ResonantLive Sound Archive

Equipment file · All-in-one three-way stadium concert array

JM-10

McCune Sound / John Meyer · 1977

Evidence status · documented

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

Large-format, high-output three-way stadium array developed for McCune by John Meyer with Bob Cavin; it debuted on the 1977 Kool Jazz stadium tour and served as McCune’s largest concert system for two decades.

Introduced
1977
Category
All-in-one three-way stadium concert array
Intended use
All-in-one three-way stadium concert array
Production
1977

Equipment photographs · 1

Crew standing beneath a McCune JM-10 array on scaffolding in a stadium

1 / 1 · McCune JM-10 array, designed by John Meyer and Bob Cavin (FOH Fig. 9)

McCune JM-10 array, designed by John Meyer and Bob Cavin (FOH Fig. 9)·FOH magazine; photographer not credited·Rights retained by the rights holder; reproduced for historical commentary

Why it mattered

    Engineering record

    Design aim
    Sold as replacing ten JM-3s, in practice six, with smoother coupling between high-frequency drivers; an analog bucket-brigade delay time-aligned the highs, with a gate to hide its idle hiss.[2]
    Drivers
    Used Meyer’s patented low-distortion compression diaphragm treatment.[1]
    Electronics
    Dedicated processor/amplifier system with an instant hot-backup fail-over circuit designed by Cavin; multicore speaker cables on military-grade hardware.[2]

    Original pricing

    Not documented

    2026 equivalent

    Not calculated without a reliable original price.

    No sourced price has been located.

    Use in the field

    1977 Kool Jazz stadium tour, with JM-3s as out fill.[1][2]

    October 1980: JM-10 mains with Bill Graham Presents’ System 80 centre cluster and Meyer 650 subwoofers for the Grateful Dead at Radio City Music Hall, measured at 140 dB at 10 metres.[2]

    Manuals & original documents

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

    Sources

    1. 1The History of P.A. Loudspeakers, Part 3 (David K. Kennedy, June 2025)FOH | Front of House · reference
    2. 2The Development Of The McCune JM-3 Loudspeaker, Part 2: Additional Components (Michael “Bink” Knowles)ProSoundWeb · reference

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