| That head has two power amps in it. Do both (A & B) outputs do this? If it's only one that does it, that would point to a problem with that power amp. If they both do it, that makes it common to both sides, and there's no way the power amps failed the same way at the same time, so it has to be something else in the mixing section and/or mixing-output-to-power-amps section.
Either way, send it back on the warranty. Mackie's earlier versions of this, the 808S/808M, were rock solid and became a powered mixer industry standard of sorts. Based on this, I'm thinking it's quality gear and you got a bad one. |