Mozda je malo off topic ali vrag mi nije dao mira...
Reproduced from www.voxamps.com
The Vox AC30 is a 33 Watt, 2x12 Celestion speaker loaded, EL84 powered ‘
Class-A’ valve amplifier. It was introduced in 1959, as a 4-input amplifier (AC30/4) meant to provide the tone of the less powerful 15 Watt AC15 but with more volume and clarity. In 1961, the amplifier design was changed slightly by adding a further channel, the ‘Top Boost’ or ‘Brilliant’ Channel which added a little more gain (AC30/6 or AC30 TopBoost).
http://www.voxamps.co.uk/archive/ac30tb_tbx.asp