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Designing VPI HRX turntable stand long

I just brought a VPI TNT HRX turntable home, and it won’t fit on anything I have. I thought I would get a 4” maple butcherblock platform (as recommended by Harry Weisfeld, designer, said one post) locally and be able to set up right away on top of one of my stands. Unfortunately, I found I could only order one of these through local lumber yards. Since I was going to have to wait anyway, I looked online for butcherblock and found Timbernation.com (Chris). Scrolling through the products, I saw a sandbox he had made for a customer’s amp, which reminded me of the Big Rock sandbox affair I have used with good results in the past. Hmm, put legs on it and I have a turntable stand at a reasonable cost. I emailed Chris last night and he got back to me today (Sunday). His website indicates that he can build whatever I want, so I am looking for some input into the design.

The physical information:
-the table has a footprint of 25x29
-the chassis (all metal prototype, not the acrylic/metal sandwich current production model) weights 70 lbs.
-the motor/flywheel assembly weighs 34 lbs. and fits inside the footprint
-the vinyl platter weights 17 pounds without perimeter ring and is 13.5” in diameter with the ring
-the metal platter (the original platter) weighs 27 lbs and is 11.5” in diameter
-the outboard SDS is 19x9x4 and is relatively light

Issues:

1. materials: what wood would sound best (maple, cherry, walnut, etc.), how should it be assembled (butcher-block or laid out flat; Chris’ website says there is no such thing as a single block of wood of requisite size), and how thick should it be? I don’t imagine the manner in which the wood is finished will make a difference.

2. sand: how deep should the sand be underneath the wood slab and should the sand go up the sides between the slab and the box it sits in? If not, what should go between the slab and the box?

3. dimensions:
a. the slab has to be at least 25x29, of course, but at least a 1” border around the footprint would make sense, making the slab 27x31;
b. I was thinking the slab should be level with the sandbox, so if the slab is 4” thick and I use 1” of sand, the box would have to be 5” deep;
c. How much space between the slab and the box, one inch, ½ inch?
d. How tall should the stand be? I’m used to a turntable at eyelevel on a wall platform, but that is not going to happen. Ergonomically, 25” seems good for standing upright over the table and changing records, but making it higher would make it even better. However, I don’t want to compromise stability for a couple of extra inches.
e. How thick should the sides and bottom of the box be, the legs and any shelves? (Chris would probably know.)

4. shelves:
a. first, whether to have them at all. Will they affect stability (maybe improving it by cross bracing)? Will they affect sound (by adding vibration carrying elements)?
b. How many?
c. Where placed?
d. It would be nice to have all my turntable paraphernalia in one place, so storage use if shelves are employed: SDS, 2d platter, dustcover (maybe hang from side of stand on pegs?), peripheral ring, center clamps (2 – original screw on and later weight only), setup equipment, stylus force gauge, demagnetizer, stylus cleaners, brushes, etc., the playing LP cover/inner sleeve/outer jacket, LPs in current rotation.

5. miscellaneous:
a. leveling the table with adjustable feet?
b. ???

I would appreciate any input before I finalize the design with Chris.
128x128suttlaw

Showing 2 responses by salectric

salectric
756 posts
 
Suttlaw, my search for the best sounding stands and platforms for my equipment is still underway. I am using my Galibier on a 3/4" thick maple butcherblock shelf from Bed, Bath and Beyond, which is supported in the corners by the solid oak posts of a DIY stand. (Surprising as it may seem, I prefer that to the 3" thick platform from Timbernation.) My favorite mounting for my power amps is a solid walnut platform resting directly on the carpet. My preamps sound best on a short nesting table made of solid oak. I have not tried most of the (expensive) commercial offerings since I prefer to do things myself where possible. My next project will be a sandbox for the turntable where I can try different materials for the floating shelf.

My reason for posting here was not to say what is best, but rather to issue a caution about assuming that a thick maple BB platform will solve all of your problems.

My experiments to date lead me to two conclusions: First, different shelves and stands can sound dramatically different. Second, two people can reach opposite conclusions about which material sounds best. Ultimately, like most things in home audio, you have to try something yourself and reach your own conclusions.

Dave
salectric
756 posts
 
Rushton, The Prologue does look great! A couple questions come to mind: Is the 3.5" thick Prologue Shelf attached in any way, or is it just resting on the top shelf of the rack? And if just resting, is it resting directly on the shelf or are there spacers of some sort?

Suttlaw, I bought a 3" thick maple butcherblock shelf (18 x 24) from Timbernation and I was very pleased with the quality of his work and the fast service. However, for my tastes, the maple BB platform does not sound good. I have tried it under my Galibier turntable, my tube power amps and my tube line stages, and in all uses I observed the same characteristics: very smooth midrange and treble, BUT it is dead and lifeless and it lacks bass power and dynamics. Now I know that flies in the face of lots of reports to the contrary, and you can take my comments with a grain of salt. The only reason I am reporting my findings is to warn you to try the thick BB first in a limited way, such as a single shelf, before committing to a major stand or rack using multiple BB components. You may find it is just great or you may find, as I have, that the shelf doesn't have a home in your system. And yes I tried the usual types of shelf accessories: Mapleshade Isoblocks and brass cones, sorbothane spacers, brass spacers, maple cubes, etc. This is truly a case where YMMV.

Good luck!

Dave
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