Based on the Vox® AC-30 Fawn
No Master, No Presence, No Mid, No Bass, No Treble
Vox redesigning the initial preamp of the AC-30. The troublesome EF-86 tube was replaced with a battery of ECC83 (12AX7) tubes. A third channel was also added. By the end of 1960, the initial AC-30 was phased out in favor of the new AC-30 fawn.
The Beatles first recordings in the Abbey Road studio used a fawn.
The early version of this AC-30 was covered in a tan or “fawn” vinyl that was as thin as wallpaper.
A single tone control rolled off the treble on all three channels simultaneously. Individual treble and bass controls were not included in the stock version of the AC-30/ Fawn. An optional factory installed, rear panel mounted “Top Boost” circuit became available in 1961. This circuit added a treble and bass control to the “Brilliant” channel, but not in this fawn model.
The amp also featured two 12 “Celestion Alnico Blue speakers. The Celestion Alnico speakers in the earliest production of the AC-30 Fawn might not have a magnet cover and might be tan, rather than blue.
On-top-boost model. Both the bright channel and the normal channel each, only hit one preamp stage before going to the phase inverter in the power amp. All of the saturation of this amp comes from the power amp, and it can get pretty dirty.
The bright channel is pretty bright when run clean, but that brightness when driving the power amp results in a wonderfully rich and harmonically complex overdrive. It’s quite responsive to saturation with picking dynamics and volume knob control.
Turning up the Bias knob reduces crossover distortion the best, but there are no wrong knob settings. If you like the sound coming out, the knobs are set right for you.