Special Features
The DUALFO has been designed and constructed with care and attention to detail:
- The SYNC edge switch is a high-quality ALPS SPUN push switch, the same type as
commonly found in many mid-range British audio mixing consoles (maybe not Neve or
SSL, but definitely Allen+Heath, SoundCraft, and SoundTracs)
- A Dual Earth system, similar to that employed by MOTM and Oakley, is used to
separate the internal power and signal ground from the front panel and jack ground
This helps keep the noisy external ground away from the internal ground while
remaining completely compatible with existing Euro modular power systems
- Robust power input protection Series Schottky diodes only permit current flow in
the normal safe direction If the power cable is fitted backwards, no current flows
This is in contrast to some Euro modules that use reverse diodes and series resistors,
where during a fault the diodes conduct the full power supply current through the
low-values resistors until you notice a burning smell and/or smoke before turning the
power off! Or other Euro modules that have no protection whatsoever
- Designed for maintenance Signal jacks suffer a lot of mechanical stresses In the
DUALFO all jacks are mounted on easily removable jack boards All pots are standard
16mm commercial types (e.g , Alpha, Alps, BI Technologies, etc) so when they eventually
fail spares should be widely available wherever you are
- All inputs are nominally 51kOhm to minimise loading of signal sources, with special
input circuitry designed to minimise changes of input impedance over the full input
control range
- High quality double-sided FR4 fibre-glass PCB, through-hole plated with solder mask
and silk screen legend, tin-plated, and assembled using lead-free components and lead-
free solder throughout to comply with the European RoHS directive
