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Randall built the NBKING100-U as a signature tube amplifier head developed in collaboration with guitarist Nuno Bettencourt and Peter King. The amp was positioned as a high-performance, two-channel head aimed at players seeking Bettencourt's characteristic percussive tone, with the design described as combining classic aesthetics with modern circuitry.
The NBKING100-U operated across three selectable modes: a Clean channel, an Overdrive channel, and a Solo mode for sustained harmonic output. The preamp section comprised three channels corresponding to these modes. The output stage was driven by four E34L power tubes, and a VU output meter was fitted to the front panel. A power tube bias section was included. The rear panel carried a series effects loop and MIDI in/thru connectivity. Spring reverb was provided onboard. Control was handled via the included RF2KH three-button footswitch, covering Clean/Overdrive selection, Gain 1/Gain 2, and Reverb. A master volume control was fitted. The head cabinet measured 24.57 × 9.49 × 11.10 inches and weighed 106.92 lbs.
Owners requiring assistance with biasing the E34L output tubes, setting up the effects loop, or troubleshooting the MIDI switching should consult a qualified amplifier technician.
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From spec questions to full builds — players who have lived this gear since 2007.
Since 2007
