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ISA 300T
ISA 500T
ISA 800T
ISA Series
ISA 280
Installed
ISA 450
Sound
ISA 750
Amplifiers
User Manual
ISA Audio Power Amplifiers
*TD-000093-00*
TD-000093-00 rev.C
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IMPORTANT SAFETY PRECAUTIONS & EXPLANATION OF SYMBOLS CAUTION: TO REDUCE THE RISK OF ELECTRIC CAUTION SHOCK, DO NOT REMOVE THE COVER. NO USER- RISK OF ELECTRIC SHOCK SERVICEABLE PARTS INSIDE. REFER SERVICING DO NOT OPEN TO QUALIFIED PERSONNEL. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous” voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric
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TABLE OF CONTENTS INTRODUCTION: ISA Series Overview .......................................................................................4 Front Panel Illustration .........................................................................................4 Rear Panel Illustrations ........................................................................................5 FEATURES & SETUP : Power Switch ............................................................................................6 Co
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INTRODUCTION- INTRODUCTION AND FRONT PANEL ILLUSTRATION Thank you for the purchase of your new ISA amplifier. To get For those systems with QSC DataPort accessories (DSP, the most out of your amplifier, review this manual carefully. The crossovers & filters, remote cinema monitoring) a DataPort V2 installation, connection and operation sections provide useful (version 2) is included on all ISA models. Consult your QSC guidelines to get you up and running quickly and correctly. represe
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FEATURES & SETUP- LED INDICATORS If no indication: see previous page for suggested POWER: green LED that illuminates when the power items to check. switch is set to the on position and AC power is present at the IEC cord receptacle. When power is switched off: the LED may take several seconds to extinguish (go out); this is normal. Normal indication: at power-on the LED will illumi- nate at half-brightness for 2-3 seconds, then it illumi- nates to full-brightness. SIGNAL: green LED that lights
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FEATURES & SETUP- STEREO & PARALLEL OPERATING MODES STEREO: Each input signal is sent to its respective channel. Each channel has independent low-frequency (subaudio) filtering, clip limiting, gain control, and output connection. When to use STEREO input configuration: Use stereo mode for stereo sources (L-R inputs) and any other situation that requires each channel to be completely separate from the other. How to use STEREO mode: 1- Set the DIP switches for stereo mode operation (see facing p
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FEATURES & SETUP- STEREO & PARALLEL MODE DIP SWITCH SETTINGS SETTING THE DIP SWITCHES FOR STEREO OR PARALLEL MODE- “non-T” models ISA 280, ISA 450, ISA 750: Refer to the switch setting keys for each mode, to the right. These keys are printed on the amplifier’s rear panel for easy reference when you are behind the equipment rack. STEREO Mode- Set switch #4, 5, 6 and #7 to the left. PARALLEL Mode- Set switch #4 and #5 to the ISA 280, ISA 450 and ISA 750 mode switches. right; set switch #6 and #7 t
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INSTALLATION: RACK MOUNTING AND MOUNTING DIMENSIONS NOTE: Rack mounting of amplifier is optional. Amplifiers are inherently heavy. It is Securing the Front Ears to the Rack Rails highly recommended that you have an Use four screws and washers when mounting the assistant support the amplifier during ISA amplifier to the front rails. Support the weight rack installation to avoid injury. of the amplifier while securing it to the rails to avoid bending or distorting the front rack mount ears. ISA Ra
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INSTALLATION: COOLING REQUIREMENTS & AC MAINS FAN COOLING- All QSC amplifiers draw cool air into the rear of the amplifier and exhaust the hot air from the front. This is done so that the equipment in the rack stays as cool as possible. This method of cooling also gives the technician “direct” air temperature feedback at the front of the rack, where it is the most conve- nient. The front panel’s temperature is an accurate indicator of “how hard” the amplifier is working. The fan varies speed aut
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CONNECTIONS: OUTPUTS- USING THE SCREW TERMINAL CONNECTIONS GENERAL- The screw terminal output connections are protected by a hinged plastic cover. To make connections to the screw terminals, you will need to swing the cover door open. Gently pry the cover with your finger tips on the side that has the wire openings. After the door is open, loosen the screws for the terminals you are planning to use. Do this by rotating the screw counter-clockwise with an appropriate screwdriver. After loosening
