I've just bought a second hand Hartke LH1000 amp. I've plugged into my cab(2x15") and it is REALLY quiet and fuzzy. My cab has XLR cable connections and the amp has 1/4" jack. I bought some cables to convert from 1 to the other. The cables seem to get a bit hot too. Do i have to run a special sort or cable or is the amp just not working correctly? Any help would be rad.