All the pedals on my board are 9volt DC regulated, except one which requires a 12 volt
un-regulated (or an 18volt regulated) supply. The pedal's current draw is 35mA at
From the manufacturer's website:
An un-regulated +12V
AC to DC adapter rated at 500mA is required based on the following: The ETHOS provides
filtering circuitry that removes the noise (60 Hz Ripple) from typical AC to DC
unregulated power adapters. This filtering circuitry develops a voltage drop across it, so
the adapter voltage becomes +9VDC by the time it reaches the ETHOS analog circuits.
Additionally, an unregulated +12VDC supply (not a regulated supply) is required due to the
fact that it actually outputs 15 to 16 volts with the ETHOS load. This higher voltage
provides the adequate headroom for the ETHOS to operate correctly. Using a +9VDC AC to DC
external adapter will result in poor ETHOS performance.
I found this:
It seems to be usable with a 9v daisy chain, and will increase voltage from
9v to 18v, maximum current output 30ma.
From my elementary electronics it
should work since, at 18volts, 17.5ma should be adequate for the pedal, so this actually
gives me 12.5ma reserve current draw (please correct me if I'm wrong).
the manufacturer seems to be quite keen on maximum headroom (they supply a 12V unregulated
adapter with 500 ma).
This adapter would however, simplify the power supply
to my pedal board. Expert advice most appreciated.
Edited by Jay Menon (18/02/12 09:37 AM)