USED BOSS / SD-1 Super Overdrive C4558C [11]

The “SD-1” has long been beloved as BOSS’s classic overdrive pedal.

This unit is equipped with a NEC C4558C op-amp. Serial number 264000. It is believed to have been manufactured between 1981 and 1982.

This unit bears the “Roland Japan” marking and features a Taiwanese circuit board, dating from the period when production methods began to shift away from the so-called “pure” early MIJ models.

The natural drive feel produced by asymmetric clipping remains intact, offering a natural midrange presence that pushes the amp forward and a smooth, rounded distortion. It’s easy to use not only as a standalone overdrive but also as a clean boost, and its high practicality on stage is a hallmark of this model.
It shows significant signs of use, with numerous scratches and stains, but functions perfectly.
Note: This is the unit only.
Condition Grade: B: Shows significant scratches and signs of use, but functions perfectly for normal use

Serial Number: 264000

* As this is a used item, there may be scratches, dents, and other imperfections that are not clearly visible in the photos or not listed here. Please be aware of this in advance.

* This is a one-of-a-kind item that is listed simultaneously on multiple marketplaces, including our in-store display. We strive to promptly remove product listings once an item is sold, but updates may not always be in real time.
We sincerely apologize in advance if the item happens to be sold out after you place your order.