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User Manual for Radial Engineering Jensen Twin-Servo 500 Series Mic Preamp Click to enlarge the picture
Contents of the user manual for the Radial Engineering Jensen Twin-Servo 500 Series
- Product category: Microphone Preamps Radial Engineering
- Brand: Radial Engineering
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Radial Engineering Microphone Preamps
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User manual for the Radial Engineering Jensen Twin-Servo 500 Series contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Radial Engineering product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Radial Engineering user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Radial Engineering product will considerably shorten its lifespan!
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Product description The Radial Engineering Jensen Twin-Servo 500 Series Mic Preamp is a faithful recreation of Deane Jensen's original Twin-Servo 990 mic pre, regarded by many audio professionals as one of the finest preamps ever made. This mic preamp has pedigree. The circuit designed by the Jensen engineering team includes two cascaded 990 op-amps to share the load and provide 60 dB of clean gain. The two servos eliminate the need for signal-degrading capacitors in the audio path and allow for less than -120 dBu of noise. Engineered for superior sound quality, the two oversized input and output Jensen transformers are a crucial part of the design. They contribute to lowering the noise floor and freeing the signal from hum and RF interference, while producing an extended frequency response and plenty of headroom. Augmented by a 180º polarity-reverse switch, a -15 dB pad, and a high-pass filter that eliminates excessive low-end, the Twin-Servo opens musical tone-shaping possibilities. Other features include a dual-gang potentiometer for optimal gain, a 10-segment LED meter that gives instant visual feedback for the input signal and a 48V phantom power-activation switch to power condenser microphones. The front-panel Neutrik combo connector offers the choice of XLR microphone input and standard hi-Z 1/4" instrument input. Re-imagined for today, this adaptation of the Jensen Twin-Servo fits the popular 500 series format. - Jensen Mic Input Transformer
- The JT-16-PCJR is exceptionally quiet and linear from 5 Hz to 50 kHz with less than 0.06% distortion at 20 Hz
- Jensen Dual Op-Amps
- 100% discrete audio signal path without any tone-shifting capacitors
- Jensen Output Transformer
- The JT-11-EM is linear from 2 Hz to 200 kHz with less than 0.001% distortion at 20 Hz
- 180° Polarity-Reverse Switch
- Reverses pins 2 and 3 at the output to help phase-align microphones when two channels are in stereo use
- 10-Segment Meter
- 10-Segment Peak Indicator with Hold. Custom-designed circuit for greater VU accuracy
- Dual-Gang Pot
- Simultaneously controls the dual-990 op-amp topology for optimal gain at all levels
- High-Pass Filter
- Gentle high-pass filter may be inserted into the signal path to reduce excessive low-frequency content and control resonance
- Pad
- Reduces the input sensitivity by -15 dB when amplifying exceedingly high output sources
- 48V
- Activates the 48V phantom power supply for use with condenser microphones and active direct boxes
- Combo Input
- Combination balanced XLR mic input and 1/4" instrument input is mounted on front panel for ease of use
- Ground Lift Switch
- Set-and-forget rear-panel ground switch lifts the pin-1 ground at the XLR input
- Omniport
- Available when used with the Radial Workhorse, the Omniport accesses a hi-Z instrument input
- Full Enclosure
- 100% encased steel casing reduces magnetic interference from nearby modules that may cause noise pollution
UPC: 676101044238 In the Box Radial Engineering Jensen Twin-Servo 500 Series Mic Preamp 3-Year Limited Warranty Table of Contents
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Technical parametersRadial Engineering R700 0111 Specs | Circuit Type | Two-stage variable gain, all discrete using original Deane Jensen circuit with IC DC servo
Jensen transformer-coupled input and output | | Microphone Input | Transformer-coupled, Jensen JT-15KE | | Polarity Reverse | 180° | | Frequency Response | 14 Hz to 85 kHz / 8 Hz to 100 kHz (±1 dB / ±3 dB) | | Pad | -15 dB | | XLR Configuration | AES spec: pin-1 ground, pin-2 (+), pin-3 (-) | | Intermodulation Distortion | 0.004% | | Dynamic Range | 91 dB | | Input Impedance | XLR Input: 1.3 kOhm
Instrument Input: 220 kOhms / unbalanced | | Output Impedance | 75 Ohms | | Maximum Output | +22 dBu | | Mic Pre Gain | +60 dB | | Common Mode Rejection | -72 dB | | Equivalent Input Noise | -120 dBu @ maximum gain | | Total Harmonic Distortion (THD) + N | 0.004% | | Phantom Power | 48 VDC - 10 mA (as supplied by 500 frame) | | High Pass Filter | 6 dB/octave, @ 150 Hz | | Form Factor | 500 Series module | | Power | 110 mA | | Environmental Conditions | For use in dry locations only between 5°C and 40°C (41°F and 104°F) | | Dimensions (H x W x D) | 5.25 x 1.5 x 7" (134 x 38 x 178 mm) | | Weight | 1.75 lb (0.79 kg) | | | | Package Weight | 2.25 lb | | Box Dimensions (LxWxH) | 8.976 x 6.614 x 1.89" |
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