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Hi
I have a Finite Elemente spider rack which I use on a wooden floor in my listening room which is suspended above our garage. On very loud passages of music the cd player occassionally skips which obviously indicates an isolation issue. Can anyone suggest what I should use to remedy this. I am using the standard spikes to the floor that come with the rack as standard and a SRA isolation base under the cd player which in turn sits on the Elemente rubber grommetts.
Thanks
FF
Follow Ups:
I have a suspended floor and found that some horizontal isolation improved the performance of my Wadia 861 CD player. My rack system is the Lovan Sovereign, with the legs and horizontal tubes treated to reduce resonances. The shelves have been replaced by beams which are also damped.
This tripod system couples the equipment firmly to the floor and is rigid against horizontal flexing within the rack. On a suspended floor, this couples floor motion to the equipment. Unless the rack is exactly at a center point between supports, the floor motion is one of bending rather than strictly vertical. This means the motion translated to the equipment includes a lot of horizontal as well as vertical displacement.
Since CD players use servo mechanisms to track the lasers along the CDs, horizontal motion at the player creates additional problems for the servo. My solution was to make DIY roller-ball suspension devices and support the CD player directly on the ball bearings. With the weight of the Wadia, this creates a good low-pass filter against horizontal vibration. The only down-side is that the free rocking motion makes it difficult to use the control buttons on the player: I use the remote control exclusively.
Symposium Rollerblock and Finite Elemente Ceraball are finished commercial products that use the same geometry. If you are handy, you can make your own.
nt
I might be reading it wrong, but I find it strange that you’re getting skipping with that much isolation (the SRA alone should do the trick). Maybe others can chime in about that. But if you’re convinced that it’s a lack of isolation, check out Finite- Elemente’s Cerabase. I think that F-E recommends it as an upgrade under their racks. A set of four, if I recall, will set you back close to a grand, but they’re very effective. Check out the link:
http://www.musicdirect.com/products/detail.asp?sku=AFINCERABASE
You might want to try that, too. I think Music Direct offers a 30-day money back on the Cerabases. If they don't solve the problem, you can return them and possibly look into stiffening the floor. Good luck!
Hi Quint
I too was surprised that the SRA alone did not cure it. My dilema is do I pay a further grand and put the Cerabases under or just go for the Pagode, hoping that does the trick.
Thanks for the follow up
Cheers
FF
I have the Ceraballs and like them a lot.
BUT... you might approach this from a different angle.
IF your floor is sending vibration up into the rack, then making the floor more solid might do the trick.
What we (ex pat) Poms call an acro (adjustable metal support you can jack up under the floor beams) might make everything rigid enough to suppress the vibration.
Alternatively you could look at isolating your speakers from the floor.
This has, in my experience, always produced good results in isolation and the bonus of clearing up any bloat in the midbass.
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