Boss SP-1 Spectrum Pedal- Japan - Aug 1978 - Black Label ( NO BOX) ( Pre Owned)
SKU: CON134
Boss SP-1 Spectrum Pedal- Japan - Aug 1978 - Black Label ( NO BOX) ( Pre Owned)... Very Rare
The BOSS SP-1 Spectrum is a vintage, single-band parametric equalizer pedal, popular for boosting specific frequencies to cut through a mix, with a fixed boost for a selected band of 500Hz to 5kHz controlled by the Spectrum knob and a level control via the Balance knob. Key specifications include aĀ 9V DC power requirement, 3.5mA current draw, 220kĪ© input impedance, and over 600kĪ© output load impedance.Ā It also features a battery check lamp and an FET switching system for effect changeover.Ā Ā
Controls
- Spectrum:Ā Sweeps the center frequency of the effect from 500 Hz to 5 kHz.Ā
- Balance:Ā Adjusts the mix between the direct and affected sound, controlling the peak of the boost.Ā
- Normal/Effect Switch:Ā Changes between buffered bypass (normal) and the effect.Ā
- Battery Check Lamp:Ā Also confirms the Normal/Effect changeover.Ā
SpecificationsĀ
- Power:Ā 9V Battery or AC Adaptor (ACA series)
- Current Draw:Ā 3.5mA
- Frequency Range:Ā 500 Hz ā 5 kHz
- Input Impedance: 220 kΩ
- Output Load Impedance: Over 600 kΩ
- S/N Ratio:Ā Over 80 dB
- Dimensions:Ā 70(W) x 55(H) x 125(D) mm (2-3/4" x 2-3/16" x 4-15/16")
- Weight:Ā 400g (0.88 lbs)
- Jacks:Ā Input, Output, AC Adaptor
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Limited Production:ĀThe SP-1 was produced in limited numbers and is now a sought-after collector's item.Ā
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Unique Effect:ĀIt was one of the first BOSS effects of its kind, a single-band parametric EQ, designed to add character and boost clarity, rather than distortion.Ā
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Usage:ĀWhile popular with keyboard players for clarity and bassists for cutting through a mix, it can also give guitars a unique, bright, and snappy tone.Ā
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