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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.
miner42

Showing 4 responses by raymonda

raymonda
855 posts
 
You might be getting airborne feedback as well as mechanical. I, for one, would never place my table behind and so close to a speaker. It is a recipe for disaster. 

Run longer speaker cables and move your source away from your speakers.
raymonda
855 posts
 
I don't know why I assumed he had an integrated..........just run longer interconnects and keep your amp where it is.  

Having your turntable so close to the speaker is just not smart. Also, do not place your table in a corner after you move your system.

This is the best solution to your problem.
raymonda
855 posts
 
Well, as I suggested early on, the best way to minimize your feedback problem was to relocate your table.

Whatever you do, don't put your table in the corner. That too can cause issues.

raymonda
855 posts
 
Often times when you have feedback issues it can be a combination of both mechanical and air born problems. Keep fighting and refining solution to both and I think you will eventually solve your problem.
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