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Radial Engineering Ltd.

Jensen Twin-Servo 500

 Module

True to the Music

®

5

Ground lift

There is a hidden ground lift switch (mini slider) that lets 

you lift the ground on the front and rear XLR inputs. As the 

Twin-Servo is equipped with an input transformer, you will 

likely  never  need  to  lift  the  ground. This  should  be  set  in 

the upward position. However, a unique situation could arise 

where you may incur noise. To lift the ground, you have to 

pull the module from your power rack and then move the 

slider downwards towards the 15-pin card edge connector. 

The ground lift switch does not affect the ¼” guitar input 

portion of the Combo jack or the output side of the Twin-

Servo. note that when the ground is lifted, the Twin-Servo 

will no longer pass 48V phantom power to your microphone.

Hi-Z input and omniport™

The Twin-Servo has two instrument input options. The 

immediately obvious one is on the front panel - as part of the 

Neutrik Combo connector. Note that this is a standard hi-Z 

¼” instrument input and using a 1/4” TRS connector is not 

recommended. The second is via the Omniport™ for those 

that are equipped with a Radial 500 series power rack. Both 

are  connected  in  parallel  but  as  soon  as  you  engage  the 

front panel jack, it will automatically switch the rear panel 

¼” input off. 

Switch Located Here

  warNiNG NoTiCe To uSer!

Although preventative safety measures have been designed into Radial 500 series 

products 

we strictly advise against hot-swapping modules

 or plugging and 

unplugging them when the Workhorse or other 500 series rack are powered on. Hot 

swapping can cause connection sparks at the card-edge connector that could send 

damaging transients to other equipment. This also greatly reduces the life span of the 

contacts. Damage due to hot swapping is not covered under warranty.  There are no 

user serviceable parts inside.

+

INPUT

OMNIPORT

FEED

LINK

1

2

3

4

5

6

OUTPUT

INPUT

7

8

SUMMING  MIXER INPUTS 1 ~ 8

INPUT

FEED

LINK

INPUT

FEED

LINK

INPUT

FEED

LINK

INPUT

FEED

INPUT

FEED

INPUT

FEED

INPUT

OUTPUT

LEFT

WORKHORSE RACK & MIXER

RIGHT

LEFT

RIGHT

EXPANSION

BUSS

GROUND

CHASSIS

CIRCUIT

DIRECT OUT 1 ~ 8

INPUTS 1 ~ 8

OFF

OFF

CARD SLOT 1

CARD SLOT 3

CARD SLOT 5

CARD SLOT 7

CARD SLOT 2

CARD SLOT 4

CARD SLOT 6

CARD SLOT 8

OMNIPORT

OMNIPORT

OMNIPORT

OMNIPORT

OMNIPORT

OMNIPORT

OMNIPORT

Made  in Canada

Radial Engineering Ltd. 

1/4” TRS -  TIP SEND / RING RETURN

INSERT

INSERT

MAIN

OUT

MON

OUT

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

INPUT

OUTPUT

INPUT

OUTPUT

INPUT

OUTPUT

INPUT

OUTPUT

INPUT

OUTPUT

INPUT

OUTPUT

INPUT

PIN DIAGRAM - PANEL VIEW

1

-

+

G

-

+

G

2

3

-

+

G

-

+

G

4

5

-

G

6

7

8

13

IN

OUT

LEFT

RIGHT

IN

OUT

SPLIT VOLTAGE POWER SUPPLY

+18VDC

COM

+48VDC

+18VDC

COM

POWER SUPPLY

ON

ON

MONO

2

3

4

1

LEVEL

CLI

P

PAN

Made  in  Canada

LEVEL

ON

6

7

8

5

LEVEL

MAIN

MON

48V PHANTOM

+16V / -16V

LEVEL

CLI

P

PAN

ON

LEVEL

CLI

P

PAN

ON

LEVEL

CLI

P

PAN

PAN

PAN

PAN

PAN

ON

LEVEL

CLI

P

LEVEL

ON

LEVEL

CLI

P

ON

LEVEL

CLI

P

ON

LEVEL

CLI

P

ON

REAR PAnEL InPUT

(WORkHORSE)

Содержание Twin-Servo 500 series

Страница 1: ...com True to the Music User Guide Jensen Twin Servo 500 500 Series Module Radial Engineering Ltd 1588 Kebet Way Port Coquitlam British Columbia Canada V3C 5M5 Tel 604 942 1001 Fax 604 942 1010 Email info radialeng com ...

Страница 2: ......

Страница 3: ... has been designed to be super easy to use we urge you to take a few minutes to read the manual to ensure you gain familiarity with all of the features and functions that make it unique If after you have done so you find yourself looking for extra details please visit the Twin Servo FAQ page on the Radial web site This is where we post updates and answer questions from other users that can shed li...

Страница 4: ...fying exceedingly high output sources 6 48V Activates the 48V phantom power supply for use with condenser microphones and ac tive direct boxes 7 COMBO Input Combination balanced XLR mic input and 1 4 instrument input is mounted on front panel for ease of use 8 OMNIPORT Available when used with the Radial Workhorse the Omniport accesses a hi Z instrument input 9 JENSEN DUAL 990 OPAMPS 100 discrete ...

Страница 5: ...citors and two industry leading Jensen transformers The Twin Servo 500 has been meticulously designed to reproduce Deane Jensen s original Twin Servo 990 mic pre regarded by many audio professionals as the finest preamp ever made The dual JE 990 op amps allow for maximum efficiency and lowest noise at all signal levels while the servos eliminate the need for signal degrading capacitors in the audi...

Страница 6: ... the Twin Servo module into place ensuring you align the card edge with the 15 pin receptacle If you have a newer Radial Workhorse the nylon guides make this easy The Twin Servo comes with a pair of handy ThumbSet thumb screws These should be hand tightened to secure the module in place before use Your power rack will likely be equipped with XLR inputs and outputs for each strip Connect your micro...

Страница 7: ...Twin Servo actually measures down to 5Hz With so much bass you will hear low end like never before The downside is that with so much bass to work with it may be excessive particularly when recording several acoustic instruments together The solution reduce the resonance and excessive bass by engaging the high pass filter This is one of the most practical features on the Twin Servo When engaged it ...

Страница 8: ...ING NOTICE TO USER Although preventative safety measures have been designed into Radial 500 series products we strictly advise against hot swapping modules or plugging and unplugging them when the Workhorse or other 500 series rack are powered on Hot swapping can cause connection sparks at the card edge connector that could send damaging transients to other equipment This also greatly reduces the ...

Страница 9: ... as bleed from other instruments can be eliminated Connect a piezo transducer to the Radial PZ DI and send this to the Twin Servo for amazing bottom end Using the Twin Servo with a ribbon mic Most modern ribbon microphones have plenty of output and can connect directly to the Twin Servo s low noise circuitry When using old vintage mics add the Radial McBoost to increase the output by up to 25dB fo...

Страница 10: ...Radial Engineering Ltd Jensen Twin Servo 500 Module True to the Music Block Diagram Subject to change without notice 7 ...

Страница 11: ...Rejection CMRR 72dB Equivalent Input Noise EIN 120dbu maximum gain Dynamic Range 91dB Total Harmonic Distortion THD N 0 004 Intermodulation Distortion 0 004 Instrument Input Input Impedance Instrument 220kΩ unbalanced Instrument Preamp Gain 60dB unbalanced Control Panel Meter 10 segment peak indicator with hold Polarity Reverse 180º Pad 15dB High Pass Filter 6dB octave 3dB 150Hz Phantom Power 48VD...

Страница 12: ...modification by any other than an authorized Radial repair centre THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DESCRIBEDABOVE NO WARRANTIES WHETHER EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL EXTEND BEYOND THE RESPECTIVE WARRANTY PERIOD DESCRIBED ABOVE OF THREE YEARS RADIAL SHALL ...

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