I've heard the Clarifiers at the festivals, and for home use, to replace the useless stuff the big boys try and palm you off with, there fine, but forget about using them for gigging, they just arn't built for it.
Hope this helps.
Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).