Twin-Servo Specifications
The Jensen Twin-Servo 500 is a faithful recreation of Deane Jensen’s famous 990 microphone preamp in a 500 series format. This unparalleled circuit design includes two cascaded 990 op-amps to share the load and provide 60dB of clean gain, as well as two servos that eliminate signal degrading capacitors from the audio path that allow for less than -120dBu of noise. Oversized Jensen input and output transformers produce an exceptionally wide frequency response and plenty of headroom. Twin-Servo is well-suited for recording highly dynamic sources, with 91dB of dynamic handling. Even more important than the specifications is the sound of the Twin-Servo; exceptionally natural and transparent, with detailed highs and an extended low end that will have you hearing your mics like never before.
| Specifications | ||
|---|---|---|
| Audio circuit type: | Two stage variable gain all discrete using original Deane Jensen circuit with IC DC servo. | |
| Transformer: | Jensen JT-11-EM, JT-16-PCJR | |
| Frequency response: | 14Hz to 85kHz / 8Hz to 100kHz (±1dB / ±3dB) | |
| Dynamic range: | 91dB | |
| Gain: | +60dB | |
| Total harmonic distortion: | 0.004% | |
| Intermodulation Distortion: | 0.004% | |
| Input Impedance: | 1.3kΩ | |
| Output Impedance: | 75Ω | |
| Common Mode Rejection Ratio: | -72dB | |
| Features | ||
| Input pad, 180° polarity reverse, HPF, Phantom Power, OmniPort | ||
| Input Connectors: | XLR | |
| Extras: | OmniPort assigned as unbalanced instrument input | |
| General | ||
| Construction: | 500 Series module | |
| Size (L x W x D): | 5.25" x 1.5" x 7" (134mm x 38mm x 178mm) | |
| Weight: | 1.75lb (0.79 kg) | |
| Shipping size (L x W x D): | 6.75" x 1.875" x 9" ( 171mm x 48mm x 229mm) | |
| Shipping weight: | 2.20lb (0.997 kg) | |
| Power: | 110mA | |
| Conditions: | For use in dry locations only between 5°C and 40°C | |
| Warranty: | Radial 3-year, transferable | |
Frequency Response
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