Altec 417-8C, 418B, 421A, 425-8A Musical Instrument Loudspeakers Data (c.1968)
ALTEC musical instrument loudspeakers are designed to provide outstanding reproduction of the music sound spectrum when used in sound systems for the largest theatres and auditoriums. Utilizing heavy permanent magnets, rugged die-cast frames, voice coils of the largest practical diameter that are edge-wound with aluminum or copper ribbon, and exceptionally compliant cone-suspension, these musical instrument trans- ducers comb•ine the advantages of long-term operation with unparalleled response throughout the entire musical instrument frequency range.
