1979 Boss SP-1 Spectrum Vintage MIJ Japan Effects Pedal
The Boss SP-1 Spectrum was one of the first 3 Boss compact pedals produced (along with the PH-1 and OD-1). The SP-1 is a single band parametric EQ that boosts "muddy" frequencies that can get lost in a mix. The SP-1 can also be used to create a cocked wah effect due to it's mid-range bump. Unlike the OD-1 and PH-1, the SP-1 was more popular with keyboardists and bassists than guitarists.
Sales of the SP-1 were slow and only around 10,000 of them were produced before it was discontinued.
The Spectrum knob controls the frequency range (between 500hZ and 5kHz and the Balance knob shifts the peak of the signal within the chosen range.
Good shape as pictured, works perfectly.
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