After rarely paying attention to them anymore, at least for the last 2 decades, I've dipped my toe again into listening to vinyl phonograph records, at least for the moment. My playback systems are very wide range equalized for flat bass output to the lowest audible frequencies and then some. My best turntable is Empire 698 which has fairly good isolation, its motor, arm, and main bearing mounted on a casting suspended from the main plinth by springs. But it's not enough. Without a bass cut there's acoustic feedback at anything more than very low gain settings. So what's the best strategy for making a platform to isolate vibrations from it? A pillar of concrete blocks? Thick rubber mats? A sandwich of both? Looking for simple practical answers, not expensive audiophile gimmicks that work for some turntables but not others. This one is fairly heavy. If you have a system that has very deep undistorted bass, do you experience this problem and how do you deal with it?
Hi,
You need a electronic rumble filter set around 20Hz, no way round it practically.
Hardly any records have any bass anywhere near 20Hz or below, groove width.
All good RIAA preamps should have one, but sometimes they are omitted.
rgds, sreten.
You need a electronic rumble filter set around 20Hz, no way round it practically.
Hardly any records have any bass anywhere near 20Hz or below, groove width.
All good RIAA preamps should have one, but sometimes they are omitted.
rgds, sreten.
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Just for kicks & grins, try reversing the leads on both your speakers, to see whether changing the phase might help.
Apart from any other suggestions which may also help, a thick piece of foam under the turntable works wonders 🙂 in my experience with high powered sound systems anyway. Try it, it's cheap too 😉
I've heard that a paving slab supported on tennis balls works well. Or, in a pinch, wrap a bunch of rubber bands over rolls of duct or gaffer tape and suspend each foot separately. Enclosing the turntable in a cabinet should reduce feedback through the air, if that's a factor.
Moving the turntable to avoid room nodes ought to help.
It would be instructive to hook up a sound card or recording device that has level meters and compare the output from a needle sitting on a stopped record (with music playing from a CD), with the normal output level of record playback.
Moving the turntable to avoid room nodes ought to help.
It would be instructive to hook up a sound card or recording device that has level meters and compare the output from a needle sitting on a stopped record (with music playing from a CD), with the normal output level of record playback.
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