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It is known that it is the 'brilliant' model (or top boost) and it was Edge's earliest amp used to record every U2 album Since the higher output AC30/4 shared its preamplifier design with the lower powered AC15, Vox discovered the high-gain EF86 tube was susceptible to microphonics, or even failure, when exposed to the increased vibration present in this uprated amp.Vox soon tired of the problem so to cure AC30/4 reliability issues caused by the troublesome EF86 preamp tube, in late 1960 Vox redesigned the preamp circuit, replaced the EF86 with an ECC83 (12AX7), and released this new design as the AC30/6.
As rock raged through the late ’50s, though, a more powerful amp was needed.
In late 1959, Denney and Jennings first tried using two more powerful EL34 tubes in a short-lived AC30, then simply doubled the AC15’s output stage to four EL84s to give birth to the amp we know and love today.
The Vox AC30 is a guitar amplifier manufactured by Vox.
It was introduced in 1958 to meet the growing demand for louder amplifiers.
Ventilation was provided by three small brass vents on the top of the cabinet, and the TV-front's single suitcase type handle was replaced with three leather straps.
The Edge's almost-original Vox AC30/6 from 1964, housed in a '70s cabinet on stage.
The AC30’s cathode biasing and lack of negative feedback give plenty of sparkling, slightly unchained chime to the guitar’s upper-mids and highs, thanks to the way they encourage second-order harmonics as artifacts of distortion.
This offers a flattering tonality at low and middle volume levels, and a creamy, textured overdrive when cranked.
The AC30 evolved from Vox’s debut amp of 1957, the AC15, which has often been describe as the first amplifier designed specifically for the guitar (rather then being cobbled together from standard amplifier circuits supplied by the tube manufacturers).Tags: Adult Dating, affair dating, sex dating