Lectrosonics LCA16 User Manual download pdf (Page 2)

INTRODUCTION

Thank you for selecting the Lectrosonics LCA16 Logic Controlled Amplifier. The LCA16 is a modular multi-channel

amplifier designed to minimize feedback and audio regeneration problems in conference room sound installations

using distributed speaker systems. The speakers may be wall mounted, ceiling mounted, table mounted or any

combination thereof. For proper operation, the automatic mixer must have logic signal outputs which indicate

individual microphone activity.

The LCA16, in conjunction with an automatic mixer (such as the Lectrosonics Modular Audio Processor system)

controls the gain of each speaker, individually, in response to activity on any of the microphones in the sound

system. Any speaker can be attenuated or turned off completely by the logic output signals from the automatic

mixer channels. In addition, each channel includes a balanced line level output which may be used to drive

external amplifiers.

Each of the 16 output channels in the LCA16 provides 5 Watts into a 4 Ohm speaker (3 Watts into an 8 Ohm

speaker) and a balanced line output. A straight forward switch matrix allows each individual output channel to be

attenuated by any combination of the 16 logic inputs.

The LCA16 has integral power supplies and is designed for mounting in a standard 19-inch equipment rack. Three

front panel LEDs per channel indicate the level of attenuation. The switch matrix and attenuation level controls are

located behind a removable panel to prevent tampering or accidental mis-adjustment.

TABLE OF CONTENTS

INTRODUCTION .......................................... 1

GENERAL TECHNICAL DESCRIPTION .......................... 2

CONTROLS AND FUNCTIONS - FRONT PANEL ................... 3

CONTROLS AND FUNCTIONS - REAR PANEL .................... 5

PRE-CONFIGURING THE LCA16 PRIOR TO INSTALLATION,

16 or FEWER MICS PER LCA16 ............. 6

PRE-CONFIGURING THE LCA16 PRIOR TO INSTALLATION,

MORE THAN 16 MICS PER LCA16 ............ 8

INSTALLATION ........................................... 10

SYSTEM ADJUSTMENT ..................................... 12

SPECIFICATIONS ......................................... 13

SERVICE AND REPAIR ..................................... 14

RETURNING UNITS FOR REPAIR ............................. 14

APPENDIX 1 - POWER LOSS vs CABLE RUN .................... 15

APPENDIX 2 - LCA16 SYSTEM WORKSHEET .................... 16

WARRANTY ........................................ Back cover

1 2 3 4 5 6 7 ... 17 18

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Lectrosonics LCA16 User Manual Page 2