Altec Lansing HF DRIVER CROSS REFERENCE MASTER LIST Reference

LARGE FORMAT HF COMPRESSION DRIVERS

Early 288 and 291 series high frequency drivers used Alnico motors, most with a
circumferential phase plug. Later 288, 291, and 299 series drivers used ceramic
motors with Tangerine® phase plugs. All use 2.8" voice-coils and the diaphragm
assemblies interchange. (The 290 series diaphragm will not interchange)
Three types of diaphragm assemblies have been manufactured. You can verify
which diaphragm you have by inspection. The "Symbiotik" diaphragm has a
Kapton (plastic) surround with an aluminum dome (500Hz - 12kHz). The
aluminum and "Pascalite" diaphragms (500Hz - 16kHz) are all aluminum or
aluminum alloy. The "Pascalite" diaphragm has the sonic quality of the aluminum
diaphragm and handles twice as much power.
Part #25884 (8 ohms) or Part #25885 (16 ohms) are recommended as
replacements for all drivers listed below . . .
288B
288C
288-8E,G,H,K,L
288D
288-16G,H,K,L
288-32G,H,K
291-8K,L
291-16
A,B,C,K,L
299-8A
299-16A
Aluminum, 24 ohms. Direct replacement not available,
a modification can allow current diaphragms to fit.
Aluminum, 24 ohms. Original Altec part# 20221
Aluminum, 8 ohms. Original Altec part# 23763
Aluminum, 16 ohms. Original Altec part# 23834
Aluminum, 32 ohms. Direct replacement not available
Symbiotik, 8 ohms. Original Altec part# 25692
Symbiotik, 16 ohms. Original Altec part# 21531
Pascalite, 8 ohms. Original Altec part# 25884
Pascalite, 16 ohms. Original Altec Part# 25885
Gary R. Jones
1000 W. Wilshire Blvd. Suite 360
Oklahoma City, OK 73116
Tel: 405-848-3108
Fax: 405-848-3217