【Product Description】 This is the BOSS SP-1 Spectrum, an early compact effector. This is a vintage unit made in Japan (Made in Japan) from April 1980, based on the serial number. The SP-1 was one of the first models in the BOSS compact series and is now a highly sought-after vintage effector among collectors and guitarists due to its rarity. It is characterized by its unique filter effect, which adds a distinctive tonal change to guitar and bass sounds. It features a simple two-knob configuration: - BALANCE - SPECTRUM allowing for a wide range of sound shaping. It can dramatically alter the character of the sound and can be used as a boost or for tone shaping. This unit features the red casing design typical of early BOSS vintage pedals and is a highly valuable collector's item, as few appear on the market today. The internal circuit board is also confirmed to be in its original configuration from that era, making it recommended for those looking for vintage BOSS pedals. Early Japanese-made BOSS compacts are increasing in price year by year, and units in good condition are becoming difficult to obtain. This is a recommended unit for vintage effect enthusiasts and collectors. Don't miss this opportunity if you've been looking for one. It's first come, first served. 【Product Condition】 The exterior shows paint peeling, scratches, and damage consistent with use. There is paint peeling, particularly on the sides and bottom. The knobs and jacks are intact, and the condition is standard for a vintage item. The internal circuit board has been inspected and is in age-appropriate condition. Basic operation has been confirmed. 【Accessories】 - Main unit 【Notes】 - The photos show everything included. No other accessories are included. - This item is also listed on other flea market sites, so please understand that it may be sold out.