Hmm so I bought a MkIV about a month back...sounds great... been experimenting with my Zoom G7 in the loop. Have it set to +10db which is rack gear level. Everything sounds fine except last 2 weeks when I switch the loop on I am getting this howling feedback that builds up in R1 mostly but also R2 and Lead channels to some extent. If I palm mute the strings or turn the guitar volume down it doesnt stop until I switch the loop off.
Does this mean my preamp tubes are shot ?
Also one of the eq slider nobs is missing is there anywhere someone can point me to to get replacements ?
Thanks
Does this mean my preamp tubes are shot ?
Also one of the eq slider nobs is missing is there anywhere someone can point me to to get replacements ?
Thanks