ROSS Rock Box RB20 Multi-Effect Processor

Rare item

Step into the arena-rock tone machine that powered a generation—the Ross Rock Box RB20. Often dubbed a secret weapon of the '80s, this rare multi-effects headphone preamp shares DNA with the iconic Tom Scholz Rockman—but ask anyone who's tried both: the RB20 holds its own and then some.

🌟 Used by Def Leppard on the legendary Hysteria album, the Ross Rock Box delivers the soaring chorused cleans and tight, compressed distortion tones that defined the era’s biggest records. Whether you're chasing those unmistakable layered rhythm guitars or lush, stereo-processed lead tones, the RB20 gives you that radio-ready sound—right out of the box.

🎧 Features:

• Built-in Chorus, Echo, and Compression effects
• Stereo headphone output for instant monitoring or direct recording
• Runs on 8 AA batteries or custom adapter with standard 3.5mm headphone jack. Wiring is +6V=tip, -6V=ring, GROUND=sleeve.
• Classic MIT (Made in Taiwan) build from the mid-1980s
• Surprisingly low noise floor and full, articulate tone

🔥 Why This One?

• Rare and clean, in Very Good vintage condition
• Ships fast and FREE with care from a trusted Reverb seller

You don’t see many of these surface—especially not in this condition. If you’re into Def Leppard, Boston, or just want the unmistakable shimmer and snap of '80s arena rock in a compact unit, the Ross RB20 is the real deal.