With modern amplifiers expected to cater for so many new devices, the Phono capability has frequently been one of the features to disappear. Creek Audio has always been aware of the benefits of vinyl – that is why the company continues to provide a number of Phono stage options.
The OBH-15 Phono pre-amp can now drive longer cables, due to its low output impedance. It has combined the high quality discrete semiconductor circuitry of the OBH-8 and OBH-9 input and gain stages, and added improved open loop gain by cascoding them, prior to the selector switch and combined passive RIAA circuit. Separate Burr-Brown professional grade low-noise op-amps are used for each channel, to buffer the output signal and provide a very low impedance drive to any pre-amp or integrated amplifier. The OBH-15 can switch from moving magnet to moving coil cartridges, via a simple push button on the rear panel. As it has two input circuits, optimised for each type of cartridge it allows for the connection of two turntables. A high gain MC version, for low output MC cartridges, is available to order.
The OBH-15 has a built-in high performance power supply regulator circuit which makes it immune from power supply fluctuations so, it can be used with the OBH-Uni power supply.
Internally, the OBH-15 has built to the highest standards using a glass-fibre double sided, plated through hole PCB and very high-grade components. The OBH-15 looks the part too! Designed to complement the Creek range of amplifiers, tuners and CD players, the new OBH range features an impressive 4mm thick solid aluminium front panel in a silver finish. The remainder of the 150mm deep extruded aluminium case is painted black, so the product all but disappears.
|Gain||MM 37 dB|
|Frequency Response||20 Hz to 20 kHz +/- 0.25 dB|
|Signal to Noise Ratio||MM - 83 dB|
MC - 75 dB
|Total Harmonic Distortion||MM < 0.03%|
MC < 0.05%
|R1AA deviation||+/- 0.5%|
|Output Impedance||100 Ohm|
|Input Sensitivity / Impedance||MM 3.5 mV / 47K Ohm / 220pF|
MC 0.5 mV / 1000 Ohm / 3300 pF
|Overload Margin||MM 22 dB|
MC 20 dB
|Mates well with cartridges||MM|
2.5 mV - 5 mV output
0.5 mV - 1 mV output
|Power supply voltage||24V DC / 30 mA|
|Size L/W/H||150 x 100 x 66mm|