Isolation platform for non suspended turntable?

Adding a spring-type base, or one with rubber, or one with air bladders, is simply making your turntable a suspended turntable, instead of an unsuspended one.

If you want to make the most of your unsuspended turntable, then you should look at stands which are generally suited to unsuspended turntable use. These would generally be a high-mass rigid stand that is relatively low to the floor, but still high enough to be convenient for changing records.

Adding a suspension under a TT, has never had any attraction for me.

I would tend to agree. That is why I have my Well Tempered on a two shelf, solid cherry post stand (My design) that is spiked. It also rests on a (DIY) 75lb sand box that has a separate plinth for the motor.

However, if Ozzy62 says this spring suspension has improved the sound of his table I won't disagree with him. The proof is in the pudding!

I have always liked rigid coupling of components better than air suspended and the like. But the Promethean under my 'table is a great improvement. Better than a Sistrum SP-1/Neuance combo sitting on my Adonis rack. And I don't mean by a small margin either.

Hey, it's a pain in the ass to have the table situated that low. I assure you if the benefits didn't far outweigh the inconvenience it would be situated on my rack. It sure looks better up there......

Oz

Guys who make granite countertops don't have much use for the sink cut-outs. They are often appropriately sized for turntables, and you can acquire them inexpensively. The granite guys will often square-up the sides and can even polish the sides, if you like. I got several for $10 each.

I put five 2 inch rounds of 1/2" thick Sorbothane on top of my shelf and under the granite. I then replaced the stock feet on my 'table, and replaced them with threaded-in cones. The tip of the cones fit into a small depression on flat discs. The discs sit on same diameter sized 1/8" thick Sorbothane, which sits on the granite. Made a huge difference on my non-suspended 'table for not a lot of dollars.

Granite comes in a wide variety of colors and patterns. Blue Pearl (a deep blue and beautiful granite), which comes from Sweden, is probably the most dense, closely followed by Emerald Pearl. Southern grey is an inferior granite, but Barre (Vermont) grey is a very durable and dense stone. There is also a black granite with gold-colored flecks. I forget its name, but it is stunning.

Happy listening!

Paul Frumkin

I tried spikes under my Well Tempered and it had a negative affect on the sound.