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615 Bloomfield Ave.
Verona, New Jersey
07044
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Shop Online
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Newsletter
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Showroom Hours
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Mon.
Tues.
Wed.
Thurs.
Fri.
Sat.
Sun.
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10 - 6
10 - 8
10 - 6
10 - 8
10 - 6
10 - 4
Closed
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Creek OBH 21 Headphone Amp
(OBH1 power supply included)
Creek OBH 21se Headphone Amp
(OBH2 power supply included)
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OBH 21
$295.00
OBH 21SE
$449.00
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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.
Following on the success of the OBH-11, the new Creek OBH-21 & OBH-21SE
incorporate more advanced circuitry
utilising professional standard operational amplifiers. The discrete transistor technology used in the OBH-11 has been replaced by high-grade integrated circuits providing a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 1/4" (6.3mm) 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. 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. The power supply may vary depending on country of use.
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 can also be used in conjunction with other Creek OBH series products, such as
Phono pre-amplifiers or the passive pre-amplifier. Furthermore, it also functions with a stand
-alone pre-amplifier or integrated amplifier without headphone output, connected in the tape loop.
The cosmetic difference between the OBH-21 and its predecessor the OBH-11 is striking.
Featuring a 50% longer case, the new models have a solid 5mm brushed silver anodised
aluminium front panel with black printing.
The OBH-21 miniature audio amplifier is the ideal way to enjoy your favourite music in privacy.
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Specifications
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OBH 21
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OBH 21SE
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Output power
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>10 mW into 30 to 300 ohm loads
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>10 mW into 30 to 300 ohm loads
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THD
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0.1% at 1 kHz at rated power
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0.05% at 1 kHz at rated power
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Signal to noise
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70 dB
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70 dB
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Power consumption
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< 4 W
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< 4 W
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Power supply requirements
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24 V DC 150 mA
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24 V DC 150 mA
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Size
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180 mm x 100 mm x 65 mm
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180 mm x 130 mm x 65 mm
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Weight
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360 gms
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360 gms
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Power Supplies
The OBH-1
is a simple 24 Volt 3 Watt plug-in the wall power supply. Although, it does have a proper bridge rectifier and 1000 uF smoothing capacitor, it is not powerful enough for some OBH applications and doesn't regulate the voltage. It is also not suitable for the P43 in active mode.
The OBH-2
is a 24 Volt 12 Watt regulated power supply, that can sit on the floor or a desk top. It contains a bigger transformer and uses a fully short circuit and over temperature protected voltage regulator. The ripple current has been completely eliminated from this supply, so it is very suitable for use with OBH components that amplify, like the phono or headphone amplifiers.
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Questions?
1.973.239.1799
