McGillwell  is the company of Manfred Sigmann from Mönchengladbach, Germany.

    Timeline (by Manfred Sigmann)

    • 1980 producing first “McGillwell Active Booster”
    • 1981 producing first “McGillwell FET-Booster” and “McGillwell Superbooster”, both with Soundcontrol 
    • 1982 producing “McGillwell JAZZ-Booster” with clean Sound for Fender Rhodes and acoustic instruments 
    • 1983 producing “McGillwell Chorus-Flanger” with Stereo-output
    • 1985 producing “McGillwell Tube-Preamp”

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