This is a rare, very early-production OD-1 featuring a Raytheon 3403 quad op-amp!! Center-stamped serial number.
Early OD-1 models featured a quad op-amp (a module containing four op-amps). While the RC3403ADB was used in the very earliest models and the NEC μPC4741C was used in units from lot #8400 to #8800, this unit features the former.The LED indicator is dedicated to the battery checker and differs from the specifications of the current BOSS Effector.Units equipped with the RC3403ADB are characterized by a somewhat tight low end, extended highs, and a bright, crunchy sound. This is a rare gem that allows you to experience the original sound of the legendary OD-1!! This unit’s serial number is #6400 (center-stamped serial!) and is believed to have been manufactured in November 1977.
PCB: 052-281A
OP-IC: RC3403ADB (#RAYP7733)
External spring-loaded transparent switch
LED: Battery checker type
ACA specification
MADE IN JAPAN
*Internal insulating foam missing; retaining screw and coin screw rubber bushings replaced
Year: 1977
Accessories: None
Contact: Sano
*The warranty periodis one month from the date of purchase.
Click here to read our column "The Beginning of a Legend: A Thorough Analysis of the Appeal of the 'BOSS OD-1 "Silver Screw" Era" → https://tcgakki.com/pages/magazines-boss-od1
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