self made rack picture

That's a fantastic idea. Certainly helps isolate from floor-borne resonance!

You may start off a trend/cult. I'm sure many will ask you for details on ceiling fixings and how to attach the steel rope to the shelves.

Andrew

Andrew Randle
2B || !2B;
4 ^ = ?;

I'd even say that it might be pretty ready for the market, especially for those whose wife loves cleanliness under the furniture.

Being completely useless in terms of manual skills, I imagine that the setup might have been quite a hassle. In this context, why not design a (not too visible) square frame of the same size as the MDF plates, designed to be fixed on the ceiling and which already has the necessary hooks at the right place ?

It's maybe gonna be your first million.

Apart from that, I hope you haven't unintentionally started up another Mana thread by your input ... If your setup sounds good for that little money, some Mana-owners might express some jealousy ...

Bernard

Maybe even springs between shelves?

Very attractive, but I can already see my two hear old trying to climb onto his new 'swing' )

Andy.

Andrew L. Weekes
alweekes@audiophile.com

While the idea is great for CD Players and amplifiers, there is a big problem in applying it to loudspeakers.

With loudspeakers you need stability and rigidity, mainly for the sake of the tweeters. A strong bass note would otherwise knock the phase of the tweeters out and blur the presentation.

Andrew

Andrew Randle
2B || !2B;
4 ^ = ?;

quote:

---

Assuming that Andrew's problem with the tweater is about the relative change of the position of the 'speaker to the listener (re: bass note moving the 'speaker alignment on a suspended stand) - how about the listener is also suspended - and one of the following is used:-

---

True, I am writing about the *absolute* phase change of the *whole* loudspeaker. Let's take an extreme example - if I were to mount a loudspeaker on one of those swinging Catholic incense burners... Also, it is the higher frequencies that are more susceptible to larger swings in phase change with distance - tweeters are also responsible for most of the timing of the loudspeaker.

quote:

---

but a sensor picks up movement in the 'speaker, electrically passed this to a servo which moves the listeners suspended position relative to the notes 'suspended 'speaker positional distortion'

---

Or you could attach the listener to the same swinging contraption

Andrew

Andrew Randle
2B || !2B;
4 ^ = ?;

[This message was edited by Andrew Randle on TUESDAY 20 March 2001 at 19:57.]

Andrew

Andrew Randle
2B || !2B;
4 ^ = ?;

Andrew

Andrew Randle
2B || !2B;
4 ^ = ?;

could I please "ask you for details on ceiling fixings and how to attach the steel rope to the shelves".

cheers, Martin

Bernard:

Schwarzie

Nothing happens when Arnie pushes the play button,
but when he opens the CD drawer the rack shakes a bit, not rally a problem.
An improvement would be when i hang a heavy shelve under the last mdf shelve(marble or granite). This would make the whole construction
more stable.

Square frame
Yes,
but not when you have half-width naim gear.

Levelling,
is easy, more about, later.

Martin,Lance

Details
For details i have to make more photos, needs about a week.
I will send it in this tread, or sell it for 10$ each.

Regards, Wolfgang

one more photo....?

quote:

---

That's a fantastic idea. Certainly helps isolate from floor-borne resonance!

---

Yeah but now you get ceiling-borne resonance instead!!!! Still an interesting idea though, and if you could put a few springs in it may get really interesting.
John

Andrew

Andrew Randle
2B || !2B;
4 ^ = ?;

quote:

---

Nothing happens when Arnie pushes the play button,
but when he opens the CD drawer the rack shakes a bit, not rally a problem.
An improvement would be when i hang a heavy shelve under the last mdf shelve(marble or granite). This would make the whole construction
more stable.

---

Think it might be better to use shock-cord then springs and steel cord as it has much better dampening.

Matthew

quote:

---

Which is worse, floor-borne or ceiling-borne vibration?

---

Well quite often the ceiling is attached to the floor above so I imagine they will be very similar.

quote:

---

...and why does a wallshelf often sound better than a floor stand?

---

That would depend on the construction of the wall and floor in question. Also in some cases, especially with turntables, the suspension system has been design to cope with the motion of the floor in the vertical plane so attaching it to a wall which moves in the horizontal plane will be a bad idea.
John

i think the floor borne are always more, except
you have DBL´s in a 15 m2 room or your speakers be suspended.
It also depends on what your dwelling/house is made of. If you have a concrete floor and a wooden ceiling (very rare) you will not need
a hi-fi swing.
My floor is made of wood, with a lot of vibration.I have tried two notable Rack`s without improvement(maybe because they were standing between the speakers)however, my ceiling is made of concret and i have no vibration on my rack, but a huge improvement in bass and airy it`s the right solution for me.

Regards, Wolfgang

Regards,Wolfgang

Nice one !

It just so happens that as part of the house revamp,that the living room is due for redecoration in a few months,

I strongly suspect that I will be attempting something similar in the month or so prior to the decoration as I suspect that holes in the living room ceiling will have a low "WAF" factor,but since this would only be a temporary arrangment till the redecoration...I might just get away with it !

...Temporary,only unless I like it,in which case it will stay

Regards

Chris