THESE ARE CONSTRUCTION PLANS NOT THE SPEAKERS This auction is for a copy of an original set of JBL plans to build a JBL 4560 bass bin. The plans are nine (9) pages (8 by 11) with a parts "cut" list and are in a report cover for protection. This is still one of JBL's finest loudspeaker boxes ever created. This is a directional horn for a single 15 inch driver (JBL 2220 Pro recomended). This horn and vented rear reflex chamber give a usable response to 50Hz with maximum loading above 200Hz. Dispersion is 90 by 60 at 800Hz and will add 6db to the on-axis sensitivity of the loudspeaker. Dimensions of the cabinet are: 36"1/4H by 30"1/4W by 23"3/4D. FREE SHIPPING TO USA AND CANADA (international buyers flat rate shipping) |