From craigslist:

“Hartke Pro Series 2200 bass cabinet with two 12″ speakers in an upright configuration with a horn. This is a very nice little cabinet, light weight, on the smallish size (it’s about the same proportion as R2D2) and is in excellent condition…”

Oh, yeah, I remember those proportions from when I was standing next to R2D2 at the last Star Wars Nerd Con I went to. I was immediately tempted to consult my own replica of the famous droid (I keep it in the den), until I remembered that it is NOT an accurate replica of R2D2, but in fact, slightly smaller.