beautify' that isolator. its pretty much a subdude but prettier.

chemokidd · 07-17-2009, 06:48 PM

yea I have my sub in a small room and it use to do the same thing. so I made a riser & its prefect

its worth the time trust me!

MyKill Myers · 07-17-2009, 07:16 PM

My Klipsch Synergy 12 down firing sub already has feet that raise the sub slightly. I'd imagine that making a riser would still help and be a fun project for me regardless. When fabricating the riser, should I cut a hole in the platform that matches the circumference of the driver since it is downfiring or would the platform be better off without a hole?

Thanks in advance for your opinions!

Fors* · 07-17-2009, 07:27 PM

Quote:

Originally Posted by MyKill Myers

My Klipsch Synergy 12 down firing sub already has feet that raise the sub slightly. I'd imagine that making a riser would still help and be a fun project for me regardless. When fabricating the riser, should I cut a hole in the platform that matches the circumference of the driver since it is downfiring or would the platform be better off without a hole?

Thanks in advance for your opinions!

I have a riser for my downfiring sub, and I have no hole (pics in my gallery). I think it sounds great, and I helped to further dial it in with an SPL meter, which I recommend. I would help to dampen the sub by adding some acoustic foam or something similar under the riser platform to help absorb the frequencies that may create any possible standing waves from occurring. Also, placing it on a rug if you have ceramic tile/concrete is a good idea as well (I have a ceramic floor in my basement).

My sub came with a small “riser” as well, but there was no hole in it, so I would think there is no benefit to having a hole in the actual sub riser you would build.

MyKill Myers · 07-17-2009, 07:31 PM

Thanks Forsberg21

Fors* · 07-17-2009, 07:41 PM

Quote:

Originally Posted by MyKill Myers

Thanks Forsberg21

.

I don't know if you read this sticky, but it is a very good read from our own Big Daddy about how to build sub risers and their effects.

https://forum.blu-ray.com/showthread.php?t=103410

talstarone · 07-17-2009, 07:58 PM

Quote:

Originally Posted by forsberg21

.

I don't know if you read this sticky, but it is a very good read from our own Big Daddy about how to build sub risers and their effects.

https://forum.blu-ray.com/showthread.php?t=103410

Forsberg and others have built some Great Risers.As Big Daddy says a Sub Riser(or getting the sub off the floor and having some material to dampen the vibrations can make a sub sound worlds better).

I built a DIY Sub Riser for my Polk PSW10 and it made a huge difference how well the sub performed.Well worth the little amount of time and the low cost in materials(Maybe $20 to $30).I have pics in my Gallery under Sub Riser...

MyKill Myers · 07-17-2009, 07:58 PM

Yeah been reading it for over an hour. Can't wait to clock out for the weekend, get to work and test it out!

Fors* · 07-17-2009, 08:01 PM

Quote:

Originally Posted by MyKill Myers

Yeah been reading it for over an hour. Can't wait to clock out for the weekend, get to work and test it out!

Once you have all the material, it takes only about 1 hour to do. Very easy indeed!

07-06-2009, 04:44 PM	#1
equalls Active Member Member since:Mar 2008 Trading Score:24	Reducing Subs Vibrations I recently upgraded my sub and now with my new one, even at low levels my whole apartment building shakes. I live in a older building so it makes the stair well outside shake and should like an earthquake. I was wondering if there is something i could set it on or a stand i could build to help with this problem. Thanks

07-06-2009, 05:26 PM	#2
LaMp-PoSt-MaFiA Member Member since:Aug 2008 Location:Ohio U.S.A. Home Theater Gallery:10 Blu-ray collection:238 Blu-ray reviews:12	volume! try turning the volume on your sub down a bit

07-06-2009, 10:47 PM	#8
Big Daddy Blu-ray Champion Top ranked HT gallery Member since:Jan 2008 Location:Southern California Home Theater Gallery:79 Blu-ray collection:122 Trading Score:1	If the sub is in a corner, move it away from the walls slightly. Subwoofers tend to become loud and boomy in a corner. Experiment with other sub locations in the room to get good bass sound without creating an earthquake. Turn the level on the back of the sub to 50%-60%. Turn the crossover on the back of the sub all the way up to its maximum point. Set all your speakers to small and adjust their crossovers. Usually 80Hz is a good start, but you can use other crossovers depending on your speakers. Run the auto calibration program to calibrate all your speakers, including the subwoofer. Alternatively, you can buy a digital SPL meter from Radio Shack and do the calibration manually. Put a thick area rug under the sub. Open the sub. Add some polyfill to it without overstuffing it. You can buy polyfill from Wal-Mart for less than $5. Make sure it is flame retardant. Put the sub on a riser and put dampening material under it.

07-17-2009, 07:16 PM	#14
MyKill Myers Member Member since:Jan 2008 Location:Abingdon, MD Blu-ray collection:147	Down Firing Sub My Klipsch Synergy 12 down firing sub already has feet that raise the sub slightly. I'd imagine that making a riser would still help and be a fun project for me regardless. When fabricating the riser, should I cut a hole in the platform that matches the circumference of the driver since it is downfiring or would the platform be better off without a hole? Thanks in advance for your opinions!

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07-06-2009, 05:39 PM	#3
aramis109 Blu-ray Ninja Member since:Mar 2008 Location:Milwaukee, WI Home Theater Gallery:10 4K collection:4 Blu-ray collection:360 Trading Score:18	What equipment do you have? A sub isolation riser similar to the home built ones or the Auralex Gramma will help reduce some of the vibrations you're getting. Some room treatment like sub traps will help as well. You may want to consider turning the sub down a bit as well and playing with placement- perhaps you have it too loud because it's not in a good spot? I've seen plenty of people say "I have it all the way up and don't get good sound" because it's in the wrong area for where you're sitting. Meanwhile their house is falling down around their ears.

07-06-2009, 06:05 PM	#4
equalls Active Member Member since:Mar 2008 Trading Score:24	thanks for the help. I have the sub a the lowest level and it still vibrates everything. The building is really old and probably not built very well. I was wondering if some foam or padding underneath it would help.

07-06-2009, 07:35 PM	#6
typ44q Senior Member Top contributor Member since:Apr 2009 4K collection:61 Blu-ray collection:624 DVD collection:70 Trading Score:1	I have a auralex gramma and it works very well to isolate the sub from vibrating the floor and everything around it. If you are going to build one yourself just make sure you are looking at the plans for an isolator and not just a riser.

07-13-2009, 07:56 AM	#10
jerix Member Member since:Aug 2008 Location:Philippines	I placed a heavy object on top to keep him still.

07-13-2009, 08:20 AM	#11
Got2LoveGadgets Active Member Member since:Oct 2007 Location:UK Home Theater Gallery:8 Blu-ray collection:100 Blu-ray reviews:4	I have just installed and Auralex Sub Dude HD (not sure what the HD stands for) and it does a great job of stopping my living room from rattling! Worth a try as its cheap

07-17-2009, 06:48 PM	#13
chemokidd Expert Member Member since:Dec 2008 Location:Nashville, TN Home Theater Gallery:30 Blu-ray collection:108 Blu-ray reviews:8	yea I have my sub in a small room and it use to do the same thing. so I made a riser & its prefect its worth the time trust me!

07-17-2009, 07:31 PM	#16
MyKill Myers Member Member since:Jan 2008 Location:Abingdon, MD Blu-ray collection:147	Thanks Forsberg21

07-17-2009, 07:58 PM	#19
MyKill Myers Member Member since:Jan 2008 Location:Abingdon, MD Blu-ray collection:147	Yeah been reading it for over an hour. Can't wait to clock out for the weekend, get to work and test it out!

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