entry level standalone headphone amplifier

Leaflet - Instructions

The OBH-11 is a miniature audio amplifier, designed specifically to drive a single pair of low to medium impedance (30 Ohm -300 Ohm) headphones from a line level source.

The OBH-11 is compatible with any source at line level. For example: an average output level CD player can be connected directly to the input of the OBH-11, just as it could also be used in conjunction with a stand-alone pre-amplifier or integrated amplifier which doesn’t have a headphone output.

Technical Specification detailed technical information
Output Power > 10 mW into 30 ohm / 300 ohm loads
Headphone Impedance 30 ohm to 300 ohm
Total Harmonic Distortion < 0.01% at 1 kHz
Signal To Noise Ratio > 70 dB
Power Consumption < 4 VA
Power Supply Requirement 24V DC 150mA (Uni-OBH)
Weight 360g
Size W/H/D 130 x 100 x 65mm

Creek has re-engineered the casework of the old OBH 11, so the front panel is now much thicker and has rounded corners, new style graphics and the metal logo found on the more expensive Creek products. It is ONLY available in black and is an addition to Creek’s range of popular headphone amplifiers.

OBH Uni Power Supply Adaptor

The OBH-Uni is a multi-region, 24V, 0.5A power supply adaptor.

Creek originally developed this power adaptor to simplify the requirements for selling OBH products in all countries. However, extensive listening tests and comparisons proved that this high efficiency regulated power adaptor can also extract the best performance from all of Creek’s OBH products. This includes the latest OBH-15mk2 Phono Pre-amp, which has high-gain and is therefore more demanding of its power supply’s purity.

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It is supplied with three different snap-on power-plugs suitable for Europe, UK and USA. The snap-on head on the latest version of OBH-Uni uses a 2 pin, figure 8 connector, so it’s possible to use a 2 pin figure 8 extension power cord, with alternative mains plugs on the end. It provides a stable output from any input mains voltage range from 100 – 240V.

Strict international regulations make it unacceptable to use conventional linear power adapters because, if they are left permanently switched-on, their standby power will definitely exceed the 0.5W limit. The latest OBH-Uni draws less than 0.5W when idle, or plugged-in but not used. It is also silent in operation, from zero to maximum current consumption.