Altec Lansing 288-8G, 288-8H, 288-8K, 288-8L, 288D Reference

Gary R. Jones

1000 W. Wilshire Blvd. Suite 360
Oklahoma City, OK 73116
Tel: [phone]
Fax: [phone]

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: [phone]
Fax: [phone]

SMALL FORMAT HF COMPRESSION DRIVERS

Early 604's and 800 series high frequency drivers used Alnico motors, most with a
circumferential phase plug. Later 604-8K and 900 series drivers used ceramic
motors with Tangerine® phase plugs. All use 1.75" voice-coils and diaphragm
assemblies and they can be interchanged.

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 - 15kHz). The
aluminum and “Pascalite” diaphragms (500Hz - 20kHz) are all aluminum or
aluminum alloy. The "Pascalite" diaphragm has the sonic quality of the aluminum
diaphragm and handles twice the power.

Part #26420 (8 ohms) or Part #26421 (16 ohms) are recommended as
replacements for all drivers listed below . . .

604-8G,H,K
802-8D,E,G,T
806-8A,B
902-8A,B,T
604B,C,E,
605A,B
802B,C,D
804A,B
806A,Z
902-16A,B
807-8A,Z
808-8A,B,Z
904-8A
808-16A Symbiotik, 16 ohms. Original Altec part# 35153

Aluminum, 8 ohms.
Original Altec Lansing part# 34647

Aluminum, 16 ohms.
Original Altec Lansing part# 34852

Symbiotik, 8 ohms.
Original Altec Lansing part# 34726

909-8A Pascalite, 8 ohms. Original Altec part# 26420
909-16A Pascalite, 16 ohms. Original Altec part# 26421