popping sound during playing (Solved)

    Hi Guys,


    Second post, fist one was to introduce myself, this one concerns an issue I have with the Kemper and on which I could use some advice from all the smart guys that seem to visit this forum.
    Don't burn me if this issue was already raised by someone else, I did a search, but could only find threats with "popping sound issues" when changing rigs.


    My first question is, when switching the unit off while the studio monitors are still on, I get a pretty loud kind of popping sound, is this normal?In order to avoid it, I always switch the studio monitors of first.


    Secondly, I sometimes also have this more or less same popping sound while playing, happens on both clean(fischers 100) and distorted(Sinmix free jcmKK, Daniel Waldmanns slayer clone tones) profiles. It's really loud and it scares the hell out of me when it happens, it really makes you jump out of your chair, since it happens pretty randomly. It doesn't occur when I chance a profile, just when I'm playing.
    Last night it was so loud, that I lost my signal in the kemper. After the pop occurred and I wanted the continue playing, the unit did not produce any sound anymore. When I switched to the tuner, I noticed there was no signal from the guitar anymore when I strummed the strings?
    When I restarted the unit everything worked again, but still, I want to prevent this from happening again.
    Initially I thought it was caused by the washing machine in the room next door, so I forbid my girlfriend to use it while I played guitar, but this didn't solve the problem. I've also switched guitars, but the problem still occurs, I play blackouts AHB1 on both guitars.
    I would like to find out what causes these loud pops, in order to prevent it from happening since I'm afraid one day my unit will not restart with sound again. Since this is my second Kemper and I already returned one because it didn't produce any sound anymore, it's really freaking me out that I can't seem to find the issue that causes these pops to occur?


    Any help and ideas will be more than welcome!




    Regards,


    Thrasher

    Thanks for the swift reply Damian, I will try a different cable and the alternate input on the backside and report back with my findings.
    I will also try to make a recording of the popping sound that I get when I switch the kemper of while the studio monitors are still on.
    From your reply I can conclude that you don't have any loud popping or strange other sound when switching the kemper of while the monitors or FRFR speakers are still on?

    It has happened during gigs a few times , usually when going from a quieter sound to a louder lead one. May be difficult to record when playing live but it sounds a bit like switching channels on some of my tube amps ( Had it on Triple Rectifier and Cornford MK50 Mk2 when I used to gig them). Changing guitars didnt make a difference with the tube heads but haven't tried with the KPA.

    Quote from Robman

    It has happened during gigs a few times , usually when going from a quieter sound to a louder lead one. May be difficult to record when playing live but it sounds a bit like switching channels on some of my tube amps ( Had it on Triple Rectifier and Cornford MK50 Mk2 when I used to gig them). Changing guitars didnt make a difference with the tube heads but haven't tried with the KPA.

    Thats interesting?? ive never had a pop when changing channels on any amp before. I've had the pop on the KPA when going from the same rig but with different effects on each one

    I have this popping while i am playing too (only with clean sounds). It realy knocks you out! Solved this problem with different settings:
    Try to use another cab sim, sometimes it helps. Or, go down with the clean sense. Or, go down with the cab volume. Or, go down with the rig volume. For me its a reaction of to much input level. Albso when i ise a comp in front (sometimes).
    Or try to use a combination of these tips.

    The popping when switching off is normal. I always turn off active speakers or the power amp first. I'm not sure why they can't implement a mute just before power off as part of the shut down procedure. It's been requested.


    Popping while playing doesn't sound right at all. I've never experienced that. My initial guess would've been some kind of power spike issue, but I'm not sure if that would affect the Kemper the same way that it would a tube amp, and it seems that @Eltzejupp has also experienced it and has a fix.

    Thanks for all the replies and suggestions, I really appreciate it.



    Quote

    There is some Pop when switching on or off (from analog outs) but this is nothing unusual.Good practice in the studio is to turn everything on before you switch your studio monitors , and switch the monitors off before any other equipment.


    Last night I decided to first turn the studio monitors on, and then the kemper. This indeed also creates a popping sound but that's very mild and doesn't sound like it would do any harm to my speakers., The pop I get when I leave the studio monitors on and switch the Kemper of, is signifiatly louder, doesn't sound healthy for my speakers.
    But the popping sound that occurs while playing is the loudest of all.


    Quote

    I have this popping while i am playing too (only with clean sounds). It realy knocks you out! Solved this problem with different settings:Try to use another cab sim, sometimes it helps. Or, go down with the clean sense. Or, go down with the cab volume. Or, go down with the rig volume. For me its a reaction of to much input level. Albso when i ise a comp in front (sometimes).Or try to use a combination of these tips

    .


    Eltzejupp; sounds like we have the same problem....this popping is so loud and unexpected that it makes your spine shiver. Tonight I am going to try the things you suggested. I would be supprised if it had anything to do with Cab/Rig volume, since these are on modest settings and my master volume is always below 0.3, but I will try it anyway.
    I hope you are right and it's a matter of to much input level, my clean sense is at default and since I use blackouts they might be a little too hot.
    I never messed with the clean sense after read it only was to balance to volume between the clean and high gain rigs, but I will turn it down and see if it helps.


    Quote

    Popping while playing doesn't sound right at all. I've never experienced that. My initial guess would've been some kind of power spike issue, but I'm not sure if that would affect the Kemper the same way that it would a tube amp, and it seems that @Eltzejupp has also experienced it and has a fix.


    Those were my innitial thoughts to, but I never had these loud popping sounds when I played my analog gear in the excact same room?

    Edited 4 times, last by Trasher ().

    Last night I turned on the unit in order to try the suggestions that were made to solve this popping sound issue.
    Guess what, no sound......aaaargh!


    I turned the unit off, waited for 15 min and turned it on again, still nothing, I did notice that the tuner received a signal.
    Everything looked normal, the lights were on (but nobodies home ;-)), I could change settings, change rigs, add eq, stomp boxes etc, but no sound.
    Tried the alternative input on the back and changed guitar cables & switched guitars, but still nothing.


    At this point I started to get visions of myself in the attic looking for my UX2.


    After repeating this process of turning the unit on & off 4 times, It started producing sound again.
    The sound however wasn't as good as usual and also seemed lower in volume, I always have my master volume on 0.1 and rig volume on 50%, amp & cabinet volume both on 0. With these settings the unit did not produce any sound, I had to increase the master volume to 0.4 in order to got some sound out of it, all other settings stayed the same. With the master volume set on 0.4 it still had a lower volume than it had before on 0.1?
    I decided to repeat the process of turning the unit off and on again, but after doing this 3 times, sound quality nor volume improved.


    I decided to do a factory reset, after doing this, the sound quality & volume was back to normal level.
    I lowered the clean sense to minus 5, checked the cab & amp volume which both were on zero and played my Angel of Death/Reign in blood/Dead skin mask medley for a couple of minutes to check if I would have these loud pops again and to get rid of some build up frustration/aggression...
    I didn't have any loud pops, but I only played for about 10 minutes since it was already late & I had to get up early to go to work the next day.
    So it might be a bit early to say the problem is solved, after the weekend I will report back again.

    Back already, unfortunately.


    Just fired up the kemper, reached over to grab my guitar, while doing that the unit already made the loud popping sound again. Please note that at this point my guitar wasn't even connected to the kemper.


    I'm no expert, but I guess this pretty much rules out the possibility that it has anything to do with my guitar whatsoever?
    Nevertheless I connected my guitar to the unit, but it doesn't produces any sound anymore. Checked the tuner, and there's no signal from my guitar when strumming the strings.


    Does anyone have a solution for this problem, or should I return the unit


    Since this is the second time I had this issue with a kemper, I feel a bit uncomfortable to send it back again. They already send me the current kemper I have as a replacement for my previous kemper with which I had the same issue, amongst other issues. Please don't get me wrong, I'm not saying this has anything to do with the unit!


    At this point I'm almost starting to think it might have something to do with myself, but I can;t think of anything that I do that would do harm to the unit?
    I never connected it to a power amp, nor to the loop of an amp, so no chance I might have accidentally screwed up something there? I'm also not the type of guy who starts to flip switches and pushing buttons all over the place on an unit, been there, done that, learnt the lesson the hard way ;)

    Quote

    Eltzejupp5 minutes ago


    At the end i think its not normal. Open a service ticket and make backup file. Maybe the guys from kpa can analyse it with the backup file.


    Thanks for the advice, would that mean opening a thread in "Profiler related issues and trouble shooting help"?


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