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A U D I O, I N C
WWW.BUTLERAUDIO.COM
OWNER'S INFORMATION FOR
MODELS 5150 & 3150
MODULAR DIRECT-COUPLED
VACUUM TUBE DRIVEN
MULTI CHANNEL POWER AMPLIFIER
UTILIZING
T H E R M I O N I Cb
VACUUM TUBE TECHNOLOGY
Concept & Design: B K Butler
Patented in the USA
Worldwide patents pending
"Tube Driver", "Tube Driver Blue", "Thermionic" and Blue Tube illumination appearance / method are
trademarks of or patented by
BK Butler