VOX Amplification USA VTX150 - Manual (Page 27)

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EXT (Extra)
This California designed two channel amplifier utilized five modes and four
5AR4 tubes in a high-voltage design with switchable solid state and tube
rectification that gave the amp increased headroom and variable dynamics.
When this amp was discontinued it broke many hearts.
5. VOX AC15
STD (Standard)
This models the AC15TB, which combines the beautifully sweet tonal character
of the AC15’s low output power amp with the sound-creating flexibility of the
AC30’s top boost channel.
SPL (Special)
This models channel 2 of the VOX AC15 (1x12", 15W), which was manufac-
tured in 1962 and was a big hit for its compact cabinet, power, and great tone –
along with then-popular British bands.
CST (Custom)
Designed to emulate the tones of the thick channel on the VOX Night Train
Amplifier this tone is a modern take on the classic VOX pairing of 12AX7
preamp tubes and EL84 power tubes. Think Classic British Crunch.
EXT (Extra)
The VOX AC4 was originally released as the AC2 practice amp in 1958. After
giving the amp a larger speaker and a few design tweaks it was re-launched as
the AC4 in 1962. Electronically, the AC4 used four tubes: one 12AX7 and one
EF86 preamp tube, one EL84 power tube and one EZ80 rectifier.
6. VOX AC30
STD (Standard)
This models an AC30 amp with a “top boost” circuit that was included as
standard beginning in 1964. It delivers a smooth and refined top end, a majesti-
cally deep overdrive, and a rich, brilliant clean sound.
SPL (Special)
Designed after our VOX Hand-wired Heritage AC30H2 this model provides
the sparkle that is synonymous with the pairing of a classic VOX amplifier and
the famed Celestion Alnico Blue.
CST (Custom)
This models the AC30BM Brian May signature model which faithfully repro-
duces every nuance of the legendary original AC30 from the 1950’s. This
setting provides the screaming sound of the amp being overdriven with the
treble booster turned on.
EXT (Extra)
This original design utilizes an expanded set of tonal controls but is heavily
inspired by an early AC30 with warm lows, dampened attack, brilliant bell like
top-end and musical compression often attributed to the Celestion blue alnico
speaker.