Source Audio Spectrum Intelligent Filter – Thomann UK
That Pedal Show's Dan and Mick Talk Spectrum - Source Audio Website
Fishman Aura Spectrum DI Imaging Pedal with D.I. | Sweetwater
Spectrum Intelligent Filter, An 'All-in-One Filter Extravaganza' introduced by Source Audio – MusicPlayers.com
Source Audio Spectrum Intelligent Filter | Reverb
Source Audio Spectrum Released, The Next Level Of Filter Guitar Pedals
Spectrum Analyzer | Dr Scientist
Boss SP-1 Spectrum - Pedal on ModularGrid
Source Audio Spectrum Intelligent Filter | Reverb
Boss SP-1 Spectrum - silver screw, rare vintage pedal, mint condition | #1778186774
TONEHOME - the World of Vintage Guitar Effects Pedals - SP-1 Spectrum
Fishman Aura Spectrum DI Acoustic Pedal | zZounds
Source Audio One Series Spectrum Intelligent Filter Effects Pedal - Tone Tailors
Boss Classics
Vintage BOSS 1980s SP-1 Spectrum Equalizer Pedal | Musician's Friend
Fishman Aura Spectrum DI Acoustic Imaging Pedal
Guitar Pedal X - GPX Blog - PastFX's Spectrum Collection Revives Buffalo FX Pedals in Superb Smart Compact Enclosures - utilising the same High Quality Components