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QES Labs SMP-2 Owner's Manual

Stereo microphone preamplifier
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SMP-2
Stereo Microphone Preamplifier
Owner's Manual
Rev. 1

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Summary of Contents for QES Labs SMP-2

  • Page 1 SMP-2 Stereo Microphone Preamplifier Owner’s Manual Rev. 1...
  • Page 2 INTRODUCTION THANK YOU!... for choosing the SMP-2 Twin Channel Microphone Preamplifier. This Microphone Preamplifiers use the best available parts with the shortest, cleanest, signal path possible. The Preamplifier features an all-tube circuit in the audio path, ZERO negative feedback, and Mosfet based high-stability “shunt” (parallel) voltage regulation stage, that has proved to be among the finest amplification circuits for demanding audio professionals.

  • Page 3: Mains Connections

    GENERAL NOTES LOCATION & VENTILATION The SMP-2 Microphone Preamplifier must be installed in a stable location with ample ventilation. It is recommended, if this unit is rack mounted, that you allow enough clearance on the top and bottom of the preamp such that a constant flow of air can flow through the ventilation holes.
  • Page 4 Connect the umbilical cable from the external PSU to the main unit following this scheme: On front of PSU, connect the RED shrink cable MALE connector to the RED dotted front panel female connector, and the other cable connector to the adjacent panel connector, like in the picture below: Then connect the umbilical cable’s RED shrink female connector to the main unit’s MALE panel connector with the arrow symbol, then the adjacent connector on cable...

  • Page 5: Audio Connections

    Gently lock all mating connectors on both PSU and main unit. When you are sure that all the cables are connected and secured to the respective devices, you can turn on the unit. AUDIO CONNECTIONS The microphone cables should be connected to the FEMALE XLR connectors on the rear panel of the unit, following the polarity as in the pic below: The output MALE connectors follow the same pin out: 1 –...

  • Page 6: Operation

    OPERATION SWITCHING ON Allow this unit a few minutes for the tubes to warm up before use. It is not recommended that you leave your preamplifier permanently switched on. This only wastes electricity and tube life. Your preamplifier has solid state rectification and will reach peak operating condition in approximately 30 minutes.

  • Page 7: Rear Panel

    REAR PANEL FUSE HOLDER In case, replace with “Slow-Blow” (time lag) 5x20mm cartridge fuses, with the following ratings based on your mains voltage. 100-120V - 4AT 220-240V - 2AT SPECIFICATIONS Vacuum tubes (per channel): 2x 12BZ7, 2x 6414 20Hz – 20kHz (±1dB) Frequency response: Signal to Noise ratio: 96dB or better,...

  • Page 8: Warranty

    In no event will QES Labs be liable for lost profits or any other incidental, consequential or exemplary damages, even if QES Labs is aware of the possibility of such damages.

  • Page 9: Declaration Of Conformity

    DECLARATION OF CONFORMITY I declare that the model “SMP-2” conforms to the following standards adopted by the European Community: EMC (electro magnetic compatibility) 89/336/CEE directive, LV (low voltage equipment) 73/23/CEE directive on electrical safety (EN61010) and electromagnetic compatibility (EN61000). RoHS (Restriction of Hazardous Substances) 2002/95/CEE directive.

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