At the heart of ACG preamps are two filter stacks – a low pass filter and a high pass filter. Each filter has a variable cut off frequency and a variable Q control. The Q control adds a resonant peak at the cut off frequency and seems to exaggerate the effect of the filter.
If you have never used filter based tone shaping, it is hard to imagine how versatile and musical this approach can be. In use it is very intuitive and quick to learn.
ACG preamps are available to fit most basses. They are made in the UK.
For more information:www.acguitars.co.uk
31 Parramatta Rd,
Annandale, NSW 2038
Tel: 02 9516 1975