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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
mario2016 OP
5 posts
 
@  yogiboy ,Yes I do. I will test this tomorrow. May I ask why dustcover will give acaustical feedback?
yogiboy's avatar
yogiboy
5,486 posts
 
@mario2016 , Feedback can go right up through the dustcover. You can also turn down the bass control on the Yamaha and see if that works!
mario2016 OP
5 posts
 
Thanks. I wil give it a try. I will update you on this.  appreciate your advice
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.
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