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  #11  
Old 06-09-2022, 01:12 PM
Famester V1 Famester V1 is offline
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I use the factory mat on my VPI. I never knew could run it without. I will have to try it. Thanks
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  #12  
Old 06-09-2022, 04:53 PM
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No mat on the Clearaudio, FWIW and I'm no expert, I've been told by the technician who helped me setting it up that there is no need to use a mat as the platter is made of a high density material (Polyoxymethylene, POM) that doesn't generate any vibrations, and the chassis is supposed to be designed in a way to keep resonances out of the audible range

But I still have somewhere a Ringmat as well as cork mart (which I got from Disk Union in Tokyo during my last trip to Japan), I'll give those a try to see if they can improve the sound in any way
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  #13  
Old 06-09-2022, 05:57 PM
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Replaced the fuzzy stock mat on my Rega P6 with the Achromat and never looked back.
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  #14  
Old 06-09-2022, 06:52 PM
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When I had a VPI (Scoutmaster) I didn't use a mat - I tried several but found the clamp with no mat sounded best. With Regas (P9, RP10 and current P10) I experimented with a variety of mats and ended up with the Auditorium.
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  #15  
Old 06-10-2022, 10:06 AM
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The Achromat's claim is that the cartridge/needle contact with the vinyl has it's own resonance or vibrations that can be reflected back from the bottom of the vinyl and color the sound. Their foam cell mat absorbs these vibrations and converts them into heat energy.
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Old 06-10-2022, 01:11 PM
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Quote:
Originally Posted by bohemian View Post
The Achromat's claim is that the cartridge/needle contact with the vinyl has it's own resonance or vibrations that can be reflected back from the bottom of the vinyl and color the sound. Their foam cell mat absorbs these vibrations and converts them into heat energy.
Interesting explanation, thanks. It would be interesting to understand if this is true whatever material is used for the platter or if some materials will damped that bottom of the vinyl reflection/coloration more than others?
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  #17  
Old 06-10-2022, 04:04 PM
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Quote:
Originally Posted by joel_hifi View Post
Interesting explanation, thanks. It would be interesting to understand if this is true whatever material is used for the platter or if some materials will damped that bottom of the vinyl reflection/coloration more than others?

My understanding is that an acrylic platter, especially a high-mass one, will tend to mate well with a vinyl record and damp vibrations, especially if a clamp or weight is used. It will also be less subject to external vibration. My experience is that, with a high-mass acrylic platter, coupling the vinyl directly to the platter is very effective.

On the other hand, a lighter metallic platter will have a greater tendency to ring and transmit external vibration to the vinyl, may also reflect vibration from the vinyl/stylus back to the stylus, and therefore may benefit more from a good mat that can provide some damping effect. There are a variety of materials that work well in this case, including rubber, felt, cork, paper, carbon fiber, and various combinations. Also there will be a greater tendency for slippage between the record and platter with metal and other very hard surfaces (e.g. Rega ceramic platters). The one truism for me is that felt sucks[emoji41] - after that, I don't think there's any one simple answer or best mat, it can depend on the mat material and construction, the table and platter, and your taste.
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  #18  
Old 06-10-2022, 05:23 PM
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Quote:
Originally Posted by Antonmb View Post
My understanding is that an acrylic platter, especially a high-mass one, will tend to mate well with a vinyl record and damp vibrations, especially if a clamp or weight is used. It will also be less subject to external vibration. My experience is that, with a high-mass acrylic platter, coupling the vinyl directly to the platter is very effective.

On the other hand, a lighter metallic platter will have a greater tendency to ring and transmit external vibration to the vinyl, may also reflect vibration from the vinyl/stylus back to the stylus, and therefore may benefit more from a good mat that can provide some damping effect. There are a variety of materials that work well in this case, including rubber, felt, cork, paper, carbon fiber, and various combinations. Also there will be a greater tendency for slippage between the record and platter with metal and other very hard surfaces (e.g. Rega ceramic platters). The one truism for me is that felt sucks[emoji41] - after that, I don't think there's any one simple answer or best mat, it can depend on the mat material and construction, the table and platter, and your taste.
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  #19  
Old 06-10-2022, 07:42 PM
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I use what it came from the factory with, a thick rubber mat. Looking for a MM cartridge for my Kenwood.
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  #20  
Old 06-11-2022, 11:08 AM
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Quote:
Originally Posted by njcardave View Post
I use what it came from the factory with, a thick rubber mat. Looking for a MM cartridge for my Kenwood.
I also used the rubber mat that came with my SL-1210 Mk5. The Achromat has made an improvement that is noticeable.

To be clear and to follow-up a bit further, the structure of the mat somehow encapsulates something like a gazillion of the tiniest air bubbles. This is what absorbs energy and turns it to heat, which from your physics class, you might remember is the graveyard of energy.
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