Note that the M2200 carries an "official" rating at 4 ohms of 300 watts. This means that under FTC regs it was tested at the full 300 watt level into 4 ohms for a continuous period of at least five minutes, a severe lab test that would never be duplicated in home use. There's no problem with the design of the M2200 and if used correctly, again, it can easily power M80s to beyond safe levels.

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Enjoy the music, not the equipment.