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Rega p3 and Yamaha AS1100

New rega p3 and Yamaha AS100.  Playing moderate volume between 8 to 10 o'clock runs great good quality sound. As soon I set to 11 o'clock volume on my amp, speaker start to produce chopper and vibration sound. Checked the tracking force and balance of the TT and they are ok. Run my amps on my Spotify feed at high volume and it's ok. Checked table vibration and it's ok.  I am stuck and don't know we're to start. Any help out their will be greatly appreciated. 
mario2016
mb1audio02
188 posts
 
If you haven't already, try the MM setting on the back of the amp.
mario2016 OP
5 posts
 
Yes the selector is on MM. how far speakers need to be separated from the TT? Aside from the dust covert rial.  I will try to turn off or unplugged the subs. The subs have automatic on upon signal but running at 0 volume.
mario2016 OP
5 posts
 
As yogiboy mentioned about acaustical feedback . Looks I need to play around the positioning of TT and speakers and the dustcover  I wish I can start doing this now, just I don't want to wake up my neighbors,, lol 

My table was low only 2 feet in height. Speakers  were apart about 7 feet . But the subs was little bit close to the TT 2 feet in distance. As I mentioned subs volume was 0 but was always turned ON as soon signal was sensed from the amps. I used the pre out of the amps to feed the subs in case want more bass on moderate volume.
mario2016 OP
5 posts
 
I reduced the feedback or chopper vibration effect on speakers. I separate the speakers away from TT and amp more than. Put thicker rubber footing in bookshielves speakers Also put power supply of TT on power monster bar. Take off subs from my amp. Running system straight 2 channel.

I still get the feedback pass 1:00 o'clock knob of main amp but this is not my listening level anymore, which is good.  I will try to experiment to put a thick rubber mats under TT.

ThanKS guys for your inputs nd  gave me idea to trouble shoot this.


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