hello, i've checked the archive, and was unable to find anything relevant to my problem, so here goes.... I have a hartke 4000 head, which has no limiter or compression, and i'm have trouble with the e string on both my basses causing the amp to clip. would a limiter or compression pedal help? and what would you recommend? (i'd rather a pedal than rackmount). It's got to be cheaper than trading in a relatively new amp! thanks, phil.