JBL K145 15" speaker with its original factory cone. The surround is in excellent condition, as well as the entire cone/dome/spider/voicecoil assembly. This speaker came out of a Sunn 1x15 can, and was working great when removed. Works 100%.

K145 Bass Instrument Loudspeaker- A Success Story. The objective: To create brand new sound in a 15 inch bass instrument loudspeaker - sharply defined, crisp sound that projects a bigger bass punch than ever heard before from other loudspeakers its size. Plus the same high eficiency and power handling that have made JBL the overwhelming choice of ptofessionals for more than 30 years. The K145’s special cone is powered by the most massive magnetic strnctute JBL has every built. 20 pounds worth, and in the JBL tradition, all critical areas are precisely machined far optimum performance. It contains a large, costly Alnico V magnet (250% sttonger per pound than conventionally used ceramic types) that directs tremendous energy fo the magnetic gap through a huge cast iron pot ~structure.

Within the magnetic gap lies a 4 inch diameter voice coil of copper wire, milled to a fine ribbon then tightly wound by hand on its narrow edge. Compared to small, machine made coils of round wire which ate typically used in other speakers, this process increases efficiency, expands dynamic range and provides outstanding definition ~ the kind of extra performance a musician expects from JBL.