Page: 3
GAIN ADJUSTMENTS
As higher impedance headphones require more gain and vice-
verse, it is important to be able to match these gain requirements
with the OBH-21mk2. A simple set of miniature switches are posi-
tioned under the headphone amp and with the easy-to-read table
on the base, it is possible to select the most suitable match for
your requirements.
Operating as a pre-amp it is likely to require less gain, so a sepa-
rate setting is provided to allow the user to attenuate the pre-amp
output only, while allowing the headphone output to remain higher.
POWER SUPPLY REQUIREMENTS
In common with all electrical appliances, the OBH-21mk2 needs
a power source (24 Volts DC @ 500 mA). A Creek OBH-Uni cus
-
tom power supply is included to run it, which must be connected
to the unit via the DC inlet (2.1mm positive centre pin power jack)
on the rear panel. The OBH-Uni power supply adaptor should be
plugged into a suitable mains socket which should be matched
for the voltage of the country of use. The OBH-Uni comes with
3 different connectors, for UK, North America and central Eu-
rope regions. Before you can use it, a suitable connection head
should be clipped-on to the adapter.
Note 1:
When new, it is necessary for the OBH-21mk2 to be
‘burned-in’ for at least 24 Hours before its full sound quality po
-
tential can be realised.
Note 2:
Listening to high sound pressure levels for long periods of
time can permanently damage your hearing. Be careful and enjoy
the music.
