The function of the OBH-15 is to boost the level and correct the frequency response
of a low level signal coming from a phono pick-up on a conventional turntable. The
signal required by most modern amplifiers is described as being 'LINE' level, which
is, in technical terms, between 200 and 500 milli-Volts with a flat frequency response.
Unless your amplifier has a specific 'Phono' or Disc input, the level will be too low
and the frequency response will be wrong. The OBH-15 is designed to boost the sig-
nal and introduce an R.I.A.A. frequency response characteristic.
INPUT AND OUTPUT CONNECTION
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 sig-
nal will be boosted to 'LINE' level at its output. To pre-
vent 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 inter-
connect lead.
CREEK OBH-15 SPECIFICATION
MM
MC
GAIN
37 dB
56 dB
FREQUENCY RESPONSE
20 Hz to 20 kHz ± 0.25 dB
SIGNAL TO NOISE RATIO
- 83 dB
- 75 dB
TOTAL HARMONIC DISTORTION
< 0.03%
< 0.05%
R1AA DEVIATION
± 0.5%
± 0.5%
OUTPUT
250 mV
250 mV
OUTPUT IMPEDANCE
<100
Ω
Ω
<100
Ω
Ω
INPUT SENSITIVITY / IMPEDANCE
3.5 mV/ 47 K
Ω
Ω
/ 220 pF
INPUT SENSITIVITY / IMPEDANCE
0.5 mV/ 1000
Ω
Ω
/ 3300 pF
OVERLOAD MARGIN
22 dB 20 dB
MATES WELL WITH MM CARTRIDGES 2.5 mV - 5 mV output
MATES WELL WITH MC CARTRIDGES
0.5 mV - 1 mV output
DIMENSIONS
150 x 100 x 66 mm
POWER SUPPLY VOLTAGE
24V DC 30 mA
Supplied with an OBH-2 High Grade Regulated Power Supply,
220-240V 50Hz or 110-120V 60Hz
Creek Audio Ltd reserves the right to change or modify the specification
of its products without prior warning.
Creek OBH-15
Creek Audio Ltd
12 Avebury Court, Mark Road, Hemel Hempstead HP2 7TA England
Tel:
+ 44 (0) 1442 260146
Fax:
+ 44 (0) 1442 243766
E-mail:
Internet:
www.creekaudio.co.uk
Designed and made in the UK.
Operating
Instructions
