Members notimepro Posted December 4, 2007 Members Share Posted December 4, 2007 Im building a 4x12 cab at the moment with 4 8ohm speakers. i want to be able to run it at 4 ohms or 8 ohms either through a switch or separate jacks. i think i know how to wire the 8ohm circuit (2 sets of 2 each set wired in parallel then wiring the sets together in series. correct me if im wrong) however im not entirly sure how to get it to a 4 ohm circuit. would running a 8ohm resister in parallel on a switch do it? Link to comment Share on other sites More sharing options...
Members Procreatur Posted December 4, 2007 Members Share Posted December 4, 2007 there is no way to do that logically. you can get 2 ohms or 8 ohms out a series parallel setup, or it will be just 8 ohms with two parallel circuits in series. if you were to use a resistor, the amp would split the load between the resistor and the 4 speakers together, creating a pretty large drop in output, let alone the resistor needed would more than likely need a heat sink/vent to allow the heat build up to escape. this is on top of the fact that the speakers aren't 8 ohms at every frequency, and other frequencies would result in a slight mismatch. Link to comment Share on other sites More sharing options...
Members notimepro Posted December 5, 2007 Author Members Share Posted December 5, 2007 I was afraid of that. i wasn't sure if a resister would be able to handle the wattage. i may just make a 4 ohm circuit that only runs 2 of the speakers in a partitioned cab. so i could still use my 4ohm head (i only use it for practice anyway) and a 8ohm circuit for recording and live. Link to comment Share on other sites More sharing options...
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