Hi
some OFFICIAL 1983 "JBL Service Department" info ; ( I'm assuming the info here was accurate at the time of printing / which was late 1982 )
LE15 : v.c. dcr ( min - max ) 7.6 - 9.2 ohms / "16 OHMS"
LE15a : v.c. dcr ( min - max ) 7.6 - 9.2 ohms / "16 OHMS"
LE15b : v.c. dcr ( min - max ) 3.1 - 3.9 ohms / " 8 OHMS"
LE15H : v.c. dcr ( min - max ) 8.0 - 9.6 ohms / " 8 OHMS" ????
2215 : v.c. dcr ( min - max ) 5.2 - 6.2 ohms / " 8 OHMS"
2215a : v.c. dcr ( min - max ) 5.2 - 6.2 ohms / " 8 OHMS"
2215b : v.c. dcr ( min - max ) 7.6 - 9.2 ohms / "16 OHMS"
2215H : v.c. dcr ( min - max ) 8.0 - 9.6 ohms / " 8 OHMS" ????
2215J : v.c. dcr ( min - max ) 8.0 - 9.6 ohms / " 16 OHMS" ????
2216 : v.c. dcr ( min - max ) 5.1 - 5.9 ohms / " 8 OHMS"