ResonantLive Sound Archive

Equipment file · One-third-octave passive equaliser

Acousta-Voice equaliser

Altec Lansing · 1967–68 (sources differ)

Evidence status · documented

Identity and core specifications are documented; some historical fields remain unavailable.

Passive one-third-octave filter set by Art Davis, Jim Noble and Don Davis; a broadband alternative to narrow-band feedback notching.

Introduced
1967–68 (sources differ)
Category
One-third-octave passive equaliser
Intended use
One-third-octave passive equaliser
Production
1967–68 (sources differ)

Why it mattered

    Engineering record

    No technical figures are published here until a working source confirms them.

    Original pricing

    Not documented

    2026 equivalent

    Not calculated without a reliable original price.

    No sourced price has been located.

    Use in the field

    No named deployment could be tied to this exact item by a checked source yet. Know of one? Suggest it on the contribute page.

    Manuals & original documents

    No authoritative manual or original document has been located for this profile.

    Sources

    1. 1RaneNote 122: Operator Adjustable Equalizers (Dennis Bohn)Rane · reference · link pending
    2. 2A Conversation with SynAudCon Founders Don & Carolyn DavisProSoundWeb · reference · link pending

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