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I do have another question/issue that this forum might be able to help me understand. That is overhang. from what I understand, overhang is the position of the cartridge as it's mounted on the headshell. How far back or forward it sits in the headshell. How do I determine the best position? Trial and error? Or, is there a better way to choose a starting point?
I'm having the same problem. My buddy was over the other night and suggested I increase the tracking force. I added a gram and the woofer movement decreased substantially, but going from 2.0 grams to 3.0 grams doesn't sit well with me so I put the tracking force back to 2.0 (it's nominal setting). I'll be following this thread with interest, thanks for posting.Todd
First place I'd look for help would be the damn dealer who set it up. A little googling indicates you spent in the vicinity of $10K on this setup. You shouldn't have this kind of problem for this kind of money. And 'proper setup' won't correct incompatibility if that's all or part of the problem. Ask them what the resonant frequency of the tonearm/cart combo is. If it's not optimal range, they should exchange for a more compatible cart. If they don't know, or can't find out quickly, they're not the experts they're cracked up to be, just experts at getting audiophiles to part with $10K. There are resources cited earlier in this thread that should help in confirming or ruling out this problem. It's not even that hard to determine the need (or not) for anti-skating help. I used to set mine to drift outwards very slowly on a blank disk (the groove modulations add skating force not present on a blank platter). It would be wierd for a skating error to dump huge subsonics into a system IMHO.A tonearm/cart combo is like a marriage: they can both be 'good people' but just not compatible. I'm not saying that's what's happening here, but it certainly sounds like at least part of the OP's situation.
I will check the compatibility as advised.
One additional observation is my tonearm is literally bouncing when the excessive woofer movement is happening. I tried a digital source and was able to get clean sound with no odd woofer movement at ridiculously high volume levels so the issue is definatley isolated to my analog chain.
My woofer distortion issue turned out to be a setup issue. My nearest VPI dealer helped me diagnose the problem in his shop. Essentially the in-house setup I paid for was not good and he tweaked the setup significantly:1. The VTA tower and lift were sitting way too low, that was raised about 1/2"2. The azimuth setting based on using a Fozgometer was way off. Azimuth was adjusted back to square.3. VTF was REDUCED to 1.8 gramsProblem solved. The dealer thought the Sumiko was still a little bouncy and probably not a great choice for a uni-pivot so I may end up getting a new cartridge. But for now it is sounding great and I'm leaving well enough alone...Todd
100# table? The VPI isn't 100#??I'm sure the dealer will sell you a new rack setup. Uhuh!Get the rumble filter, KAB, you will never hear it.I pretty sure you will always see some kind of movement on those woofers.
I will keep trying to get this resolved and post results. In summary so far:1. My Sumiko cartridge was setup incorrectly. Fixing that was a good first step.2. I purchased a Symposium Seque ISO platform. That didn't help, but my table did sound better with it so it stayed.3. I replaced the cartridge and that helped, but did not completely fix my issue.
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