I just purchased an Ampeg B-15S. I literally wheeled it down the street from the dudes rehearsal space. -Black tolex/Silvery white Grill cloth -Larger(and heavier) than typical B-15s -says 60 Watts but it's crazy loud -Low profile tube cage (same height as transformers - all black) -VERY (crazy) good shape except grill needs restapled on one end -original Dolly -Both channels have B,T,V -Channel one has a three way Response switch knob BASS, FLAT, and GUITAR -4 inputs - two bright and two normal -It's got three old style metal toggles -Standby, Polarity, and Power -Mine has Grey paint on the faceplate (not black -The graphics are black/square with no dividers and the logo is metal so I think it's a 72 The bad - stamp frame speaker was replaced with a cast frame - PAS (professional Audio Systems - looks like a relabled EV or something. Sounds incredible the way it is but I could use some suggestions about suitable replacements. I'd like to try an original stamp frame before deciding anything, The amp sticker says service is in Linden NJ. Was this amp made there or did service remain in Linden NJ after Ampeg moved.