Hey, I was under the impression that the ohms rating of a head and cab have to match to be compatible. So how can this head with 4 ohm outputs drive its 8 ohm cab (see the link)? I know nothing about these things, but I'm looking into buying a head and cab for cheap and I need to know how to match them up. Thanks.

http://cgi.ebay.com/ws/eBayISAPI.dl...me=STRK:MEWA:IT

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dont buy that thing.

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Why not? Chuck used that model, man.

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http://guitargeek.com/chat/showthre...&threadid=46544

The importance of that to you is that it states that it is ok to run an amp at lower impedance then the cab is rated at, by one step (a step being 4-8 or 8-16). However it states that it is bad to run an amp at a higher impedence then a cab is rated. so powering a 4 ohm cab with the impedence switch at 8 is a no no.

Looks like a good sell to me. The great law of Ohm's states that current ( which is related to power or Watts ) is proportional to the applied voltage and inversely proportional to the calculated resistance. This means nothing to many people so I will make it simple.

As long a you don't go under the Ohm level allowed for a amp then you will not burn the power supply transformer, tubes, diodes, capasitors, or fuses. It isn't a great ideal to uses a cab that isn't closely matched to a amp's Ohm output for reasons to many for me to talk about at the moment, but that Cab could be easily modified to make it 4 Ohms. One way is to add another 8 Ohm in series to it either by daisy chaining another cab or by simple connecting the cab load to the amps other output.

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Thanks for the responses. I bet that's why Marshall sold an 8 ohm cab with a 4 ohm head: so you could buy another of the same cab and hook it into the second speaker jack.

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Precisely why they did it

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