Thump Thump sounds from my TT

[Embryos]

This subject has come up a number of times in the past and every table I'v had be it direct drive, belt drive, suspended, non suspended, low-fi/mid-fi/high end was installed on commercial wall shelves, heavy steel audio racks on a concrete floor if you touch/tap the top of the plinth I would hear a sound/thump transmitted to the speakers. If your listening to a record and you don't want to hear any thumps don't touch your table. As Dr Tinear mentioned your table has to be situated on a solid/steady/level foundation, this being a wall shelf or heavy audio equipment stand.

great... i can certainly live without touchin the table...my table was on a pretty heavy credenza (hollow on the inside obviously) next to my receiver... but check this out: my wife and i moved our living room around yesterday, and the turntable ended up on a different wooden shelving, that is also heavy and solid. the receiver is now directly underneath the TT, of course being seperated by about a 2" peice of wood. low and behold, the tapping/thumping seems to be about 65% less evident with the new setup! the system is also on the opposite side of my living room now, away from my foyer, not sure if that also has anything to do with it... but my stockier, lower shelving seems to have made alot of difference. im pretty satisfied, ha!

 

[Embryos]

How is your room setup? Where is the TT in relation to the speakers? As others have stated, the TT needs to be on a solid base, not on top of other components.

i never really considered that very much. the TT was next to my receiver on top of a credenza, with both speakers only being about 10" away from either side of the credenza. i moved the system around yesterday, the TT and receiver are now on a lower shelf unit, with thicker walls, speakers are now far from the setup (about 7'). thumping is way less evident now, even when i give the plinth an ol tap tappy. who wouldve known? i mean maybe lots of people but not me obviously......i do now!

 

[Embryos]

Many of the problems like this one as Botrytis mentioned are due to poor system set up with haphazard placement of the components. Money spent has little to do with it, a well set up $200 system can sound superior to a poorly setup $20,000 system. Speaker placement along with component placement can make or break the sound quality. In the end if you do some research and be creative money is a very small factor, simply reading and following the advice of the owners manual that came with all your equipment will go a long way to giving you rewarding sound quality.

yes reading manuals is not something i have done. buying used componants is not an excuse i know, considering everything is available online. you may have read in some of my other responses today, that i moved my setup, and now the thump is way less evident.... its funny how easy it is to dismiss the most obvious factors sometimes, such as "reading instruction manuals". haha, ive been relying on aidio karma forums for all my info..which no doubt has helped me ALOT, but common sense is priceless... im working on it.
thanks!

 

[Fishead]

I did check the ground, disconnected and reconnected, to no avail. What was the problem you found with yours?

Embryos, sorry for the delay....too much on my plate, er, platter may be more appropriate!

I found the problem to be largely one of a ground issue. Took the TD160 apart and completely re-did the wiring with the help of the very fine Thorens website I found on another thread here which took care of it. I was still getting slight resonance at very high volumes so I activated the subsonic filter, which resolved that as well. After reading about your experience, I found myself wondering if your subsonic filter is actually working properly?

Further, and as I believe you are finding, placement of turntable in relation to speakers as well as the type of stand (mount) it is on can make huge differences, both positive and negative. I have gone to wall mounts, which I made from some supplies sourced at Lowes for not much $$$ and am finding very effective. Even so, in my case, and with my system components, I could still do better if I had more room to move my turntable farther from my speakers but it ain't gonna happen. So, did the best I could and have found that I can turn it up pretty high without getting any unwanted resonances.....that is, WITH the subsonic filter engaged. Hope that helps and good listening to you!

 

[bobins08]

Sounds like it could be set up. Make sure the TT is level in all directions, that it is on a solid surface free from speaker and floor vibrations, and that all four feet are good. I always set my TT on vibration isolation devices like hockey pucks, vibrapods, etc.

I assume you have a stock mat and it is in good shape, not dried out?

If you thump hard enough you will hear something but the Technics should handle light taps without a problem.

 

[majick47]

A basic turntable tool is a level and not one of those small 2" round bubble ones, go to hardware store or big box get a 8" level, they are cheap maybe $5, to check that your table is level, adjust the feet to level. Also if you have bookshelf speakers on suspended wood floors they will resonate right up thru the credenza to the turntable, put the speakers on stands out from the walls and away from the room corners. Also ensure that their is good separation and ventilation for the turntable and receiver, too close the receiver can cause electrical interference with the table from the receiver transformer.