Squash Balls or Spikes...Maybe both!!??

[JRKO]

My appartment has concrete floors with foam layer then a chip board layer on top.

I have found some sound proofing underlay and am laying wood on top op that. So

Wood Flooring
Sound proofing underlay
Chipboard
Foam
Concrete

My speakers are 15inch Tannoy DC's in a Berkerley cabinet which weigh about 41kg each. Oh yeah....I'm on the first floor!

I need to make sure I don't p##s off my neigbours with the new hard flooring.

Which would be best spikes or squash ball cut in half or........?

 

[inertial]

Bad vibes!

(sorry for my english)
Hi JRKO,
search on the stereophile's archives " BAD VIBES " by Shannon Dickson.
The conclusion is symple : without mechanical knowledge you can't
design any audio components!! 🙂
Good reading.

 

[JRKO]

My head hurts

Ok read that...

So solid spiking helps reduce minute see-sawing whilst the driver is on excursion....but some sort of complient material also stops vibration traveling through to the floor.

Although my base floor is concrete I have chipboard on top.

Any mix of say spikes and slightly complient materials can re-introduce the rocking.

Spiking alone will allow the speaker to 'dump' straight onto the floor. As this will be a laminate/real wood layer on top of a sound proofing underlay the flooring may well vibrate.

soooooooo...

Not including cutting out the flooring around the speaker and mounting it on the concrete...does anyone have any ideas?

PS the cabs weigh about 40kg now and may get heavier!

 

[inertial]

(sorry for my english)

You must to souspend the cabinat at a subsonic resonant frequency
(1-2 Hz) with the minimun possible damping.

Not possible with rubber balls or similar ( you can try.......)
It is possible with " AIR SPRINGS"
warning : the result will be incredible. 🙂

P.S. 😛ut the spikes six feet under !
Hi.

 

[Bill Fitzpatrick]

inertial:

Could you give us more detail on air springs and outline you experiences with them?

 

[JRKO]

Air springs under speakers


please tell me more...and dont worry your english is better than my technical understanding. I tey to make up for it with enthusiasm!

 

[5th element]

My speakers are spiked and sit ontop of paving slabs, which inturn sit on the carpet with a thick underlay, I like the sound and I dont think it travels too far.

 

[JRKO]

5th Element

From reading those articles spikes and slabs will directly couple you speakers to the floor.....blah blah blah etc etc


Someone help PPPPPLLLLLEEEEESSSSEEEE

I dont have the feintest idea now I have read those articles.......


ANYONE?

 

[Bill Fitzpatrick]

How about real skinny spikes, like a nail. Drill small holes in the flooring so the spikes can pass through to the concrete. If possible, use 3 for a tripod arrangement.

 

[carlosfm]

How about real skinny spikes, like a nail. Drill small holes in the flooring so the spikes can pass through to the concrete.

His wife will kill him.

 

[JRKO]

Bill F, I live about 20m from a tidal river and I can't enjoy listening to my system from a black bag on the riverbed at high tide!

Next idea........

 

[Bill Fitzpatrick]

Not the boss, huh? Big mistake.

 

[carlosfm]

I use 3 spikes on my speaker stands, and then I use Harmonix spike bases similar to these (mine are black):

http://www.positive-feedback.com/Issue14/harmonix.htm

Position your speakers carefully, take your time.
Then put these under the spikes.
These have a kind of a rubber that after some time,with the speakers weight, will stick to the floor (although they can be removed quite easily).
They work very well, better than the spikes directly on my pavement.
Also an advantage is that you can cake your speakers out, but their position is marked, these bases will be sticked on the floor, you know exactly where to put your speakers back again.

 

[JRKO]

My wife tells me when I am the boss!

I have been promising her hardwood flooring for about 2years so once we get it I had better look after it. There is NO WAY I am going to be the first to damage it! Not by accident or drilling through it!

Ill try the 3 spike arrangement on those puck things.

Here are my babies

 

[phase_accurate]

Just two tips:

1.) Play around with placement until both criteria are met: It sounds good AND your wife is content. So there is at least some guarantee that they don't have to be moved anytime soon.

2.) Go and drill the holes one fine day when your wife is not at home .........

Regards

Charles

 

[inertial]

bad vibes 2

(sorry for my english)
Hi boys,
Well, mass for compilance = resonant frequency (Fr) ,ok?
two possibility :
a) Fr into audio-band . The system work on " elastic reaction" ( this is bad thing)
b) Fr below the audio-band . The system work on " inertial reaction"
( this is good thing)
If you use spikes you can obtain Fr max 3-4 Khz and minimum some hundred Hz , it depends.
Yes, spikes = springs , ok?
The goal is to obtain a subsonical Fr so the "forces exchange" is minimum and the relative immobilyty is preserved (= no vibes).
Spikes pseudo-theory is a storical error ( or a mistification?),
if you design a high-end speaker ( or any audio component) with
a"wonder" set of spikes you don't know basic laws of mechanics.
I hope my translate be decent ( i'm not sure..) and excuse me for too much technical simplifications, but the " subject " ( vibes) is too much difficult for me( in english 🙂 . )
Experience: put 3 air spring under the speakers, then the source,
then the preamplifier........
In USA , look at the Newport air spring.
They are much expansive , but the concept is simply !
With a bit of fantasy .........
DO IT YOURSELF ! 🙂

Hi

 

[JRKO]

push bike innertubes anyone?

 

[carlosfm]

1.) Play around with placement until both criteria are met: It sounds good AND your wife is content. So there is at least some guarantee that they don't have to be moved anytime soon.

That's the right approach.😀

 

[JRKO]

mmmmmmm

Any ideas on how to make a push bike innertube presentable?

 

[carlosfm]

I wouldn't use that under speakers...

Do those things still exist?
Most tires nowadays are tubeless.😀