![]() The Crate cab was set on 4 ohm mono mode. Well here is how I had it set up, which was obviously wrong: I had the crate cab plugged into the 4 ohm jack. You can also plug an 8 ohm cab into each of the inputs so the load is 4 ohms total. The Marshall head has two speaker outputs, one for using just one 4 ohm cab (the minimum impedence the head handles) and another for an 8 ohm cab. Bummer! 12 days until my band tours the country and my head dies. ![]() Here's what happened: after about 5 minutes the head shut off and smoke came out like crazy. I just got the Carvin cab, which is 8 ohms only, and I have never tried using the Marshall head with both heads until today. The Crate has options to do 16 ohm mono, 8 ohm stereo, or 4 ohm mono and it has an output to go to another cab. I have a Crate BV412SV cabinet, and a Carvin cab. ![]() I know that if you combine say two 8 ohm cabs the load becomes 4 ohms and whatnot.but here is my situation: I am quite confused about speaker/head impedence issues.
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