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QSC USA 400

QSC USA 400
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23
USA
Series
FPO
User Manual
Manuel de
l’utilisateur
Bedienhandbuch
Manual del Usuario
USA 400
USA 900
USA 1310
Rev. A
*TD-000061-00*
*TD-000061-00*
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QSC USA 400 Specifications

General IconGeneral
Power Output @ 4 Ohms200 W
RMS Power bridged @ 8 Ohms400 W
Signal-to-Noise Ratio>100 dB
Damping Factor>200
Channels2
Frequency Response20 Hz - 20 kHz
CoolingConvection
Dimensions19" x 3.5" x 12.25" (48.3 cm x 8.9 cm x 31.1 cm)

Summary

Graphical Symbols and Warnings

Risk of Electric Shock Warning

Warning to reduce risk of electric shock, do not open.

Fire and Electric Shock Prevention Warning

Warning to prevent fire or shock, do not expose to rain or moisture.

Operating Voltage and Input Connections

Limiter Functionality

DIP Switch Configuration and Modes

DIP Switch Functions

Explains the 8-position DIP switch for amplifier characteristics.

Parallel Inputs and StereoBridge Modes

Details parallel inputs and stereo/bridge mode configurations.

DIP Switch Settings for Limiter and HPF

Limiter DIP Switch Settings

How DIP switches 3 and 6 enable/disable the limiter for each channel.

High-Pass Filter DIP Switch Settings

How DIP switches 4, 5, 7, 8 control the high-pass filter and cut-off frequency.

Controls and Indicator LEDs

Signal Modes and Output Wiring

Parallel, Stereo, and Bridge Mono Modes

Illustrates signal flow for parallel, stereo, and bridged mono operations.

StereoBridge Mode Selection

Details the switch for selecting stereo or bridged mono operation.

Bridged Mono Operation

Bridged Mono Safety Precautions

Safety warnings for high output voltages in bridged mono mode.

Setting Gain for Bridged Mono

Instructions for setting gain controls for bridged mono operation.

Amplifier Protection Features

Limiter Protection

How the limiter protects against clipping and reduces signal amplitude.

Short Circuit Protection

Describes the Output Averaging™ circuit for short circuit protection.

Thermal Protection

Explains how the amplifier mutes outputs if heatsink temperature exceeds 90° C.

Additional Protection Mechanisms

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