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PRESONUS M80 manual

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Table of contents for the manual

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    M80 EIGHT CHANNEL MICROPHONE PRE- AMPLIFIER USERS MANUAL Version 1.0  1998, PreSonus Audio Electronics, Incorporated. All rights reserved.[...]

  • Page 4

    WARRANTY PreSonus Limited Warranty PreSonus Audio Electronics Inc. warrants this product to be free of defects in material and workmanship for a period of one year from the date of original retail purchase . This warranty is enforceable only by the original retail purchaser . To be protected by this warranty, the purchaser must complete and return [...]

  • Page 5

    TABLE OF CONTENTS 3 1 Overview 1.1 Introduction 6 1.2 Features 6 2 Controls & Connections 2.1 Front Panel Basic Layout 8 2.2 Preamplifier Section 12 2.3 Master Channel 14 2.4 Power Supply 16 3 Basic Setup & Operation 3.1 Quick Start 18 3.2 Basic Connections 19 3.3 Basic Operating Procedures 21 4 Technical 4.1 Specifications 24[...]

  • Page 6

    1 OVERVIEW 4 1.1 INTRODUCTION Thank you for purchasing the PreSonus M80 Eight Channel Microphone / Instrument Preamplifier with Mix Bus. This pre-amp was designed using state of the art components to deliver crystal clear audio for an infinite period of time . We believe the M80 to be an exceptional sounding unit and an exceptional value . Feel fre[...]

  • Page 7

    OVERVIEW 5 phase reverse switch allows the operator to avoid phase cancellation when identical microphones are used in close proximity to one another . The phase reverse switch also can compensate for different XLR connector hook-ups where pin connections have been inverted. • A 20 dB pad is available on each channel for reducing the in-coming si[...]

  • Page 8

    CONTROLS & CONNECTIONS 6 environments such as concert halls or clubs or in control rooms monitoring at high volume levels.[...]

  • Page 9

    4 TECHNICAL 7 2.1 FRONT PANEL BASIC LAYOUT Notice that the front panel is divided into eight identical Preamplifier sections plus a Master section. These are the eight microphone preamplifier channels of the M80. Preamp channels contain: • Pan Control[...]

  • Page 10

    CONTROLS & CONNECTIONS 8 • L/R Assign • IDSS Control • Phantom Power Switch • Phase Reverse Switch • -20db Pad • 80 Hz Filter • Gain Control Master Channel contains: • Stereo Output Control • Headphone Level Control 2.2 PREAMPLIFIER SECTION L/R Assign button assigns the signal coming through the channel to the stereo Left/Righ[...]

  • Page 11

    CONTROLS & CONNECTIONS 9 Phantom Power is available to each channel input of the M80 . The 48 volts is supplied by way of the XLR connector for condenser mics and any other devices requiring continuous power through the XLR input . This power is supplied at a constant level allowing use of all eight inputs for condenser mics without any degrada[...]

  • Page 12

    CONTROLS & CONNECTIONS 10 The Stereo Output control adjusts the output level of the Stereo Mix Bus . This potentiometer governs the output level of the Bus. Channels are assigned to the bus via the L/R assign switch on the individual pre-amp channels. Headphone control is located above the 1/4-inch stereo headphone output on the front panel. Th[...]

  • Page 13

    CONTROLS & CONNECTIONS 11 PIN 1 GND PIN 2 High (+) PIN 3 Low (-) Cable Wiring Diagram for Input and Output XLR The Output XLR Connector is servo balanced and operates at +4dBu. The Return / Line In connector of the M80 is provided for use in conjunction with audio process devices such as compressor/ limiters and as a Line In for recording media[...]

  • Page 14

    CONTROLS & CONNECTIONS 12 A pair of XLR connectors are provided for the Left And Right Outputs of the stereo Mix Bus. Signals are assigned to these outputs using the L/R Assign switches on the individual channels. 2.7 Power Supply The Power Jack on your M80 Power Supply accepts a standard IEC cord like those found on most computers and professi[...]

  • Page 15

    3 OPERATION 13 3.1 Dynamic Microphones Dynamic microphones are characterized by lower output levels. Hence, more gain is needed to amplify a dynamic microphone to operating level. Occasionally it is necessary to add the –20dB pad to the microphone to avoid distortion (e.g. when recording percussion). Do not use phantom power when using dynamic mi[...]

  • Page 16

    CONTROLS & CONNECTIONS 14 3.6 Aux Input – Cascading Mixes The Aux Input on the M80 mixes an external audio source in with any other channel assigned to the bus. This provides an opportunity to connect multiple M80’s together thus creating more inputs for the stereo mix bus. Connect the balanced bus outputs of one M80 to the Aux inputs of th[...]

  • Page 17

    4 TECHNICAL 15 M80 Technical Specifications : Number of Channels Eight Dynamic Range >120dB Noise Floor @ Bus -90.2dBu Noise Fl oor @ Main Output -96.4dBu Noise Floor @ Channel Output, +24dB Gain -88.2dBu Headroom +28dBu Frequency Response +/- 0.5dB 10Hz to 60kHz Crosstalk >82dB @ 10kHz Channel Gain, Microphone Input +24dB to +60dB THD + Nois[...]

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    CONTROLS & CONNECTIONS 16[...]