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Important Safety Precautions & Explanation of Symbols

1- Read these instructions.
2- Keep these instructions.
3- Heed all warnings.
4- Follow all instructions.
5- WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture. Do not use this apparatus near water. 
6- Clean only with a dry cloth.
7- Do not block any ventilation openings.
8- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. 
A grounding plug has two blades and a grounding prong. The wide blade or third prong are provided for your safety. If the provided plug 
does not fit your outlet, consult an electrician for the replacement of the obsolete outlet.
10- Protect the power cord from being walked on or pinched, particularly plugs, convenience receptacles, and the point where they exit 
from the apparatus.
11- Use only attachments/accessories specified by QSC Audio Products, Inc.
12- Use only with hardware, brackets, stands, and components sold with the apparatus or by QSC Audio Products, Inc.
13- Unplug the apparatus during lightning storms or when unused for long periods of time.
14- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as 
power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to 
rain or moisture, does not operate normally, or has been dropped.

The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and main-
tenance (servicing) instructions in this manual.

The lightning flashes printed next to the OUTPUT terminals of the amplifier are intended to alert the user to the risk of hazardous 
energy. Output connectors that could pose a risk are marked with the lightning flash. Do not touch output terminals while amplifier 
power is on. Make all connections with amplifier turned off.

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsu-
lated "dangerous" voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock 
to humans.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER 

SERVICING TO QUALIFIED PERSONNEL.

WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture.

FCC INTERFERENCE STATEMENT
NOTE: 

This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to part 15 of the FCC rules. These limits are 

designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio 
frequency energy and if not installed and used in accordance to the instructions, may cause harmful interference to radio communications. However, there is 
no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, 
which can be determined by switching the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following 
measures:

•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and the receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio or TV technician for help.

© Copyright 2006, QSC Audio Products, Inc.

QSC® is a registered trademark of QSC Audio Products, Inc.

"QSC" and the QSC logo are registered with the U.S. Patent and Trademark Office

Speakon® is a registered trademark of Neutrik Inc.

   All trademarks are the property of their respective owners.

Summary of Contents for PLX 1802

Page 1: ...fiers User Manual 4 ohm minimum impedance models with Speakon output terminals PLX 1104 PLX 1804 2 ohm minimum impedance models with Speakon and binding post terminals PLX 1802 PLX 2502 PLX 3102 PLX 3...

Page 2: ...er to the risk of hazardous energy Output connectors that could pose a risk are marked with the lightning flash Do not touch output terminals while amplifier power is on Make all connections with ampl...

Page 3: ...d 21 step detented Active inrush current limiting eliminates need for power sequencing LED indicators for power input signal presence 10 dB and clip protect Rear chassis tabs and front panel design pr...

Page 4: ...om QSC s Technical Services Group The cast front panel includes finger grips at each end mak ing lifting and setting into the rack more comfortable 1 Input Configuration switch 2 1 4 inch TRS input co...

Page 5: ...Draw The table at the right provides typical current draw for each model as a function of load and output power level Units of measurement are amperes rms NOTE Current draw shown is for 120 VAC line F...

Page 6: ...the clip limiter Low Frequency Filters PLX 1802 2502 3102 3602 models only Each channel has independent filter selection of Full Range infrasonic filter only 33 Hz low cut 100 Hz low cut or 100 Hz Hi...

Page 7: ...The signal s source impedance should be less than 600 ohms Input Pinouts Balanced inputs Connect to the plug as shown XLR TRS Unbalanced inputs Connect to the plug as shown If using an XLR connector...

Page 8: ...tput connection Bridge mode configures the channel pair to drive a single high power loudspeaker load The INPUT CONFIGURATION switch must be set for BRIDGE mode Use only Channel 1 s input and Gain con...

Page 9: ...for damaged speakers or overloaded signal source The amplifier Gain control should be in the upper half of its range to prevent input overload SIGNAL SIG 10 GREEN Normal indication The SIG signal indi...

Page 10: ...reduced levels At the minimum setting the signal is completely cut off Note The GAIN controls do not adjust the power of the amplifier They adjust its sensi tivity to input signals Gain controls and...

Page 11: ...riven too hard into loads less than the rated 4 ohm minimum If the amplifier overheats due to prolonged overload or high external temperature it will mute for about 30 seconds with the fan running at...

Page 12: ...ack to front air flow through heat sink array CONTROLS Front AC POWER switch Gain controls each channel 21 detents Back AC circuit breaker LED INDICATORS POWER blue SIGNAL green x 2 10 dB green x 2 CL...

Page 13: ...o reactive or mismatched loads COOLING Continuously variable speed fan back to front air flow through heat sink array CONTROLS Front AC POWER switch Gain controls each channel 21 detents Back Input Co...

Page 14: ...Speakon Wiring Reference Amplifier connection To loudspeaker Two wire single channel connection Four wire two channel connection Bridge mode connection NOTE Ensure proper polarity when connecting brid...

Page 15: ......

Page 16: ...taktinformationen f r QSC Audio Products QSC Audio Products Mailing address QSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa CA 92626 1468 USA Telephone Numbers Main Number 714 754 6175 Sale...

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