Creek Audio OBH-8mk2 Moving Magnet Phono Preamplifier


Creek Audio

The OBH-8mk2 has a completely new circuit design, utilising an integrated circuit MM stage.



The OBH-8mk2 is small device designed to boost the signal level by 40dB (x100) and change the frequency response to provide the most accurate reproduction of the recording.
The OBH-8mk2 is now produced in a smaller metal case to complement the Creek Evolution full sized range.

To enhance the performance, the power supply is split into a negative and positive voltage by a custom Creek discrete circuit. Two capacitance multipliers further filter the power supply, before they power the pre-amp circuitry, to reduce any unwanted ripple to virtually nothing. To reduce distortion Creek has also fitted constant current sources to the output of the gain stage, pushing it into Class A. This combined with a low output impedance make it suitable for driving long cables with ease.

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 Creek’s OBH-15mk2 and OBH-8mk2 Phono Pre-amps, which have high-gain and are therefore more demanding of power supply purity. It is over-rated and can provide 4 times more power than is required to power a Phono pre-amp.
Strict international regulations make it unacceptable to use conventional linear power adapters because, if they are left permanently switched-on, their standby power will exceed the 0.1W limit. The latest OBH-Uni draws less than 0.1W when idle, or plugged-in but not used. It is also silent in operation, from zero to maximum current consumption.


THD+NOISE AT 2VRMS OUTPUT: (40dB gain) @ 1kHz to 10kHz = <0.003% CHANNEL SEPARATION: >70dB
FREQUENCY RESPONSE: 10Hz – 100kHz (+/-0.5dB)
SNR: >76dB
OUTPUT IMPEDANCE: <100 Ohms GAIN: 40dB fixed
MATCHING: Resistance = 47k Ohms. Capacitance = 220pF
SIZE: 100x48x80mm WxHxD
WEIGHT: 0.4 kgs inc OBH-Uni power adapter
MAINS VOLTAGES: 100V to 250V AC 50/60Hz
MAINS CONNECTION: A clip-on plug is supplied for UK, North America and Europe


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