MP101
Microphone Preamplifier
1. INTRODUCTION
The MP101 microphone preamp was designed for use with Ampetronic Induction
Loop drivers, but can be used in other installations as a separate single input pre-
amp. The unit is designed to convert microphones to line-level signals, having a
switchable gain of 40dB or 25 dB
The preamp has an electronically balanced microphone input, with a professional
XLR connector, with switchable Phantom power facility.
Power for the preamp is normally obtained from the host Ampetronic amplifier, but
the unit can be powered from a small, separate power supply, Ampetronic type
PS3.
To meet EMC specifications the power cable and the Line-level signal cable must
not be longer than 3 metres.
2. INSTALLATION
The unit can be installed anywhere as required by the user, and is often hidden
behind the equipment as there are no controls. It can also be installed in a fixed
position on the rear edge of the RM1U rackmount tray.
3. GAIN / PHANTOM SELECTION.
The adjacent drawing indicates where the switches are positioned on the panel.
Normal gain is 25 dB, boost is 40 dB. Phantom voltage is +15 Volt.
4. TECHNICAL SPECIFICATION
Microphone input
Connector: XLR
Channel gain: 25 / 40dB
Input overload: -20dBu
Input noise level: -127dBu 200 Wsource
Input impedance: 5k W
Phantom power: selectable 0V/+15V
Output
Connector: 6.3mm 3-pole jack socket.
Will accept 2-pole plug for single-ended output, or 3-pole plug for single-ended
signal driving a balanced input, using 2-core plus shield cable.
Maximum load:1k W
Max output: + 20dBu
Power requirements
Supply: ±15V regulated at ±12mA excluding phantom power load.
Connections: Pin 1 +15V, Pin 2 -15V, Pin 3 0V.
Case: Srack width, can be installed in RM-1U rackmount.
Dimensions: Width: 74mm Height: 43.5mm Depth: 115mm
Weight: 305g
Warranty Information
DECLARATION OF CONFORMITY
Manufacturer: Ampetronic Ltd.
Address: Northern Road, Newark,
Nottinghamshire, NG24 2ET.
United Kingdom.
Declares that the product:
Description: Microphone Preamplifier
Type Name: MP101
Conforms to the following Directive(s) and Norm(s):
Directive 89/336/EEC
EMC: EN55103-1 (1997)
EN55103-2 (1997)
Safety: EN60065 (1998)
May 2001
L.A. Pieters
Managing Director
Ampetronic Ltd.
This product carries a 5 year parts and labour warranty which could be
invalidated if these instructions are not followed correctly, or if the unit is
tampered with in any way.
The 5 year warranty is dated from the time the equipment leaves Ampetronic
and NOT when it is installed.
MP101 is designed and manufactured in England by Ampetronic Ltd.
MP101
MICROPHONE
PREAMP
POWER OUTPUT MICROPHONE
Gain boost
Phantom
1
2
3
Power
Supply
Connector
Wiring
Details
Pin Function
No.
1 +15 V
2 - 15 V
3 0 V
UP13701-3
Ampetronic Ltd,
Northern Road, Newark,
Nottinghamshire, NG24 2ET
United Kingdom
Tel: +44 (0) 1636 610062 Fax: +44 (0) 1636 610063
