The original and popular Oakley Filtrex design has been updated to create a new powerful filter processing unit. The Filtrex II contains:
A four pole true analogue filter. This is based on the famous transistor ladder filter developed by Dr Bob Moog in the 1960s. A front panel pot controls the filter cut-off frequency, another controls the resonance. The resonance control is configured not to cause volume drop when turned up. The filter can be made to oscillate if required.
