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Turntable and subwoofer living together in peace and happiness

Unfortunately I got readdicted to audiophile disease a few years ago. I amassed a new system via the used market: Rotel Rb991, NAD c658, Rega Planar 3 w/motor upgrade, tonearm rewire, upgraded arm counter balance, Hana ML, Clear Audio Basic+, B&W 805 Matrix, B&W ASW800 subwoofer, Kimbers all around.

My issue has been subwoofer integration. I get rumblely feedback from the subwoofer as soon as I drop the needle into the lead in groove. With digital playback this is not an issue. Thinking that the turntable was picking up vibration from the floor and cabinet, I built an isolation platform that consists of a 6 inch deep box made of Peruvian Walnut filled with 50lbs of sand and topped with a 1/2 inch granite all of which sitds on Sorbothane spiked feet. I thought i had the subwoofer was far enough away. 

Any and all thoughts would be appreciated. 

horn13
ozzy62's avatar
ozzy62
3,683 posts
 

The first thing to start with is location. Although locating turntables is corners is a no-no, you can even have issues with the table being in proximity to the corner.

I had an issue some time ago with a VPI Aries when I had stereo corner loaded subs. The table was located off center on the rack, closer to the right corner and I was getting terrible feedback but only with high playback levels of bass heavy material. Moving the table six inches away from the corner and closer to the mid-point along the front wall completely solved the problem. 

So pay attention to where your table is situated. If it is closer to one corner, just try moving it a little more center. Costs you nothing.

 

artemus_5's avatar
artemus_5
2,016 posts
 

Pull the subwoofer away from the wall as much as possible. I suspect the back pressure from the sub is riding directly down the wall to your Turntable.FWIW I have had the same issue. My sub was closer. Moving the sub further from the TT and the wall was effective. Also consider isolation footers, IE Herbies Audio or the sub dude mentioned earlier

limomangus's avatar
limomangus
2,000 posts
 

Definitely the subs location is the biggest issue. 

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