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I have two minidsp2x4HD which i tried to use with a calibrator for my HT before . He said he couldnt figure out why but he got a loud noise when he sent a subwoofer sweep to to them so we decided to ignore it and use Dirac . Recently when i decided tp calibrate my 2  channel i could not have a signal pass through the analog connection . I tried to output my sub using only my preamp rca out and it worked ( so both my subs and preamp rca connections work ) i used my computer and the usb input on the minidsp and it worked . So my conclusion is that the analog input on both of my minidsp not working ( possibly damaged ) anyone has ever had this problem . Can they be repaired ?

If you connect your miniDSPs to the plugin, select the analogue input and connect up a source generating an input signal, do the input signal bars in the plugin show anything or not? Note you don't need anything connected to the outputs to test this.

Hi . I followed your advise and connectrd the analog in and put a music through it and bot the imput and output was showing a signal flowing through . Then i connectrd the minidsp to my other 2channel gear and it was nothing first but then i increased the volume on the amp and sound startrd to flow out from the speakers . The volume knob  was at twice my normal listening and i had a huge distortion . The minidsp mastrr volume was set at 0 db . The in put and output gain was 0db and the signal on the schannel meters read around -20'range . So i assume it has to do something the master volume was set before loading the correction file on it ( maybe i should have lowered it significantly like -40 ? ) 

What sort of signal levels are you seeing on the input and output bars?

With music playing through them i typically see - 30 to - 20 dbs on average with gain at 0 db and master valume lso at 0 db 

juszat65 wrote:

With music playing through them i typically see - 30 to - 20 dbs on average with gain at 0 db and master valume lso at 0 db 

Is this on the input bars, the output bars, or both?

These levels are on  both the input and output bars . So it seems that the minidsp 2x4 working ok except the signif distortion i heard from the speakers . My current thinking is that when i connect the minidsp into my 2 channel system before calibration and measurment with REW i would lower the main valume setting in the minidsp from 0 to something like -20 or more and when i run the stereo system after calibration and correction i would raise the minidsp main volume back to 0 db and control the overall volume with the preamp . 
 

juszat65 wrote:

These levels are on  both the input and output bars . So it seems that the minidsp 2x4 working ok except the signif distortion i heard from the speakers . My current thinking is that when i connect the minidsp into my 2 channel system before calibration and measurment with REW i would lower the main valume setting in the minidsp from 0 to something like -20 or more and when i run the stereo system after calibration and correction i would raise the minidsp main volume back to 0 db and control the overall volume with the preamp . 


 

Do you have any PEQ filters defined and do you get audible distortion with Dirac turned off?

What source are you currently using and do you have a line-level source like a CD player you could try and see what the input levels look like? With a modern pop CD they should be getting close to 0dBFS. No need to have the output connected to anything to test this.

So the above input output readings wefe observed with the REW peq filters loaded . Dirac is not engaged . At this point i think i will start everything over and trying to se if i can set different parameters in the minidsp to get better result . It seems now that the input,  output work ok . However now i hear a lot of distortion . 

juszat65 wrote:

So the above input output readings wefe observed with the REW peq filters loaded . Dirac is not engaged . At this point i think i will start everything over and trying to se if i can set different parameters in the minidsp to get better result . It seems now that the input,  output work ok . However now i hear a lot of distortion . 

I'm asking questions to try to diagnose whether you have a hardware fault or not, rather than you potentially wasting time just trying again.

If you clear the PEQ, or use an input with none set, do you still get distortion?

My suggestion to use a line-level source like a CD player was to try to confirm whether the analogue input is working as it should or not, at least in terms of the signal level.

I appreciate your help . I am going to try what you suggested and let you know what happens .