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Randall built the RD100H-U Divalo as a three-channel, 100-watt all-tube head positioned around a single design priority: gain and tone. It sat within the RD/Diavlo Series, a line Randall described as deliberately stripped of what they considered superfluous features in favour of output and drive.
The amplifier ran on a 12AX7 and 6L6 tube complement and offered three independent channels, each with its own Volume and Gain controls, alongside a shared EQ section of Bass, Middle, Treble, and Presence. A Tube Boost Mode was included, controlled via the Master Volume and Boost control on the front panel. The rear panel carried three speaker output jacks, an XLR speaker-emulated direct output with ground lift, and a Class A discrete instrument-level effects loop with separate Send and Return jacks. A footswitch input accepted the RF4CHB four-function unit, which handled channel selection and Boost switching. The unit measured 27.00 × 9.45 × 10.04 inches and weighed 44.09 lbs.
Owners requiring tube replacement, bias adjustment, or speaker cabinet matching should consult a qualified amplifier technician familiar with high-voltage tube circuitry.
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The catalog shot showed one finish, under one light, a long time ago. Yours has been played. Photos from owners are what the next person finds when they are trying to identify a part, match a finish, or work out whether the one they just bought is really what the seller said it was.
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From spec questions to full builds — players who have lived this gear since 2007.
Since 2007
