Brand new, unused Creek OBH-21SE headphone amp. I'm not sure why I bought it, because I never use headphones. Well, that's me.Volume potentiometer type:- OBH21 is fitted with a 16mm carbon film pot. OBH21SE is fitted with a 27mm plastic film pot. Amplifier circuitry:- The OBH21 uses 2 x NE 5532. OBH21SE uses 2 x LM 7171. Signal coupling:- OBH-21 is AC coupled using audio grade caps. OBH-21SE is DC coupled and offset voltages are controlled by a custom DC servo circuit.
Input socket type:- OBH-21, Nickel pressed metal. OBH-21SE, Gold pressed metal. Technical Specification Output Power >10mW Suitable Headphone Impedance Range 30 Ohms to 300 Ohms Higher impedance headphones will work but the output level will be reduced proportionally. Frequency Response 10Hz to 50kHz +/- 1dB Total Harmonic Distortion <0.01% @ 1kHz Signal To Noise Ratio >70dB Power Supply Requirement Creek UBH-Uni, (24V DC, 15W) Power Consumption <3Watts in operation,<1 W in standby Weight 3kg
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