Figure 7: Chorus delay time trimpot (factory set at 10 ms - middle marking)
EXPRESSION PEDAL
An expression pedal can be plugged into the jack marked ‘EXP’ to control the speed of
the LFO by foot. We’ve found the Boss EV-5 to give the best utility and feel of expres-
sion pedals tested so far. It’s low maximum resistance of 10K does limit the LFO range
from approximately 1.8 to 10 Hz, but gives a nice controlled feel throughout this range.
POWERING
The Halo Chorus ships with a compact 24VDC switching adapter (identical to the one
used with the Memory Lane). Since the Halo is internally regulated to 15V, any DC
power source from 18 to 24V, positive pin configuration, providing 100 mA of current,
can be used to power the unit. With appropriate cabling, many commercially available
pedal power supplies such as the Voodoo Labs Pedal Power 2, Dunlop DC brick and ped-
algear Juicebox can be used to power the Halo Chorus. Also, if you already have a Mem-
ory Lane and are using the provided 24VDC adapter, the Halo Chorus can be run at the
same time as the Memory Lane from the single adapter with an inexpensive break-out
cable available from Boss. Email us at
if you have any ques-
tions at all about powering scenarios and cabling.
Note: the Halo Chorus immediately powers up upon insertion of power to the DC power
jack - this is different than the Memory Lane which requires both DC power AND the in-
sertion of a plug into the input jack.
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Halo Chorus user manual v1.01
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9
20 ms
10 ms
7.5 ms
