Creek Audio OBH-12 Operating Instructions

CREEK OBH-12 SPECIFICATION
INPUT IMPEDANCE
OUTPUT IMPEDANCE
SEPARATION
ATTENUATION
INPUTS
OUPUTS
RELAY MUTING FACTOR
POWER REQUIREMENTS
POWER CONSUMPTION
DC CONNECTOR TYPE
INPUT & MUTE INDICATION
TAPE MONITOR INDICATION
SIZE
WEIGHT
Creek Audio Ltd reserve the right to change or modify the specification of its products without prior warning.
Creek Audio Ltd
2 Bellevue Road, Friern Barnet, London N11 3ER, England
Tel: 00 44 + (0)181-361 4133 Fax: 00 44 + (0)181-361 4136
E-mail: mcreek@ibm.net Internet: www.creekaudio.co.uk
< 50 kΩ Ω
0 - 50 kΩ Ω
> 80 dB's @ 1kHz
0 - 90 dB's
3 Stereo pairs, inc Tape
2 Stereo pairs, 1 fixed, 1 variable
> 90dB's
24v @ 60 mA
2W max
2.1 mm female DC jack
2 Tri-colour LED
Yellow round LED
100 x 130 x 60 mm
4" x 2·4" x 5''
420 g, 1lb
Designed and made in the UK.
Creek
Thank you for purchasing the OBH-12 Infra-red remote control passive Pre-Amp. You
are now in possession of a State of the Art product. The functions and operation of the
OBH-12 are extremely simple. However, the following notes are provided to explain all
aspects of its design and use.
OVERVIEW
The function of the OBH-12 is to provide input selection
and volume adjustment to your Hi-Fi system from your
armchair, via infra-red remote control.
The unit consists of a motorised volume potentiometer,
and two stereo relays which select the desired input
and tape output, together with a muting relay that can
short the signals to ground. A built-in micro-controller
decodes the infra-red signals transmitted by the hand-
set and translates them into commands which activate
the motorised potentiometer and the muting and input
selection relays. After each operation, the micro-con-
troller turns itself off to avoid any possibility of interfering
with the main music signal. LED’s are used to indicate
the status and mode of operation.
The OBH-12 is purely passive and does not introduce
any gain or distortion into the signal path. It is therefore
suitable to be used as a control Pre-Amp, provided the
sensitivity of the power amp that is being used is high
enough to be driven directly from the source. i.e. CD or
Tuner etc.
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12
OBH
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