1. Although the AC4TV has a power switch it's just a switchable set of resistors that go between the amplifier and the speaker (an attenuator).
   VOX have added a couple of things to the attenuator circuit try and maintain the tone as the power is reduced but it does suck the tone and even at 1/4Watt it's still TOO LOUD for most people to be able to crank it up and get the true valve distortion sound that they are looking for - even a bluesy crunch will not be achieved until the amp is pretty loud.
   In a medium size room, which is where most people have to practice, a 1 watt valve amp can be so loud that you would have to shout really loud to be heard (about 100 decibels) - and around 1/10th of a watt is what is often referred to as “bedroom level” for late night noodling.

   By adding a Master Volume control and Power-Scaling™ you can achieve any level and combination of pre-amp and output stage distortion down to less than 1/10th watt.
   (see http://www.londonpower.com/pscaling.htm)

   
   The AC4TV responds extremely well to Power Scaling as most of the distortion comes from the output tubes.

About our modifications

We fit Power Scaling™ with a Master Volume with very little change to the control panel layout. 

*Please note that I am licensed to install Power Scaling™ and use genuine London Power components for the Power Scaling™ circuit.

Modification Options

1. Power Scaling™ with Master Volume. 4 watts down to 0.1 watt of pure valve tone
   (see the Power Scaling page and FAQ's)