Isolating a VPI Classic
PMCH (Paul) has become a really bad influence. After a wonderful experience when buying his PMC speakers, I couldn't help myself when his VPI Classic became available...
I need the help of our resident analog masters. I want to isolate the TT in the best way possible. I have been making stands for each of my components...so far, I've been using 1.5" thick solid walnut stands with brass cones placed on my rack (see pics below.) Would a similar approach be beneficial on the top shelf of the rack for a VPI Classic? Would it be more beneficial to use a walnut stand placed on isolation blocks and not use the cones for this application? Or, should I bypass the extra stand all-together? Thoughts? http://i881.photobucket.com/albums/a...ps971bd4d9.jpg http://i881.photobucket.com/albums/a...psd7dd155e.jpg |
Bump for ideas. The TT arrives tomorrow.
I guess the question is based in physics. The cones should help deliver energy away from the turntable, but in turn could deliver energy from elsewhere to the TT. The isolation blocks would absorb and deaden energy coming either way. I'm guessing that is the primary job of the feet of the TT. I'm assuming the cones would help "hook up" the turntable to the stand and rack...in turn acting as added mass to the TT? The isolation blocks would separate the TT from everything beyond the stand. What makes more sense here? :scratch2: |
Bump for ideas. Sorry I don't have any knowledge on the subject. The walnut rack is beautiful, the Classic 1 should look great on it.
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Why not just try the table on the rack as is and see if you actually have a problem before you do anything.
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I know VPI puts a lot of faith in the plinth/table alone. I would agree with Don, try the table first just sitting on the rack.
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My classic works great when placed directly on the rack. The isolation of the VPI feet is very good with no feedback problems whatsoever.
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I had a Gingko cloud platform under my VPI super scoutmaster.
It was the best $400 I have spent on my system.I don't know if they do them for the Vpi Classic.There are are reviews on the net for the effect on the SSM though. |
I owe it to you fine folks to report back on my findings.
First, the VPI Classic is a beautiful piece of equipment. Gawk-worthy in every sense. Second, when combined with the Soundsmith Zephyr, a Wireworld Platinum IC, and a choice piece of vinyl, the sound is magical. A freaky dead-black background like I've never heard with vinyl before. It bests the MVP881 with a SACD in every respect except when good vinyl is not available. Right now I'm listening to Alison Krauss and US, So Long So Wrong on MOFI 180 gram vinyl and the sound is amazing....so much air and the soundstage is HUGE! With Krauss, her crazy effortless high notes can sound a little digital on CD or SACD....vinyl smooths everything out. So cool. :music: The stand ended up making no noticeable difference to my ear. Placed directly on the top shelf of the rack, I could jump up and down right in front of the rack and get no noise. I could also knock on the top shelf and no noise would end up being produced through the Classic...extremely impressive. The final decision on going without the rack came because the height of the TT on the top shelf is at a perfect height for changing records....it just feels and looks right. :thumbsup: Thanks to all who responded with tips! Brent |
Brent, glad everything is working out so well for you. You will have to post a picture of the Classic on your walnut rack. Bet it looks fantastic.
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one word.... stillpoints.... talk to MasterLu for the deal...
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another word .... necro-threading....:D
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Sent from my iPad using A.Aficionado |
I didn't mean to imply the advice was bad. I just thought a one year gap between question and answer was funny.
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I also had a bit of acoustic feedback on the SSM that the Cloud 12S eliminated completely. |
When I was installing discos in the 70's and 80's we had two choices, mass was one and the other was a tuned suspension. Mass was the easiest, just fill a well constructed box with sand and a heavy steel top. But some times that didn't work. Especially when the DJ booth was on a suspended balcony or hung off a wall. Then the only choice was to tune the mounting platform and select a cartridge, tone arm combination that wasn't effected by the resonant frequency of the mounting. There were a few companies that made platforms for disco TT to sit on that you could tune by adjusting the feet. Some worked most didn't. There was one company that had three different platforms with different frequency tuning. They worked well but I don't know if they are in business any more. A nice heavy piece of steel with a choice of springs worked for me on a few occasions, when using QRK tables Why QRK, because the owners wanted instant acceleration and be able to slip Q, too. Sl 1200 were a great feedback solution TT but they couldn't come up or hold speed like a puck driven TT. And you needed the mass to reduce the TT table rumble. We used external pre-amps with 30 HZ filters to calm down down the QRK imperfections with Stanton cartridges.
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Stillpoints under VPI Classic
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John |
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Eric |
I really like my Symposium Segue ISO platform with the springs on the bottom. I could hear an improvement as soon as I placed it under my Classic 3. Replacing the footer inserts with Symposium inserts also improved the sound quality for me. I don't have my TT on an expensive stand though.
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Hey Guys...I am having an issue with Low Frequency rumble. I own a VPI classic signature. Just purchased some platforms from Symposium Acoustics. The rumble didn't appear until after getting the platforms. I use one for my MC452 and C2600 as well.
Placing the TT directly on my wood console is fine. Thoughts? |
Hmm ... I used a Symposium Ultra shelf under my VPI Scoutmaster for years without issue. I had a bad rumble issue with my Scoutmaster when using a phono stage without a subsonic filter, at that time I used a svelte shelf which didn't fix rumble.
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I can only assume the Sym shelf is not compatible with your TT and associated gear, why I don't know, I would go back to wood console. Rumble is the pits, I hated seeing the woofers "flying".
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I have never had any problems with rumble under my VPI Classic on top of my Symposium ISO platform (the one with springs). I never tried the VPI on a Svelte shelf. I put all of my other components on Stillpoints and then Svelte shelves and really like the way it sounds. I don't have a audiophile rack though. I would also just leave your VPI on the wood shelf if it sounds better. You can always use the platform under something else.
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- Buck |
3D tone arm
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I ended up reinserting the KAB filter and removed spikes from platform. The platform rests upon isoblocks with a layer of Herbies grungebuster between blocks an platform. All seems Ok for now
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It all depends on the floor you have and then the rack. I have a concrete slab with no basement. No special rack. My Classic 3SE set on 2" maple butcher block with thick sorbothane pads under then the rack. It works for me . Love the table. A forever piece.
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