Guitar Pedal X - GPX Blog - PastFX's Spectrum Collection Revives Buffalo FX Pedals in Superb Smart Compact Enclosures - utilising the same High Quality Components
Source Audio SA248 Spectrum Intelligent Filter Pedal for sale online | eBay
Boss SP-1 Spectrum - silver screw, rare vintage pedal, mint condition | #1778186774
BOSS SP-1 Spectrum Guitar Effects Pedal MIJ 1979 #8 Skeleton Switch DHL or EMS for Sale - Fleetwoodmac.net