| GK 400RB-IV... Are there 2 versions ???
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Was looking into picking up one of these used. I've noticed that on some of these the fan opening is larger than others. Are there 2 versions of the RB-IV? Is there any other differences between the amps besides the larger fan opening?
Last edited by bluesrx : 08-03-2010 at 07:18 PM.
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