Isolation question. Monitor on Subwoofer


Just curious...

I have 2 subs, and due to space limits i have been thinking about going with Monitors and putting them on the subwoofers.

Here is my idea, if anyone knows if this will not work please let me know why.

Subwoofer on spikes.
On top of subwoofer either a marble or granite slab. Felt beneath the slab to keep it from scratching the top of the sub.
Monitor speakers coupled on small custom built stands (possibly built to hold sand or leadshot) to achieve the correct height, spikes on the stand which would sit on the granite above the subwoofer

Would this achieve decent isolation between the monitor and subwoofer? I see alot of speakers with built in subwoofers, or other types of speakers with the fullrange box and monitor on top, (GMA Continuims, Watt/puppy, etc)

Thoughts on this from you Coupleing/Isolation Guru's?

Would this do a decent job of isolation or should i look into other methods?
slappy
Yeah, next time i will be sure to arrive in full hockey goalie gear with a baseball bat and a can of mace! (laugh)
Slappy, "She sure seemed human untill she go me home"?
What the heck, are you typing in tounges? Boy she musta hurt you bad! You better lather on the Ben-Gay, prior to your next encounter!
Damn tom, that is one hell of an answer! So, in a short-assed version it wouldnt work, thanks for the alternate suggestion, ill have to look into these Audiopoints.

Audiobugged,
She sure seemed human untill she go me home. ;)
If you use Audiopoints, and I feel you should, then do not combine coupling with so called isolation..to do so would be the worst of combinations..The Audiopoints are designed to be directional..the point has a bandpass of 2hz to several meg..So you want to use Audiopoint 1.5's or 2.0's under the subs..On top of the subs you would then place 3 Audiopoint APCD coupling discs which impove point coupling on wooden surfaces and also protect the finish. Now you want to place, point down into the dimple of the discs Audiopoint 1.0's or 1.5's so your speakers sit atop the flat surface of the Audiopoints..This arrangement allows for a single exit point for the relief of vibration..You also have the benefit of wave launch enhancement..because you now have the possibilty of aligning the voice coils of the monitors with those of the subs below..You can carefully slide the monitor front to back on top of the sub..The APCD discs allow you to do this tweak easily..careful how you push.. you can knock the point out of the dimple..I have performed this procedure with several subs and monitors..Including my Servo15's..Someone mentioned marble atop a speaker that used some other type of points..doing so would slow down the possible exit path thru the point and provide a different exit speed thru the top of the speaker.Resulting in confusion...Tom .I am a Starsound dealer
Slappy, "A very painful and slightly traumatic night"? Are you sure she was human?

Sounds more like you hid a banana in your pants, & set a hungry monkey loose! Are your sure it's a spanish, & not a natural polish fly issue? You might want to get some rabies, & tetanus shots?

In laid-mans terms what you can achieve with the Bluedots is keep the monitors in place from the low-end rumble from the subs, & isolate so nothing resonates!

Instead of watt/puppy, you could name your final contraption after your last date - gorilla/chimp? :0)~
That is definatly a thing to consider. They might have been stupid when i met em. Unfortunatly i dont seem to attract the "Sane" variety very often. When i came to work yesterday people thought i had gotten thrown in a sack with a pack of angry wolverines. What a fun yet very painful and slightly traumatic night! ;)
Why do all the real cute ones turn out to be crazy eh?

Ok, maybe i need to go back in the forums and search up Couple/de-coupling, cause apparently i dont know what the hell i thought i knew i was talking about if you know what i mean.

I thought that De-coupling and Isolation were synonomous, that either one meant to give as little contact as possible to reduce the amount of vibrations recieved from other pieces of gear, while Coupling was the opposite, of which you are attempting to turn the object and what it is on top of into a single mass.

i better go hit the forums. Ive been dreading that couple/de-coupling thread though. Time to dive in
Slappy, I'm not touching your natural spanish fly issue, it would be too easy!!!

The Bluedots I feel would Isolate & Couple, & safe you all this propossed construction time.

Leaving you plenty of time to enjoy your system, & shake off the Women.

Rememeber Danny Bonaduce from the Partridge Family? You might wanna take a really, really, really good look at the women your attracting!!!

The other stupid thing to consider, are they stupid prior to going stupid over you? :0)~
Audiobugged, I like the way you think! ;)
Actually, ive been looking into some sort of a repellant. Probably due to some anomaly in the universe, girls get stupid over me pretty easily. You sure wouldnt think so if you met me though! I guess i have a natural spanish fly. I need a female Ce-coupler and a Slappy-Isolation system.

Anyways, Do the blue dots Isolate or Couple? I figured it would be best to get as little vibration to the monitors as possible from the subwoofer, but maybe im wrong and should try to get them act as a single mass?

This coupling/decoupling thing is a pain in the butt.
But the isolation cones do look cool. heheh
Instead of the marble slab, try putting your monitors on points (I use Audiopoints)and couple that baby to your already coupled sub. You know I'm a coupler. That may work..that's a big may, however....
peace, warren
Slappy, The Bluedots bond really well, & you might even break a sweat trying to pull the units apart? The best thing about a pack of 25 is you might have enough left over to adhere yourself another girlfriend?
I guess it depends...

If the box of your sub isn't too good meaning it physically shakes, then its better to put something heavy on top of the sub then put the monitors on top of that, mass loading. If the sub is pretty sturdy then...

you don't have to worry too much about physical vibration but mechanical vibration might or might not be an issue. Some kind of conductive cone ought to be used in this case with the pointy side down.

Do both of physical and mechanical vibrations are an issue. I think you'd know if mechanical vibration is an issue of you don't actually see the monitor vibrating while it's on top of the sub yet the sound is not right. I would imagine the speakers would sound thin and unprecise if you have mechanical vibration problems.

If neither physical or mechanical vibration is an issue, just get the dots stuff that audiobugged is suggesting.

I read somewhere that cats are great decouplers.
Slappy, Sound Anchors sells an item called BlueDots which are 1 1/2 diameter x 3/32 thick medium density sorbathane disks for use between speakers and stands. Sold 25 Bluedots in a bag, they are adhesive on both sides, however leave no residue, even after many years of use.


I agree. I am setting up RBH T-2P towers, and on these (and many other) speakers the monitors dock on top of the subs...

John
well...I dont see why your idea wouldn't work...kind of a homemade vr4 jr or watt puppy?...who knows.
I had thought of the straddle myself, but i figured the weight in the center with the outstretched legs wouldnt be the best way to do it.

Maybe i will just get David Blane to come by my house and levitate my speakers in the air.
lol...I was just pondering this last night...2 small velo hgs10's somehow under my monitors but with custom made stands that "straddle" the subs. I like your way better if it would work...hope we get some good advice.