Creek Audio OBH 15 User Manual
Page 2
INPUT AND OUTPUT CONNECTION
WIRING THE OBH 15
The output from the turntable is normally terminated on two
'Phono' plugs or RCA jacks. The level is dependent on the type of
cartridge used, and in the case of moving magnet will normally be
around 2 - 5 milli Volts and for moving coil - 200 - 500 micro Volts.
Most MM or high output MC cartridges will be properly matched by
using the OBH 15. By plugging the signal leads from your turntable
into the OBH 15 input, the signal will be boosted to 'LINE' level at
its output. To prevent hum pick-up, it may be necessary to join the
turntable's earth lead to the OBH 15 ground terminal.
The output from the OBH 15 can be connected to most integrated
amplifier’s and pre-amplifier's line inputs via a regular Phono to
Phono (RCA to RCA) stereo interconnect lead.
The output impedance of the OBH 15 is <100 W, therefore it can be used
Connect the OBH 15 to the input of your amplifier with a stereo
to drive long interconnects without loss, provided they are high
RCA inter-connect cable. If using a Creek integrated amplifier
capacitance types.
connect to the first input.
The OBH 15 is a switchable phono pre-amplifier, allowing you to
POWER SUPPLY REQUIREMENTS
change from moving magnet to moving coil from a switch on the
In common with all electrical appliances, the OBH 15 requires a
rear panel.
power supply.
The connection for the phono output from the turntable plus
The requirement for the OBH 15 is for 24 Volts DC at 30 milli-Amps
ground is clearly marked for MM and MC. Once connected select
current, minimum. A custom Creek power supply (Creek-Uni) has
MM or MC from the switch located on the rear panel.
been provided and this must be connected via the DC inlet on the
rear panel of the OBH 15.
The power supply is connected to the 2.1mm positive pin power
jack and then to the wall socket. The OBH 15 should be placed
The power supply which has been provided is a
away from power supply hum fields for the lowest noise operation.
NOTE
Due to the inherent muting circuitry in the OBH 15, the signal will
take a few seconds to be heard after the power is switched on.
It is necessary for the OBH 15 to be ‘burned in’ for at least 24 hours
The on/off switch is located on the rear panel. As the OBH 15 draws
before its full sound quality potential can be realised.
very little power it may be left switched on permanently.
switchable supply
with a universal input range of 100 – 240 Volts. The Creek-Uni
power supply is supplied with a pack of universal plug fittings to
adapt for Europe, U.K. and the Far-east, USA and Australia.
Choose the correct fitting for your country of use and simply snap
in place.