Jensen Twin-Servo 500 series User Manual

www.radialeng.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: [phone] • Fax: [phone] • Email: [e-mail]

Radial® Jensen Twin-Servo 500™ User Guide

Table of Contents Page

Feature Set .................................................................... 1

Overview ........................................................................ 2

Making Connections ....................................................... 3

The Control Panel .......................................................... 4

Ground Lift and Omniport ............................................... 5

Applications .................................................................... 6

Block Diagram ................................................................ 7

Specications ................................................................. 8

Warranty ............................................................Back cover

Thank you for purchasing the Jensen Twin-Servo 500™

series mic preamp. We are condent that as you become

familiar with and gain experience using this device, you will

quickly nd that it is an exceptional sounding preamp for

any application.

Although the Twin-Servo 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 nd 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 light on various subjects. If
afterwards you still do not nd the appropriate answer, feel
free to send us an email and we will do our very best to

answer in short order.

Now get ready to plug into what may well be the most
transparent and detailed sounding mic preamplier you

have ever heard.

Radial Engineering Ltd.

Jensen Twin-Servo 500™ Module

True to the Music

®

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FEATURE SET

1. 10 SEGMENT METER: Custom designed cir-

cuit for greater VU meter accuracy.

2. GAIN CONTROL: Dual gang pot simultane­ously controls the dual 990 op-amp topology
for optimal gain at all settings.

3. 180°: Reverses pins-2 and 3 at the output to
help phase align microphones when two chan­nels are in stereo use.

4. HIGH PASS FILTER (HPF): Gentle high-pass

lter may be inserted into the signal path to

reduce excessive low frequency content and
control resonance.

5. PAD: Reduces the input sensitivity by -15dB
when amplifying 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

audio signal path without any tone shifting ca­pacitors.

10. JENSEN OUTPUT TRANSFORMER: The JT-

11-EM is linear from 2Hz~200kHz with less
than 0.001% distortion at 20Hz.

11. GROUND LIFT: Set and forget rear panel

ground switch lifts the pin-1 ground at the XLR

input.

12. JENSEN MIC INPUT TRANSFORMER: The

JT-16-PCJR is exceptionally quiet and linear
from 5Hz~50kHz with less than 0.06% distor­tion at 20Hz.

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