112MBX : Housed in specially designed aluminum cabinets, they are a little over a foot high and wide, weigh only 12 lbs with a 12" speakers. They're also tone monsters.
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Jazz players love them (Charlie Haden and Ron Carter), and even rock bands (Aerosmith) use them for recording. They make ultimate practice and backstage amps and many players find them fully gig-worthy, especially with the 112MBX extension speaker added.