With modern amplifiers expected to cater for so many new source
devices, the Phono capability, once very common, is one of those
built-in features that has disappeared in recent times. The engineering
team at Creek Audio has always loved the benefits of vinyl records and
continues to work on technical and sonic improvements to its range of
Phono amp options, be it the stand-alone OBH or Wyndsor or plug-in
Sequel types. Tasked with designing a replacement for the long running
OBH-15, the team came up with some valuable improvements and additional
features; surprisingly they made them all fit into the original
OBH-sized casework.
The OBH-15 mk2 has a completely new circuit design, with a discrete
transistor MC and integrated circuit MM stage. Unlike its predecessor,
the new amp has multiple gain settings and matching capabilities for
capacitance and resistance. The signal required by most modern
amplifiers is described as being ‘LINE' level which is, in technical
terms, between 200 and 500 milli-Volts sensitivity with a flat frequency
response. Unless your amplifier has a specific ‘Phono' or Disc input,
the level will be too low to play vinyl and the frequency response will
be wrong.
Technical Specification
| THD+noise at 2Vrms output: |
MM (40dB gain) @ 1kHz = 0.002%MM (40dB gain) @ 10kHz = 0.003%MM
(50dB gain) @ 1kHz = 0.007%MM (50dB gain) @ 10kHz = 0.007%MC (60dB gain)
@ 1kHz = 0.005%MC (60dB gain) @ 10kHz = 0.005%MC (70dB gain) @ 1kHz =
0.011%MC (70dB gain) @ 10kHz = 0.012% |
| Channel Separation |
MM (all gains) 1kHz = >70dBMC (all gains) 1kHz = >70dB |
| Frequency Response |
0.5Hz – 100kHz (+/-0.5dB) |
| SNR |
MM (40/50dB gain) = 76/66dB
MC (60/70dB gain) = 77/70dB |
| Overload Margin |
MM (all gains)
21.7dB@50Hz – 21.7dB@1kHz – 21.7dB@20kHz
MC (all gains)
20.7dB@50Hz – 20.7dB@1kHz – 20.7dB@20kHz |
| Output level |
6.1V rms Maximum |
| Output Impedance |
100 Ohms |
| Gain |
MM = 40dB/50dBMC = 60dB/70dB/80dB |
| Matching |
MM = 100pF or 200pF plus 47k OhmsMc = 100pF or 1100pF plus 100 Ohms or 510 Ohms |
| Size |
100 x 63 x 150mm WxHxD |
| Weight |
1.0 kgs inc OBH-Uni power adapter |
| Power consumption |
3 Watts |
| Mains voltages |
100V to 250V AC 50/60Hz |
| Mains Connection |
A clip-on plug is supplied for UK,North America, Europe and Australasia |
| Finish Colours |
Black or Silver Front Panel |
For more information, please visit this product's webpage.
