[Ichinichi]

I have a Sony 555 ES that I spent way too much on to get rid of, that and my Beethoven Collection is firmly imprinted on 87CDs. So...

Setup:
I've got two solid maple platforms, each resting on three solid cone feet that are mated to floor discs.
The first platform is a 100lbs maple block on which I have my Sony 555ES SACD player and next to which is my Jolida 102B amplifier.
Behind this platform is the second platform, also solid maple, weighing 45lbs.
There is a piece of carpet on top of this to keep the ACI sub from vibrating itself off the platform.
The ACI sub is on its brass cone feet. The Sony and Jolida sit on the larger maple block on their stock feet.
Center-to-center, the ACI sub is about 2 feet away from the CD player.

The Problem:
My CD player is skipping when bass gets going.

I have had a very similar organization of components in a carpeted concrete floored apartment, with no problem (the sub behind CD player and amp by about 2 feet). Which leads me to think that its not the proximity of the sub to the CD player but rather how springy the floors are here in my new place. But I don't want to drop $$ on isolation feet for the CD player if I'm wrong.

Please help.

[cruz123]

Turn off the sub while playing music and see if that eliminates the skipping.  If so, you know you will need to either relocate the sub or better isolate the CDP. 

[Ichinichi]

so you think it is the interaction of the springy floor and mechanical vibrations of the sub causing the CD to skip? and not the bass resonating with the CD player directly given the proximity of the two components?

[lonewolfny42]

so you think it is the interaction of the springy floor and mechanical vibrations of the sub causing the CD to skip? and not the bass resonating with the CD player directly given the proximity of the two components?

Ichinichi ....Did you try this suggestion ?

Turn off the sub while playing music and see if that eliminates the skipping.  If so, you know you will need to either relocate the sub or better isolate the CDP.

But I don't want to drop $$ on isolation feet for the CD player if I'm wrong.

Since your local is in the GAS guys area.......see if any members can loan you a set of feet to try....

[Ichinichi]

so you think it is the interaction of the springy floor and mechanical vibrations of the sub causing the CD to skip? and not the bass resonating with the CD player directly given the proximity of the two components?

Ichinichi ....Did you try this suggestion ?

Turn off the sub while playing music and see if that eliminates the skipping.  If so, you know you will need to either relocate the sub or better isolate the CDP.

But I don't want to drop $$ on isolation feet for the CD player if I'm wrong.

Since your local is in the GAS guys area.......see if any members can loan you a set of feet to try....

Sub off, no skipping. No super low bass, no skipping. I don't think it skips even with the cannons in the Cincinnati Pops rendition of 1812 Overture. It skips when we're talking about hip-hop/RnB/rap synthetic bass.

I might just pick some up or try tennis balls first.

[Scott F.]

Hiya Alan,

If you try tennis balls, those would probably have to go under your maple platforms as they are going to be fairly stiff. If you are looking to put something under your Sony, try one of those Gel pads that they sell to support your wrist for a keyboard or a mouse, They have a very low Durometer rating and should do well in absorbing the structure borne vibrations. You will need to cut that into small squares of about 1" to 1 1/2". An old mouse pad cut into squares (about 1") and stacked a couple high will also work quite well under your maple platforms.

Both are cheap, easy and effective isolation means so you won't have to spend hundreds on 'audiophile approved' stuff.



...ps. I still don't have my crossovers done 

[funkmonkey]

I have heard that these work well : Bounce No Bounce Balls shop around the net for a better price.  I think the "no bounce" balls would be the ticket.  smaller than a tennis ball for sure...  I am sure that I saw a 1" version somewhere.

[golfugh]

Drop in on Herbie's circle and see what he thinks.
Mark

[ricmon]

Ichinichi  it seems to me that with a CDP there should be no condition that creates skipping from external vibration source.  Maybe you should concider having the CDP checked out.  maybe there is something not quite right inside of the CDP.

Ric

[Ichinichi]

Ichinichi  it seems to me that with a CDP there should be no condition that creates skipping from external vibration source.  Maybe you should concider having the CDP checked out.  maybe there is something not quite right inside of the CDP.

Ric

Hi Ric! Your assessment is a surprising one to me and my limited knowledge; why is it the case that a CDP should never skip?

[Ichinichi]

Drop in on Herbie's circle and see what he thinks.
Mark

Thanks, Mark. That's a good idea.

[Ichinichi]

I have heard that these work well : Bounce No Bounce Balls shop around the net for a better price.  I think the "no bounce" balls would be the ticket.  smaller than a tennis ball for sure...  I am sure that I saw a 1" version somewhere.

thanks for that...so as a ball falls from stationary, its potential energy (PE) is converted into kinetic energy (KE) between release and impact. the bounce part is observed due to the translation of the PE from compression into KE (upwards movement). So no bounce will absorb all the KE of a vibrating floor, no? Are my directions reversed?

[Ichinichi]

Hiya Alan,

If you try tennis balls, those would probably have to go under your maple platforms as they are going to be fairly stiff. If you are looking to put something under your Sony, try one of those Gel pads that they sell to support your wrist for a keyboard or a mouse, They have a very low Durometer rating and should do well in absorbing the structure borne vibrations. You will need to cut that into small squares of about 1" to 1 1/2". An old mouse pad cut into squares (about 1") and stacked a couple high will also work quite well under your maple platforms.

Both are cheap, easy and effective isolation means so you won't have to spend hundreds on 'audiophile approved' stuff.



...ps. I still don't have my crossovers done 

Good point, Scott. I was thinking vibrapods again; sorta regret selling mine

If I stomp around the CDP with sub off, it skips as well; I'm guessing its structurally translated vibrations that cause the skipping.

Think I can put it on top of several of the 2" thick packing foam sheets that came with my ACI sub? That would be a poetic resolution!

PS: I still haven't done my xover's ether. Damn it!

[Wayner]

You can put the CD player on 10 ten tons of granite and it won't do any good. However, if you apply some weight to the top side putting downward pressure on the CD player, your problem will go away if it's due to airborn vibration.

Wayner 

[ricmon]

Ichinichi  it seems to me that with a CDP there should be no condition that creates skipping from external vibration source.  Maybe you should concider having the CDP checked out.  maybe there is something not quite right inside of the CDP.

Ric

Hi Ric! Your assessment is a surprising one to me and my limited knowledge; why is it the case that a CDP should never skip?

I don't have any technical expertise in this stuff.  It just seems that since the CDP is only reading dots (or dips) and there is error correction built into all data reading devices and that the leaser is not in actual in contact with the surface of the cd............well vibration should not be a problem.  Sharp jolts are another thing but a car CDP usually won?t skip on reasonably bumpy roads.  However I could be very wrong.

good luck
Ric

[funkmonkey]

I have heard that these work well : Bounce No Bounce Balls shop around the net for a better price.  I think the "no bounce" balls would be the ticket.  smaller than a tennis ball for sure...  I am sure that I saw a 1" version somewhere.

thanks for that...so as a ball falls from stationary, its potential energy (PE) is converted into kinetic energy (KE) between release and impact. the bounce part is observed due to the translation of the PE from compression into KE (upwards movement). So no bounce will absorb all the KE of a vibrating floor, no? Are my directions reversed?

yep, you got it.

another thought I just had would be to contact Tempur-pedic and request their free sample (and DVD).  When you get the chunk of foam in the mail, use it to damp the CD player...  if it can stop a glass of wine from spilling over while some chick jumps on the bed...  it should be able to prevent your CD player from skipping due to a bouncy floor. 

[Ichinichi]

I have heard that these work well : Bounce No Bounce Balls shop around the net for a better price.  I think the "no bounce" balls would be the ticket.  smaller than a tennis ball for sure...  I am sure that I saw a 1" version somewhere.

thanks for that...so as a ball falls from stationary, its potential energy (PE) is converted into kinetic energy (KE) between release and impact. the bounce part is observed due to the translation of the PE from compression into KE (upwards movement). So no bounce will absorb all the KE of a vibrating floor, no? Are my directions reversed?

yep, you got it.

another thought I just had would be to contact Tempur-pedic and request their free sample (and DVD).  When you get the chunk of foam in the mail, use it to damp the CD player...  if it can stop a glass of wine from spilling over while some chick jumps on the bed...  it should be able to prevent your CD player from skipping due to a bouncy floor. 

  OH SNAP.