This is a custom made 3-10 speaker cabinet.  It is loaded with 3-10 inch USA Eminence speakers.  I know the two bottom speakers work.  The top speaker is a slightly different model and for some forgotten reason, I have never had it hooked up.  It may not work or does not match impedence of the others (or both).  Not an exact match, but was built to work well with a vintage Fender Band Master tube amp head.  It also matches the 1-15 cab I have for sale.  Measures about 26 x 22 x 10 inches.  The last picture might help give it some scale. 

I'm cleaning out the basement.  I have a half dozen loaded speaker cabinets for sale (really cheap) if you need a guitar cab, pa monitor or bass cab.  Look at my other listings.  I would also consider trading speakers for guitar related items... working or not.  If you have an old guitar or tube amp, I would be interested in it.