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QSC ISA 300T User Manual

QSC ISA 300T
40 pages
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User Manual
ISA Audio Power Amplifiers
ISA Series
Installed
Sound
Amplifiers
TD-000093-00 rev.C
*TD-000093-00*
n ISA 300T
n ISA 500T
n ISA 800T
n ISA 280
n ISA 450
n ISA 750
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QSC ISA 300T Specifications

General IconGeneral
TypePower Amplifier
Channels2
8 Ohm Stereo300 W
8 Ohm Bridged900 W
THD< 0.05%
Signal to Noise Ratio> 100 dB
Voltage Gain32 dB
Total Harmonic Distortion< 0.05%
Rack Units2U
Frequency Response20 Hz - 20 kHz
Input Impedance20kΩ balanced, 10kΩ unbalanced
CoolingConvection
Dimensions19" x 3.5" x 15.5"
Power Requirements100-240 VAC
Weight (kg)10

Summary

IMPORTANT SAFETY PRECAUTIONS & EXPLANATION OF SYMBOLS

GENERAL SAFETY WARNINGS

Summarizes critical safety warnings regarding electric shock, rain, and moisture.

EXPLANATION OF SYMBOLS

Details the meaning of warning symbols like lightning flash and exclamation point.

FCC INTERFERENCE STATEMENT

Provides the FCC compliance statement for the device.

INTRODUCTION

FRONT PANEL

Describes the front panel controls and indicators of the ISA amplifiers.

REAR PANEL ILLUSTRATIONS

Illustrates and labels the rear panel components for different ISA models.

FEATURES & SETUP

POWER SWITCH

Explains how to operate the front panel power switch and related LED behavior.

COOLING AIR INLET AND EXHAUST VENTS

Details the importance of keeping air vents clear for proper cooling.

LED INDICATORS

Explains the meaning and behavior of POWER, SIGNAL, and CLIP LEDs.

GAIN CONTROLS

Details the location and operation of the rear panel gain controls.

DATAPORT V2

Explains the function and use of the DataPort V2 connector.

STEREO & PARALLEL OPERATING MODES

How to configure and use Stereo and Parallel operating modes.

STEREO & PARALLEL MODE DIP SWITCH SETTINGS

Details DIP switch configurations for Stereo and Parallel modes.

BRIDGE OPERATING MODE & DIP SWITCH SETTINGS

Explains Bridge mode operation and its DIP switch settings.

LOW FREQUENCY FILTER & DIP SWITCH SETTINGS

Details the low frequency filter and its DIP switch configurations.

FREQUENCY RESPONSE CURVES

Displays frequency response graphs for various amplifier models.

CLIP LIMITER & DIP SWITCH SETTINGS

Explains the clip limiter and its DIP switch settings.

INSTALLATION

RACK MOUNTING AND MOUNTING DIMENSIONS

Provides instructions and dimensions for rack mounting the amplifier.

COOLING REQUIREMENTS & AC MAINS

Details cooling needs and how to connect AC power.

CONNECTIONS

INPUTS- XLR & TERMINAL BLOCK

Explains how to connect using XLR and terminal block inputs.

INPUTS- DATAPORT V2

Details connecting inputs via the DataPort V2 connector.

OUTPUTS- USING THE SCREW TERMINAL CONNECTIONS

Instructions for using the screw terminal output connections.

OUTPUTS- DIRECT LOW IMPEDANCE (LO-Z)

Details connecting low impedance (2-16 ohm) loads to outputs.

OUTPUTS- DISTRIBUTED HIGH IMPEDANCE (HI-Z), STEREO & PARALLEL

How to connect Hi-Z loads in 25V, 70V, 100V for Stereo/Parallel modes.

OUTPUTS- DISTRIBUTED HIGH IMPEDANCE (HI-Z), BRIDGE MODE

Connecting Hi-Z loads in 140V and 200V for Bridge mode.

POWER SHARING BETWEEN HIGH & LOW IMPEDANCE OUTPUTS

Guidelines for sharing power between Hi-Z and Lo-Z outputs on "T" models.

SECURING OUTPUT WIRING TO CHASSIS

Instructions for securing output wiring to the chassis for reliability.

OPERATION

APPLICATIONS

GENERAL APPLICATION INFORMATION

Provides general application information and principles for ISA amplifiers.

Distributed Line Principles (“T” models only)

Explains principles of distributed line audio systems for "T" models.

LOW FREQUENCY FILTERING & DISTRIBUTED OUTPUTS

Details LPF for 70-100V systems and distributed output examples.

DISTRIBUTED OUTPUTS

Shows examples of 70V and 100V distributed output configurations.

MULTIPLE LOW IMPEDANCE LOADS IN SERIES

Explains how to connect multiple low impedance loads in series.

MULTIPLE LOW IMPEDANCE LOADS IN PARALLEL

Explains how to connect multiple low impedance loads in parallel.

DataPort V2 Compatible Products

Lists QSC DataPort-compatible products that interface with ISA amplifiers.

TROUBLESHOOTING

NO SOUND

Provides solutions for problems where the amplifier produces no sound.

DISTORTION, NO CHANNEL SEPARATION, HUM, HISS, FEEDBACK

Addresses common audio problems like distortion, hum, hiss, and feedback.

SPECIFICATIONS

AMPLIFIER PROTECTION, COOLING, AND INDICATORS

Details amplifier protection features, cooling methods, and front panel indicators.

CONNECTORS, LOAD PROTECTION, AND CIRCUIT TYPE

Outlines connector types, load protection, and output circuit types.

POWER REQUIREMENTS AND CONTROLS

Details power consumption figures and control interfaces.

DIMENSIONS AND WEIGHT

Lists the physical dimensions and weight of the amplifiers.

OUTPUT POWER AND IMPEDANCE

Lists output power ratings and impedance details for all models.

PERFORMANCE SPECIFICATIONS

Details dynamic headroom, distortion, frequency response, and SNR.

DETAILED CURRENT CONSUMPTION

Provides specific current consumption figures for various operating levels.

WARRANTY INFORMATION

HOW TO CONTACT QSC AUDIO PRODUCTS

Provides QSC's mailing address, phone numbers, and web contact info.

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