Appearance:Scratches on top and back. ALNICO. 4way 4speaker. 8 ohm. 93dB. 38cm cone(2231A), Mid-low:25cm cone(2121A). Mid-High:Horn.(2308+2307+2420). High:Horn.(2405). Crossover:300/1,250/9,500Hz. Introduced in 1978. Maintenance completed in Mar.2009.