Creek Audio Stereo Amplifier OBH 21 User Manual

SPECIFICATION  
Creek OBH 21/21SE  
Headphone Amplifier  
STANDARD  
OUTPUT POWER  
HEADPHONE IMPEDANCE  
THD  
SIGNAL TO NOISE RATIO  
POWER CONSUMPTION  
POWER SUPPLY  
DIMENSIONS  
> 10 mW into 30W  
30Wto 300W  
to 300Wloads  
< 0.01% at 1 kHz  
> 70 dB  
< 4VA  
24V DC 150 mA  
180 x 100 x 66mm (7.4 x 4 x 2.6 “)  
570 gms (20 ozs)  
WEIGHT  
SPECIAL EDITION  
OUTPUT POWER  
HEADPHONE IMPEDANCE  
THD  
SIGNAL TO NOISE RATIO  
POWER CONSUMPTION  
POWER SUPPLY  
DIMENSIONS  
> 10 mW into 30W  
30Wto 300W  
to 300Wloads  
< 0.005% at 1 kHz  
> 70 dB  
< 6VA  
24V DC 250 mA  
180 x 100 x 66mm (7.4 x 4 x 2.6 “)  
570 gms (20 ozs)  
Operating  
Instructions  
WEIGHT  
Thank you for purchasing the OBH 21/21SE headphone amplifier.  
You are now in possession of a state-of-the-art product. The  
functions and operation of the OBH 21/21SE are extremely simple.  
The following notes are provided to explain all aspects of its design  
and use.  
WARRANTY  
If within two years of the purchase date your OBH product proves to  
be defective for any reason other than accident, misuse, neglect,  
unauthorised modification or fair wear and tear, Creek Audio Ltd  
will, at its discretion, replace the faulty parts without charge for  
labour or return carriage within the U.K.This warranty is valid only  
within the U.K. and given in addition to statutory rights. Service  
enquiries outside the U.K. should be addressed first to the  
supplying dealer and or Creek distributor/importer. Warranties  
granted in these countries are entirely at the discretion of the  
distributor.  
The OBH 21 is a miniature audio amplifier, designed specifically to  
drive two pairs of low to medium impedance (30W  
headphones from a line level source. The OBH 21SE is a high end  
version using more expensive components. It is more efficient to  
have a small amp do this rather than waste the power of a full size  
one when only driving headphones.  
to 300W)  
The OBH 21 and 21SE are compatible with any source at line level.  
For example the average output level of a CD player can be  
connected directly to the input of the OBH 21/21SE just as it could  
also be used in conjunction with a stand-alone pre-amplifier or  
integrated amplifier which doesn’t have a headphone socket.  
Creek Audio Limited  
12 Avebury Ct, Mark Road, Hemel Hempstead HP2 7TA England  
Telephone: +44 (0) 1442 260146 Fax: +44 (0) 870 622 0846  
 

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