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That's no good... All of the "safe mismatches" listed in the Mark V manual are for cab impedance being higher than the amp output impedance, i.e. 4 ohm tap -> 8 ohm cab or 8 ohm tap -> 16 ohm cabor both at the same time, but it never says it's safe to put a cab(s) with lower impedance than the output. How many speakers are in the 4 ohm cab? You should be able to rewire it in series to make it 16 ohms. Then you can plug the 8 ohm cab into the 4 ohm output and the 16 ohm cab into the 8 ohm output. But don't plug a 2.67 ohm load in.
That's no good... All of the "safe mismatches" listed in the Mark V manual are for cab impedance being higher than the amp output impedance, i.e.
4 ohm tap -> 8 ohm cab or
8 ohm tap -> 16 ohm cab
or both at the same time, but it never says it's safe to put a cab(s) with lower impedance than the output.
How many speakers are in the 4 ohm cab? You should be able to rewire it in series to make it 16 ohms. Then you can plug the 8 ohm cab into the 4 ohm output and the 16 ohm cab into the 8 ohm output.
But don't plug a 2.67 ohm load in.
