powersoft m50q dsp Problems

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   I bought a secondhand powersoft m50q dsp and it worked great on the first two gigs.  It has developed a problem where channel 1 made a crackling noise even with the pots turned down and the inputs unplugged.  Power cycling the amp seemed to help, then chan 1 started making the crackling noise after about a minute.  I have chan 1 and 2 mixed via software.  If I use chan 2 pot the amp passed audio fine.  If I used the chan 1 pot it cracked and distorted the audio.  When I raised the the gain going to the amp the noise stopped at a certain level and the amp functioned normally even when pot 1 was turned back down.
Any ideas?  Should I clean the connectors on the dsp cards, clean the pots?

TIA

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logsquared1 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 09 February 2017 Location: USA Status: Offline Points: 115	Post Options Post Reply Quote logsquared1 Report Post Thanks(0) Quote Reply Topic: powersoft m50q dsp Problems Posted: 26 October 2017 at 7:28pm
	I bought a secondhand powersoft m50q dsp and it worked great on the first two gigs. It has developed a problem where channel 1 made a crackling noise even with the pots turned down and the inputs unplugged. Power cycling the amp seemed to help, then chan 1 started making the crackling noise after about a minute. I have chan 1 and 2 mixed via software. If I use chan 2 pot the amp passed audio fine. If I used the chan 1 pot it cracked and distorted the audio. When I raised the the gain going to the amp the noise stopped at a certain level and the amp functioned normally even when pot 1 was turned back down. Any ideas? Should I clean the connectors on the dsp cards, clean the pots? TIA

THECANDLEMAN Members Profile Send Private Message Find Members Posts Add to Buddy List Young Croc Joined: 08 December 2008 Location: CentralScotland Status: Offline Points: 1144	Post Options Post Reply Quote THECANDLEMAN Report Post Thanks(0) Quote Reply Posted: 27 October 2017 at 8:31am
	I know this might be a bit low level but have you given it a shot with a dif cable and not using any patch panel etc in the way. Iv had this before with a split speaker cable on the same model amp
	Motion Systems - Void Airmotion, Airten & Stasys 218 With Powersoft DSP

logsquared1 Members Profile Send Private Message Find Members Posts Add to Buddy List Registered User Joined: 09 February 2017 Location: USA Status: Offline Points: 115	Post Options Post Reply Quote logsquared1 Report Post Thanks(0) Quote Reply Posted: 27 October 2017 at 3:03pm
	Turns out the inside was completely full of dust. Really fine dust. Must have been enough dirt in there to cause the issues. After cleaning it seems fine.