effect loop and power attenuator for reducing the power in 3 stages. The VOX AC Custom series is now also available in the top version with a speaker cabinet. The VOX AC30CH and AC15CH are tops that are based entirely on the classic AC30. Thanks to the new reactive damping, they are even more flexible and impress both on stage and at living room volume. Amplifier tops and speaker cabinet with the classic VOX look and sound Like all amps in the Custom series, the AC30CH and AC15CH tops contain 12AX7 preamp and EL84 power tubes. For the "classic" British sound, we recommend using the V212C speaker cabinet with two 12" Celestion G12M Greenback speakers. Separate volume controls are available for the Normal and Top Boost channels. The Top Boost channel also has a Treble and Bass control. The master section contains a VOX Tone Cut and a Master Volume control, which can be used to achieve the unrivalled VOX sounds - from pearly "clean" to brutally overdriven. Of course, the AC30CH and AC15CH also contain the VOX tremolo effect and the spring reverb from the Custom series. These effects can be activated/deactivated with an optional VOX VFS2A footswitch. What is meant by 'reactive damping'? This is a newly developed damping circuit that uses VOX Reactor technology to measure how strongly the speaker is driven and optimizes the interaction of the speaker with the amplifier. The advantage of this approach is that the sound at home at low volume is just as fat and powerful as it is at rehearsal or in concert. You won't find such a realistic response anywhere else.