The BOSS SP-1 Spectrum was an effect that boosted a select band of frequencies, so that instruments with a tendency to be “muddy” - such as electric bass - could be brought out in the mix. But the SP-1 also proved to be very popular among keyboard players, who paired it up with electric pianos. These days acquiring a well kept Spectrum can easily take you beyond $500
02/25/2017: ToneHome is looking for an Ibanez CS-505 narrow box first issue with flying fingers side graphic. Any hint is highly appreciated. Other than that we're looking for boxed effects or just boxes for Ibanez narrow box GE-601, AD-80, CP-835, OD-850. Please submit your offers or leads here: e-mail