OBH 21 & OBH 21SE
Headphone amplifier
Headphone amplifier
Creek headphone amplifiers eliminate the use of a full size amplifier for boosting the power when
only headphones are used. An average output level CD player or tuner can be connected directly
to the input of the headphone amplifier.
The OBH 21 & OBH 21SE incorporate advanced circuitry utilising professional standard
operational amplifiers. The discrete transistor technology used in the model OBH 11 has
been replaced by high-grade integrated circuits providing a capability to drive different types and
impedances of headphones without problem.
There are two 6.3mm (1/4“) stereo headphone jacks on the front panel of both models. The
output level is regulated by the volume control on the front panel.
When using the OBH 21 one source can be amplified as the headphone amplifier has only one
stereo input. (See image) It has stereo phono sockets (RCA jacks) on the rear panel for input
from any line level source, together with a DC power jack. In common with all electrical
appliances, the OBH 21 requires a power source. A custom power supply is provided, which must
be connected to the unit via the DC inlet (2.1mm positive centre pin power jack) on the rear panel.
Internally advanced circuitry is used to split the power supply from a single positive to a split
positive/negative supply, which allows circuits to be DC coupled and to eliminate capacitors on
the SE version.
The SE version uses higher-grade components throughout. It also features two pairs of stereo
Phono sockets (RCA jacks) on the rear panel for input from any line level source and chain
linking to another product in a tape loop circuit.
The DC power jack for connection to a custom OBH high-grade power supply adaptor is also
located on the rear panel.
The OBH 21 and OBH 21SE can also be used in conjunction with other Creek OBH series
products, such as Phono pre-amplifiers or the OBH 22 passive pre-amplifier. Furthermore, they
also function with a stand-alone pre-amplifier or integrated amplifier without headphone output,
connected in the tape loop.
The OBH-21 or higher grade OBH 21SE miniature audio amplifiers are the ideal way to enjoy
your favourite music in privacy.
only headphones are used. An average output level CD player or tuner can be connected directly
to the input of the headphone amplifier.
The OBH 21 & OBH 21SE incorporate advanced circuitry utilising professional standard
operational amplifiers. The discrete transistor technology used in the model OBH 11 has
been replaced by high-
There are two 6.3mm (1/4“) stereo headphone jacks on the front panel of both models. The
output level is regulated by the volume control on the front panel.
When using the OBH 21 one source can be amplified as the headphone amplifier has only one
stereo input. (See image) It has stereo phono sockets (RCA jacks) on the rear panel for input
from any line level source, together with a DC power jack. In common with all electrical
appliances, the OBH 21 requires a power source. A custom power supply is provided, which must
be connected to the unit via the DC inlet (2.1mm positive centre pin power jack) on the rear panel.
Internally advanced circuitry is used to split the power supply from a single positive to a split
positive/negative supply, which allows circuits to be DC coupled and to eliminate capacitors on
the SE version.
The SE version uses higher-
linking to another product in a tape loop circuit.
The DC power jack for connection to a custom OBH high-
The OBH 21 and OBH 21SE can also be used in conjunction with other Creek OBH series
products, such as Phono pre-
The OBH-
Specification
Output power
Headphone impedance
Total Harmonic Distorton
Signal to noise ratio
Power consumption
Power supply requirement
Power supply
Size
Weight
Finish
Warranty
Output power
Headphone impedance
Total Harmonic Distorton
Signal to noise ratio
Power consumption
Power supply requirement
Power supply
Size
Weight
Finish
Warranty
OBH 21
> 10 mW into 30 - 300 Ohm loads
30 - 300 Ohms
<0.01% at 1 kHz
> 70 dB
< 4 VA
24V DC 150 mA centre positive
Creek OBH Uni
100 x 180 x 65
360 g
Silver
Two years original purchaser only
Warranty valid in country of purchase
> 10 mW into 30 -
> 70 dB
< 4 VA
24V DC 150 mA centre positive
Creek OBH Uni
100 x 180 x 65
360 g
Silver
Two years original purchaser only
Warranty valid in country of purchase
Specification
Output power
Headphone impedance
Total Harmonic Distorton
Signal to noise ratio
Power consumption
Power supply requirement
Power supply
Size
Weight
Finish
Warranty
Output power
Headphone impedance
Total Harmonic Distorton
Signal to noise ratio
Power consumption
Power supply requirement
Power supply
Size
Weight
Finish
Warranty
OBH 21SE
> 10 mW into 30 - 300 Ohm loads
30 - 300 Ohms
<0.005% at 1 kHz
> 70 dB
< 6 VA
24V DC 150 mA centre positive
Creek OBH Uni
100 x 180 x 65
360 g
Silver
Two years original purchaser only
Warranty valid in country of purchase
> 10 mW into 30 -
> 70 dB
< 6 VA
24V DC 150 mA centre positive
Creek OBH Uni
100 x 180 x 65
360 g
Silver
Two years original purchaser only
Warranty valid in country of purchase
Copyright © Epoz 2011