Rane MS1B User Manual

DATA SHEET

General Description

The Rane MS 1b Mic Stage pream­plifier provides the answer when you
need just one microphone input in an
otherwise line-level world. Give us a
call to go from either a dynamic,
condenser or electret microphone to a
line-level input with a minimum of
noise, distortion, cost and hassle.

The MS 1b provides 48 V switch­able Phantom Power with indicator
LED, continuous rotary Gain trim
between 18 dB and 66 dB, Signal/
Overload LED, and XLR balanced Input
& Output connectors. A Polarity switch
and high-current cross-coupled output
line driver round out the features.

The MS 1b utilizes one of the finest
ultra low noise amplifier designs
available. Featuring a true differential
input with high common-mode rejec­tion, use of the MS 1b guarantees
performance usually found only in
mixing consoles costing thousands of
times as much. Of course, for all of that
extra money you receive a proportional
increase in KPSI (knobs per square
inch).

2

486

GAIN

5.097"

MAXMIN

SIG/OL 48V PHANTOM

MS 1b

MICROPHONE STAGE

MS 1b

MIC

ON

STAGE

POWER

0.15"

1.636"

0.775"

2.50"

4.225"

Features

• 120 dB dynamic range

• Gain Control

• Signal / Overload Indicator

• Polarity Switch

POWER

220mA

CLASS 2 EQUIPMENT

.7"

5.805"

MS 1b

MADE IN U.S.A.

RANE CORP.

N108

NORMAL

POLARITY

INVERT

MIC INLINE OUT

• Switchable 48 V Phantom Power

• True differential Input

• Cross-coupled line driver

• UL/CSA/CE and 100/120/230 VAC remote power supply

0.35"

Data Sheet-1

MS 1b

MICROPHONE STAGE

Features and Specifications

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Data Sheet-2

Block Diagram

+48 V

MS 1b

MICROPHONE STAGE

PHANTOM

POWER

SIGNAL / OVERLOAD

R

MIC
INPUT

2

1

3

RFI

FILTER

GAIN

12-60 dB

Application Information

Uses and applications for the MS 1b should be obvious.
But then again, it’s obvious to us our taxes are too high and
nothing is being done about that. With this in mind, perhaps a
few words on using the MS 1b might not be wasted.

BALANCED USE

The MS 1b provides a true cross-coupled balanced output.
This is equivalent to an electronic simulation of a transformer
output. Rane follows the AES standard of pin 2 = hot.

When running a long cable back to the mixer, run a line-
level balanced line rather than a mic-level line. The compact
MS 1b can mount closer to the microphone, provide a local
volume control (or not, just pull the knob off), while the
stronger signal minimizes RF and hum irritations.

UNBALANCED USE

Balanced use is recommended to minimize noise. When
you must drive an unbalanced device with the MS 1b's
balanced output, connect pin 2 to the “+” or “hot” lead, and
tie pin 3 and ground together at the shield.

R

G

INVERT

+6 dB

LINE

LEVEL

2

OUT

1

3

MIXING

The MS 1b is designed to fill the need for adding a
microphone channel to line-level mixers, such as the Rane
SM 26B or SM 82. Many installations using either of these
products invariably wind up with one unused input that would
do the job perfectly if only it could operate at mic-level. In
rides the MS 1b to the rescue.

DIGITAL RECORDING AND SAMPLING

Another handy use for the MS 1b is in recording applica­tions. Many popular products do not have a high enough
quality mic preamp to suit the resolution of the digital
processing electronics. Such irony. Using the ultra low noise
MS 1b to bring the mic inputs up to extremely high quality
line-level is an easy and affordable solution for this dilemma.
No garbage in; no garbage out. Clippity-clop; clippity-clop.

MICROPHONE TYPES

The available gain and large input range of the MS 1b
allows the use of virtually any type of microphone. True 48V
phantom power guarantees the MS 1b works with every
microphone. The better the mic, the better the MS 1b sounds.

Ah, the sound of the thundering hoofs is deafening.

Data Sheet-3

MS 1b

MICROPHONE STAGE

Architectural Specifications

The microphone preamplifier shall be a single channel
stand-alone unit with remote power supply. The power supply
shall be U.L. listed, C.S.A. certified, and CE certified. The
input and output shall be fitted with XLR connectors. A
polarity inverting switch shall be included. Phantom power
shall be provided in compliance with IEC 60268-15 and be
controlled by a slide switch with an LED indicator. A gain
control shall be provided with 18-66 dB adjustment range.
Power, system signal and overload indicators shall be
provided. High current cross-coupled active output line driver
shall be standard, as well as input RFI filter protection.

The unit shall be a Rane MS 1b Microphone Stage.

CHASSIS GROUNDING

Units with outboard power supplies do not ground the
chassis through the line cord. Make sure that these units
are grounded either to another chassis which is earth
grounded, or directly to the grounding screw on an AC
outlet cover by means of a wire connected to a screw on
the chassis with a star washer to guarantee proper contact.

Please refer to RaneNote, “Sound System Interconnec­tion” (supplied in your manual and available on request
separately) for further information on system grounding.

©Rane Corporation 10802 47th Ave. W., Mukilteo WA 98275-5098 TEL [phone] FAX [phone] WEB http://www.rane.com

Data Sheet-4

All features & specifications subject to change without notice. DOC 104514 PN 11801