Vintage HiFi Audio Forum
Repair / Help Forum => Repair / Help => Topic started by: Kingman on February 20, 2019, 12:08:01 PM
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I have the dreaded shakes! :laugh: When I use my sub and turntable at the same time the sub begins to have a heart attack and overload. I switched out turntables with a little success but still not satisfactory. I have been told a lot of things to do...have some sorbothane coming to help isolate TT. Hard to get sub any further away because of limited space. Any ideas or snake oil treatments I can apply?
Shaking in the South
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Can you wall mount your shelf? Physical separation of the table and sub is the only real answer. Taking the dust cover off when you play back can also be beneficial.
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Can you wall mount your shelf? Physical separation of the table and sub is the only real answer. Taking the dust cover off when you play back can also be beneficial.
No, turntable is in worst place on top shelf of stereo rack which is only about a foot from sub... ::)
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a wall shelf would be the best step, but a sandbox might be equally as effective. Have dealt with this problem myself recently and found that the majority of the problem was vibration through the turntable RCAs.
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I have some sorbothane on the way. Hoping this helps.
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Can you wall mount your shelf? Physical separation of the table and sub is the only real answer. Taking the dust cover off when you play back can also be beneficial.
No, turntable is in worst place on top shelf of stereo rack which is only about a foot from sub... ::)
The whole rack acts like the soundboard of a guitar, sending vibrations into the cartridge. If you can't move either device, your only solution is to turn off the sub when playing vinyl.
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Back in the day some pres would have a subsonic filter on them. If you could find a pre or an EQ with one that could possibly help you out some.
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The sorbothane should work IF the resonance is coming through the TT base. In the short term, maybe adding mass under the table can tame it? Or get real nuts and chain it from the ceiling!
If the bass is shaking the arm, I don't know of a solution for that other than turning off the sub or turning it down.
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Chaining from the ceiling is basically the same as wall mounting. I had a friend who did that in his dorm room. It worked great.
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Chaining from the ceiling is basically the same as wall mounting. I had a friend who did that in his dorm room. It worked great.
Unfortunately past the dorm phase 🎶
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Chaining from the ceiling is basically the same as wall mounting. I had a friend who did that in his dorm room. It worked great.
Not if you're a "slinger" >:D
(https://i1.wp.com/whatson.sling.com/wp-content/uploads/2018/09/Couch-Photo_Blog.jpg?fit=800%2C450&ssl=1)
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Back in the day some pres would have a subsonic filter on them. If you could find a pre or an EQ with one that could possibly help you out some.
What about something like this... https://www.ebay.com/itm/1-Harrison-Labs-FMOD-30Hz-Hi-Pass-Subsonic-Filter-Rumble-Reducer-RCA-USA/273442843730?epid=1350975286&hash=item3faa76ac52:g:zZMAAOSwjuFbjx24:rk:6:pf:0 (https://www.ebay.com/itm/1-Harrison-Labs-FMOD-30Hz-Hi-Pass-Subsonic-Filter-Rumble-Reducer-RCA-USA/273442843730?epid=1350975286&hash=item3faa76ac52:g:zZMAAOSwjuFbjx24:rk:6:pf:0)
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Free shipping. Sure, looks like an easy fix.
I am thinking of hanging a shelf on the wall for the turntable, after I decide on the amp/speaker combo once and for all.
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Back in the day some pres would have a subsonic filter on them. If you could find a pre or an EQ with one that could possibly help you out some.
What about something like this... https://www.ebay.com/itm/1-Harrison-Labs-FMOD-30Hz-Hi-Pass-Subsonic-Filter-Rumble-Reducer-RCA-USA/273442843730?epid=1350975286&hash=item3faa76ac52:g:zZMAAOSwjuFbjx24:rk:6:pf:0 (https://www.ebay.com/itm/1-Harrison-Labs-FMOD-30Hz-Hi-Pass-Subsonic-Filter-Rumble-Reducer-RCA-USA/273442843730?epid=1350975286&hash=item3faa76ac52:g:zZMAAOSwjuFbjx24:rk:6:pf:0)
It's worth a shot. In theory it should help.
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Can you wall mount your shelf? Physical separation of the table and sub is the only real answer. Taking the dust cover off when you play back can also be beneficial.
No, turntable is in worst place on top shelf of stereo rack which is only about a foot from sub... ::)
I mounted a shelf above my equipment rack.
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I hope the sorbene works, but from my own investigation, have found that the most effective remedy was to build a sandbox. Sorbene feet can work/ help, but only on tt with a fairly even weight distribution. If the feet are too squished or not squished enough they become ineffective.
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And all the boxes are unpacked? I'm looking forward to hearing some prime Mcintosh gear,
and I'm frequently in your general neighborhood.....
Hint, hint.....
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And all the boxes are unpacked? I'm looking forward to hearing some prime Mcintosh gear,
and I'm frequently in your general neighborhood....
The boxes are mostly unpacked and the gear operational. I have some tweaking to do, especially taming a significant plateau between 31 and 50 hz, but that's part of the fun and preferred over remodelling.
Stop in almost anytime.
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Try choking off !/2 of your bass reflex port to change "mechanics" of the bass----Sorbothane is "dense" & is for heavy shock---Try mattress foam, styrofoam or "beach" sand which is rounded grains (not crushed sand that compacts)---dust cover is a reverberation chamber, & if it's bass radiation---turn your sub a little left or right off center---I've never been able to operate a turntable if a speaker is pointed at it---especially if you're tracking under a gram---& the cover causes reverberation----You really need physical separation---or a radiation shield----like a piece of whatever you got---like piece of plywood---or cookie sheet-L-OLOL
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Try choking off !/2 of your bass reflex port to change "mechanics" of the bass----Sorbothane is "dense" & is for heavy shock---Try mattress foam, styrofoam or "beach" sand which is rounded grains (not crushed sand that compacts)---dust cover is a reverberation chamber, & if it's bass radiation---turn your sub a little left or right off center---I've never been able to operate a turntable if a speaker is pointed at it---especially if you're tracking under a gram---& the cover causes reverberation----You really need physical separation---or a radiation shield----like a piece of whatever you got---like piece of plywood---or cookie sheet-L-OLOL
Thanks for the tips. Things are mostly under control. No separate sub to deal with; the speakers are full range. The turntable is on a wall mounted shelf. I always play it with the cover up (although it doesn't matter when streaming). I have tried the speaker ports open and plugged and use them whichever way is better. I measure the room and use 1/3 octave eq to smooth frequency response.
Through all of my moves I have found it usually takes about three iterations of tweaking to get things where I like them; I have a couple to go (tweak, listen, tweak, listen, etc.) After that, then I leave things alone.
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And all the boxes are unpacked? I'm looking forward to hearing some prime Mcintosh gear,
and I'm frequently in your general neighborhood.....
Hint, hint.....
I have never heard a Mac. This must be addressed.
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Let me know when you'll be in the South Hills (Rt 51 corridor).
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I have never heard a Mac. This must be addressed.
When I get caught looking at McIntosh porn my wife tells me I should google, "how to sell a kidney". The meters do me in every time.
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Let me know when you'll be in the South Hills (Rt 51 corridor).
I was just in the Rt 51 corridor a couple hours ago, but it was for work. I did relieve one of your GWs of some pretty nice vinyl, I'll post a pic in another thread later.