if you take your time and do a good job of shielding i.e. no ground loops you don't even need a string ground.but be warned if not done right this could be dangerous but if your amp is properly grounded and you do your homework you will really like this set-up.you can actually get more gain out of your amp and it sounds great with no ground hum. check out guitarnuts web site.or check out "shielding the beast" on google
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