Instruction/ maintenance manual of the product PLX 1804 QSC Audio
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PLX Series Professional Audio Amplifiers User Manual 4-ohm minimum imped ance models with Sp eakon ® output termina ls: PLX 1104 PLX 1804 2-ohm minimum imped ance models with Sp eakon and bindin g po st terminals: PLX 1802 PLX 2502 PLX 3102 PLX 3602 *TD-000214-00* TD-000214-001Rev .
2 Important Safety Precautions & Explanation of Symbols 1- Read these instructions. 2- Keep these instructions. 3- Heed all warn ings. 4- Follow all instr ucti ons. 5- WARNING: T o prevent fire or electric shock, do not expose this equ ipment to rain or moistu re.
3 Introduction Thank you for purchasing this QSC power amplifier . Please read t he following directions to obtain the best results. This manual covers all models of the PLX series.
4 Rack Mounting Use four screws and washers to mount the amplifier to the equipment rack rails. T o use the amplifier outside a rack, attach the self-adhesive rubber feet to the bottom. For portable, mobile, or other applications where the rack assembly may be moved, we strongly recommend support- ing the rear of the amplifier .
5 Cooling Air flows from the rack, into the back of the amplifier , and out the front. This keeps the rack cool. The fan automatically runs faster when the amp is working hard. Do not block the front or rear air vent s! AC Mains Connection Connect AC power to the IEC socket on the back of the amplifier .
6 Input Configuration Switch (PLX 1802/2502/3102/3602 models only) Select the input configuration by sliding the switch to the position which corresponds with the desired input configuration.
7 Inputs Each channel has a balanced XLR (female) and 1/4-inch TRS input. The XLR and TRS connectors for each channel are wired in parallel and can be used for “ daisy chain- ing” an input signal to additional amplifiers. The input impedance is 20k ohm balanced or 10k ohm unbalanced.
8 Outputs The PLX 1104 and PLX 1804 models are equipped with Speakon output connectors for each channel. PLX 1802, PLX 2502, PLX 3102, and PLX 3602 models are equipped with Speakon and binding post output connectors. Wiring connections are shown on the back of the chassis.
9 LED Indicators The LED indicators can be used to monitor system operation and identify common problems. POWER (PWR): BLUE Normal indication: •AC switch ON: LED will illuminate. If no indication: •Check AC power cord and AC outlet. •Confirm that AC switch is in ON position.
10 Gain Controls T urn the GAIN controls clockwise to increase gain and counter clockwise to decre ase gain. The GAIN controls are marked in dB of attenuation. There are 21 detents for repeatable adjustments. The upper 14 steps are about 1 dB each, and settings should normally be made within this range.
11 Protection Sy stems Both amplifier platforms are fully protected against adverse conditions, but their behavior and user adjustments are different. PLX 1802/2502/3102/3602 models: •Clip Limiting may be switched on the rear panel to prevent seve re overdrive.
12 Specifications PL X 1104, PLX 1804 PLX 1104 PLX 1804 OUTPUT POWER (Watts) (1) 20 - 20k Hz, 0.05% THD, 8 ohms/Ch. 310 550 1k Hz, 0.1% THD (EIA), 8 ohms/Ch. 325 600 20 - 20k Hz, 0.05% THD, 4 ohms/Ch. 500 800 1k Hz, 0.1% THD (EIA), 4 ohms/Ch. 550 900 DISTORTION, SMPTE-IM 0.
13 Specifications PLX 1802, PL X 2502, PLX 3102, PLX 3602 PLX 1802 PLX 2502 PLX 3102 PLX 3602 OUTPUT POWER (W atts) (1 ) 20 - 20k Hz, 0.05% THD, 8 ohms/Ch. 320 425 550 725 1k Hz, 0.1% THD (EIA), 8 ohms/Ch. 330 450 600 775 20 - 20k Hz, 0.05% THD, 4 ohms/Ch.
14 Appendix A: Speakon Wiring Reference Amplifier co nnection T o loudspeaker T wo-wire, si ngle-channel conn ection Four -wire, two-channel connect ion Bridge mode connect ion NOTE! Ensure proper pol.
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QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA ©2006 “QSC” and the QSC logo are registered wi th the U.S. Patent and T rademark Office.
An important point after buying a device QSC Audio PLX 1804 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought QSC Audio PLX 1804 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data QSC Audio PLX 1804 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, QSC Audio PLX 1804 you will learn all the available features of the product, as well as information on its operation. The information that you get QSC Audio PLX 1804 will certainly help you make a decision on the purchase.
If you already are a holder of QSC Audio PLX 1804, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime QSC Audio PLX 1804.
However, one of the most important roles played by the user manual is to help in solving problems with QSC Audio PLX 1804. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device QSC Audio PLX 1804 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
