Great Vintage Loudspeakers

GPA is the source for original parts and warranty service for Altec Lansing Professional, which was a division of Altec Lansing Technologies. This includes all of their speaker products that were built through 2005. As always, these products will be repaired using the original parts made from original tooling and materials, thus assuring that their performance will meet original specifications.

Don't be fooled by imitators – no one else can manufacture diaphragms for your Altec high frequency compression drivers that perform exactly as the originals did! The GPA team of skilled craftsmen were all long-time Altec employees, assuring that our parts and service meet and exceed original Altec Lansing standards for performance, quality, and durability.

We at Great Vintage Loudspeakers, Germany service products of Altec, Great Plains Audio, Electro Voice and JBL.

Informations from Gary R. Jones, 1000 W. Wilshire Blvd., Suite 360, Oklahoma City, OK 73116, USA

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...

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 . . .