The LP-MV (London Power Master Volume) kit seems like a very simple solution to controlling volume without tone change. Will I still be able to use my presence and esonance controls?
Yes. Their function as power-amplifier feedback frequency shapers is unchanged. However, the depth of effect must be kept proportional to the signal size, and the LP-MV takes care of this automatically. There is a trend away from power-amp ‘presence’ controls to preamp ‘presence’ controls. This simplifies wiring and board layouts within the amp. The presence effect is achieved in a different way, but it is difficult – if at all possible – to hear a difference.
