thanks,friends-I have a potted mule and I really cant tell much of a difference-both smoke..I havent had a chance to a/b yet...as soon as I can , I will report-I have Boogie Mk II amps ..lots of gain...and I have had no squealing issues, of course I do not use a ton of gain-I plan on giving it a good test drive later..will see if I can get her to squeal like a pig!!