Input and Output Connections

The OBH-11 has two pairs of stereo phono sockets (RCA jacks) on the rear panel. The first pair is the Input from any line level source, direct from the source or via the tape output of an amplifier. The second pair of sockets, marked ‘Output’, are to chain link the signal onto the next component in the system. Therefore, the OBH-11 can be driven from the Tape Output of an amplifier and the second set of sockets can be used to link the signal to the Tape recorder input. There is a 2.1mm DC power jack, with centre positive pin, for connection to a custom Creek OBH type power supply adaptor. On the front panel there is one 1/4" (6.3mm) stereo socket, for plugging in the headphones.

WIRING DIAGRAMS

Player

Option 1

							OBH
OBH -11							Power Supply
							Power Supply

INSTALLATION AND OPERATION

Connect the OBH power supply adaptor to the mains socket. Find a suitable place for the OBH-11 and plug the DC power lead into the rear panel DC jack socket. Connect a pair of high quality interconnect cables from the output of the source to the input sockets on the rear of the OBH-11. Refer to the wiring diagrams showing the different options for connecting the OBH-11 to your system.

Player

OBH -11

OBH

Power Supply

Plug the headphones into the socket on the front panel. Push the On/Off button on the rear to power-up the OBH-11. The small green LED on the front panel will light when it is ready for use. The front panel volume control should be set to the desired signal level.

POWER SUPPLY REQUIREMENTS

In common with all electrical appliances, the OBH-11 needs a power source. The requirements for the OBH-11 is 24 Volts DC at 150 milli Amps current. A custom power supply has been provided to run it, 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 adaptor should be plugged into the mains socket which should be matched for the voltage of the country of use.

N.B. Due to the circuitry charging-up it is normal to hear a small thump through the

Option 2

Amplifier

Player

Amplifier

headphones during switch-on.

Note 1: The OBH should be placed away from transformer hum fields for low noise operation.

Note 2: When new, it is necessary for the OBH to be ‘burned-in’ for at least 24 hours before its full sound quality potential can be realised.

OBH -11

Option 3

OBH

Power Supply

Note 3: Listening to excessive sound pressure levels can seriously damage your hearing. Be careful and enjoy the music.

Tape Deck

OBH-11 Black, OBH-11 specifications

The Creek Audio OBH-11 and OBH-11 Black are compact headphone amplifiers designed for audiophiles seeking to enhance their listening experience with high-quality sound and exceptional performance. Known for their rich audio reproduction, these amplifiers combine advanced technology with user-friendly design to deliver remarkable fidelity.

One of the standout features of the OBH-11 series is its ability to drive a range of headphones, from low-impedance models to high-impedance counterparts, making it versatile for various listening setups. The OBH-11 boasts a powerful output stage, ensuring that even demanding headphones receive ample power for optimal performance. This results in clear sound across the entire frequency spectrum, with impressive detail and dynamics.

The OBH-11 Black takes these capabilities a step further with additional refinements, including upgraded components and improved circuit topology. Creek Audio emphasizes the importance of high-quality parts in their designs, and the OBH-11 Black is no exception, featuring premium capacitors and resistors that contribute to its superior sound clarity. The use of low-noise op-amps enhances signal integrity, allowing for a pristine audio experience.

Both models use a compact, stylish chassis that fits seamlessly into any audio setup. The front panel features a clean and intuitive design, with a volume control knob and a headphone output jack. The OBH-11 Black also includes a switchable gain setting, allowing users to tailor the output to suit their specific headphones, providing even greater flexibility and control over their listening experience.

Connectivity is another area where the OBH-11 and OBH-11 Black excel. They are equipped with line-level RCA inputs, ensuring compatibility with a wide range of audio sources, from CD players to DACs and more. Additionally, the amplifiers' compact size makes them an excellent choice for desktops or portable setups, providing high-quality amplification without taking up much space.

In conclusion, the Creek Audio OBH-11 and OBH-11 Black headphone amplifiers are designed to meet the needs of discerning listeners. With their powerful output, high-quality components, and sleek designs, these amplifiers deliver an enhanced audio experience that meets the demands of both casual listeners and serious audiophiles alike. Whether used at home or on the go, they offer a potent combination of performance and convenience.