Germanium harmonic boost from Spaceman, updated from the original Mercury III circuit. Discrete analog design built around a selected vintage germanium transistor.

The Boost control provides up to 35dB of gain. Two three-position toggles (High and Low) give nine tone-shaping combinations, from treble or mid boost to bass or full-range boost. The Harmonics control blends independently generated even-order harmonics with the dry signal, from light sparkle to octave-like overtones. True bypass. Hand-built in Portland, Oregon.

Includes

  • No box

Condition Note

Photos of all sides have been uploaded so you can review condition in full detail before purchase.

Shipping & Handling

  • Free shipping within the US
  • Ships within 3 business days of purchase

Listed6 days ago
ConditionVery Good (Used)
Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more
Brand
Model
  • Mercury IV Germanium Harmonic Boost
Finish
  • Black/Black Edition
Categories
Year
  • 2010s
Made In
  • United States
Pedal Format
  • Standard

Product safety information may be available here.

Art Andrews

North Las Vegas, NV, United States
Joined Reverb:2024

Reverb Protection

Simple Returns, Secure Transactions, Human Support

Learn more

Secure Checkout

Promoted similar listings













Product reviews

Reverb Gives

Your purchases help youth music programs get the gear they need to make music.

Oops, looks like you forgot something. Please check the fields highlighted in red.