1 TheNocturneBrain 5 months ago Free NOS ‘70s toshiba chip upgrade & vintage alum. knob upgrade AND stateside delivery by Dec. 24, ..on the Mystery Brain BS-301 purchased 2day! an $85 savings deal.. www.thenocturnebrain.com 100% analog vintage tone, texture and dynamic replication of the 70's Japanese RE-301 Space echo PREAMP w a boost mode, AND a digi Tape echo sim using analog photocell modulation for chorus or vibrato in the slapback. Tape Echo uses a low res digi chip for its repeats but the entirety of its circuit is analog including the opamp preamp section and boost section of photocell modulation. yep!