Feedback through turntable

My system consists of a McIntosh C2300 preamp, MC452 amp, MCD500 SACD player, VPI Aries 3D with Ortofon Cadenza MC cartridge, Manley ChinookSE phono stage, PS Audio P5, Sonus faber Cremona Auditor M speakers and REL B1 Sub bass system. My issue is with turntable use only; SACD has no issues. On my pre when volume is +55 (peak at 45watts) I start to get feedback through the turntable - a sort of low freq sound, back off volume and it goes away. My Auditor M speaker is about 3 ft away and in front of turntable. I do have a rumble filter (KAB) installed between preamp and phonostage to help with sub woofer pumping. Due to room layout I cannot rearrange the setup/move turntable. My turntable is on a 2.5" block of wood and that sits on 4 isolation blocks via spiked feet. Any thoughts how I can eliminate this problem? Harry Weisfeld with VPI states he has 4 15" woofers (JBL Everest) near his Prime Signature setup with no issues at all. Why am I having this problem and how can I eliminate it? Thank you in advance for all feedback.

miner4202-21-2017 1:41pm

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dlcockrum Details Discussions Posts This discussion Message User 2,190 posts 02-27-2017 at 12:14am Copy Comment URL Report Comment Edit Delete "in my 30 + decades in audio". Slaw, you are the audio Rock of Ages. What was your system like before the discovery of electricity? ;>) Kidding! Dave
almarg Details Discussions Posts This discussion Message User 9,670 posts 02-27-2017 at 01:22am Copy Comment URL Report Comment Edit Delete Totem395 2-21-2017 Does the the issue arise even when not using the sub? Miner42, I don't think this question has been answered. Also, where is the sub located relative to the turntable and relative to nearby walls, and what is its rolloff frequency set to? Regards, -- Al
bdp24 Details Discussions Posts This discussion Message User 9,514 posts 02-27-2017 at 02:13am Copy Comment URL Report Comment Edit Delete Good stuff Slaw. I want to get rid of the last of the rubber in my system, the inner tubes in the original Seismic platforms. I have been planning on getting some of Geoffs springs, and perhaps some of the current Townshend Seismic Pods. I find the Pods more than a little overpriced, but what else is new?! I too had a VPI HW-19, and considered it about as good as a suspended-subchassis design could go. But you're right---that MDF platform was it's weakness. I never heard the later acrylic version, having moved on to the Townshend Rock table, which certainly doesn't have THAT problem!
slaw Details Discussions Posts This discussion Message User 20,546 posts 03-03-2017 at 07:31pm Copy Comment URL Report Comment Edit Delete dlcockrum, Thanks for the laugh! ( of coarse I meant (3) decades). I'm glad all of you are willing to put up with me, most of the time. Happy listening.
toddverrone Details Discussions Posts This discussion Message User 840 posts 03-03-2017 at 08:42pm Copy Comment URL Report Comment Edit Delete @slaw would you recommend springs instead? I'm not willing to drop a lot of coin, so switching to springs seems like something I'd be willing to try. Any recommendations?