PLD Amplifiers User Manual PLD4.2 — 4 Channel, 1600 W Amplifier PLD4.3 — 4 Channel, 2500 W Amplifier PLD4.
EXPLANATION OF SYMBOLS The term “WARNING!” indicates instructions regarding personal safety. If the instructions are not followed the result may be bodily injury or death. The term “CAUTION!” indicates instructions regarding possible damage to physical equipment. If these instructions are not followed, it may result in damage to the equipment that may not be covered under the warranty. The term “IMPORTANT!” indicates instructions or information that are vital to the successful completion of the procedure.
FCC Statement NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Warranty (USA only; other countries, see your dealer or distributor) QSC Audio Products 3 Year Limited Warranty QSC Audio Products, LLC (”QSC”) guarantees its products to be free from defective material and/or workmanship and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and use, provided the unit is returned to our factory, one of our authorized service stations or an authorized QSC International Distributor via pre-paid
Introduction Built for system integrators, the PLD series amplifiers provide multi-channel amplification with built-in DSP and enough power to drive wide varieties of speaker systems with optimal energy efficiency. The PLD Series consists of three light-weight, 2RU, four-channel amplifiers with on-board DSP and flexible channel combining.
Features Amplifier Front Panel 1 12 2 3 4 5 6 7 8 9 10 13 14 15 16 11 — Figure 1 — 1. Output channels are labeled A, B, C, and D 9. Input Channel Signal-Present LEDs (Blue) 2. Output Channel Mute Buttons and LEDs (Red) 10. Input channels are labeled 1, 2, 3, and 4 3. Output Channel Limiter LEDs (Red) 11. LCD Graphic Display 4. Output Channel -10 dB Below Limiter Activation LEDs (Blue) 12. HOME Button 5. Output Channel -20 dB Below Clip LEDs (Blue) 13. ENTER Button 6.
Amplifier Control A B OUTPUT C ENTER Button • Navigates into the menu structure • Enters the edit mode for adjusting parameters • Confirms the changes you make and exits edit mode. D MASTER CONTROL MUTE MUTE MUTE MUTE ENTER HOME EXIT Button LIM EXIT ENTER • Navigates out of the menu structure and parameter selection. • In the edit mode, pressing EXIT reverts the value back to its prior state, and exits the edit mode.
PLD Amplifier Signal Flow Input Settings 1 Sensitivity Switch 2 Sensitivity Switch 3 Sensitivity Switch 4 Sensitivity Switch A/D Meter Output Processing Gain Source Select Mute Highpass Filter Gain / Polarity Lowpass Filter Gain / Polarity Lowpass Filter Amp Config.
Menu Tree Presets Inputs Outputs Utilities Preset Recall Input Sensitivity Source Select Status Preset Save Input Gain Processing Amp ID Preset Wizard Crossover Display PEQ Lockout Delay Password Limiter Array Correction* Load Speaker *For QSC Line Arrays only Save Speaker About Presets The PLD amplifiers are preset driven. In order to get the most out of the amplifiers, an understanding of how presets work is essential.
Installation The following steps are written in the recommended installation order. Mount the PLD Amplifier The PLD Series amplifiers are designed to be mounted in a standard rack-mount unit. The amplifiers are 2RU high, the PLD4.3 and 4.5 are 381 mm (15 in) deep, the PLD4.2 is 229 mm (9 in) deep. Depending on the depth of your rack, the Rear Rack Ear Support kit (FG-000031-00) may be required for rack mounting. Refer to http://qsc.com/products/ under Accessories for details.
Inputs Connect the Audio Inputs Balanced Inputs Unbalanced Inputs 2 1 2 Ground 1 Positive 2 Ground 1+3 Negative 3 Positive 2 — Figure 10 — — Figure 11 — 3 3 1 — Figure 12 — There are four female XLR connectors labeled 1 through 4 that provide the audio inputs to the PLD amplifiers. A single input can be routed to one or a combination of outputs. You can use from one to four of the inputs. The inputs are 10 kΩ balanced or unbalanced, with a selectable sensitivity of either +4 or +14 dBu.
WARNING!: When the AC Power is on, there is a potential of having dangerous voltage at the output terminals on the rear of the amplifier. Use caution not to touch these contacts. Turn off the AC Mains disconnect switch prior to making any connections. IMPORTANT: QSC recommends that you connect jumpers where the terminals are the same points electrically. Refer to Figure 14 thru Figure 22. 1. Turn the AC Mains power switch to on.
AB Parallel C+D Bridged F5: AB C+D F5: AB C+D 1+ 1- 2+ 1+ A 1- B X = Subwoofer = Mid Range 1 AB 1+ 3 C+D The following are electrically the same point A (1+) and B (1+) A (1-) and B (1-) X (2+) and Y (1+) X (2-) and Y (1-) C D 1- Y Optional — Figure 17 — AB Parallel CD Parallel F4: AB CD F4: AB CD 1+ 1- 1+ A 1- B X D Y B X D Y = Subwoofer = Mid Range 1 AB 3 CD The following are electrically the same point A (1+) and B (1+) A (1-) and B (1-) C (1+) and D (1+) C (1-) and D
F2: AB C D AB Parallel C Single D Single F2: AB C D 1+ A 1- 1+ B X D Y B X D Y 1- = Subwoofer 1 AB 3 C = Full Range 4 D 1+ 1The following are electrically the same point A (1+) and B (1+) A (1-) and B (1-) C 1+ 1- Optional — Figure 21 — Four-Channel Configuration A Single B Single C Single D Single F1: A B C D F1: A B C D 1 A 2 B 3 C 1+ 1- 1+ 4 D = Full Range 1- 1+ A C 1- 1+ 1- — Figure 22 — Connect the Loudspeakers WARNING!: When the AC Power is on, there is a
Output Connectors Standard Bridged Mode NL4 A Separate Ch A 1+ / 1Ch B 2+ / 2-1 B 1+ / 1- AB Parallel ABC Parallel ABCD Parallel 1+ / 1- 1+ / 1- 1+ / 1- 1+ / 1- 1+ / 1- 1+ / 1- 1+ / 1- 1+ / 1- A B X C D Y CD Parallel C Ch C 1+ / 1Ch D 2+ / 2-1 D 1+ / 1- 1+ / 11+ / 1- 1+ / 1- — Figure 24 — A+B Bridged C+D Bridged AB+CD Bridged 1+ / 1- 2+ / 2-1 1+ / 1- X Y 1+ / 1- — Table 1 — 1 For Bi-Amp operation.
PLD 4.
Step 2 — Select Output Channel for Speaker Assignment OUTPUTS SPEAKERS SAVE Output: A B C D Imped: 8.0 8.0 8.0 8.0 Power: 625 625 625 625 Spkr: ---- ---- ---- ---- Assign Assign Assign Assign When you are finished setting the Impedance and Power for each output, continue to scroll to access the SPEAKERS tab. Scroll to select Output channel Loudspeaker assignment is optional, you can assign a loudspeaker to one or more channels, or none at all.
Create New Preset from an Existing Preset To create a preset from an existing preset, recall the preset with the desired output configuration, modify the Input parameters, Output parameters, then save the preset. In addition, you can save the preset as you are going thru the creation process. Recall a Preset A Preset includes the output configuration, input parameters, and loudspeaker profiles (DSP, load, and assignments). There are 20 factory presets that can be recalled, but not overwritten.
Set up the Inputs NOTE: Changes made to input levels are in real time. HOME > INPUTS > INPUT SENS > ENTER Step 1 — Select Input Sensitivity Input 1 F1: A B C D Inputs > Input Sens Scroll to select (+14 or +4 dBu) (The background turns to green.) To confirm selection, press +14 dBu INPUT SENS To move to the next input, press ENTER SEL Repeat procedure for remaining input channels.
Loudspeaker Processing The Speaker Processing section allows you to make adjustments to the Crossover, EQ, Delay, Limiter, and QSC Array details for each output channel. In addition, you can load a pre-defined loudspeaker then make any adjustments needed, and save the changes as a user-defined loudspeaker. Depending on the loudspeaker selection, various parameters are not available for adjustment. When you make adjustments, you are making them in real time.
HOME > OUTPUTS > SPKR PROC > CROSSOVER > GAIN/POL > GAIN > ENTER Step 2 — Set the Crossover Gain and Polarity Output A F1: A B C D Scroll to select (Gain or Polarity) 20 dB To edit, press + Gain -100 to +20 dB – -60 dB Gain -5.5 dB Gn/Pol Polarity + or - Polarity POL + ENTER Turn to adjust parameter To confirm, press To exit, press ENTER EXIT Parametric EQ HOME > OUTPUTS > SPKR PROC > PEQ > BAND 1, 2, 3, 4, OR 5 > BAND BYPASS > ENTER The graph is a composite of all five bands.
Limiter HOME > OUTPUTS > SPKR PROC > LIMITER > ENTER Step 1 — Set the Limiter Mode Output A F1: A B C D To edit the Limiter mode, press ENTER Turn to select the mode for the Limiter AUTO AUTO Type Med SpkrPwr 200W SpkrImp 8.0 ADV OFF To confirm setting, press ENTER HOME > OUTPUTS > SPKR PROC > LIMITER > AUTO NOTE: SpkrPwr maximum output depends on the amplifier and the output configuration you select.
Array Correction NOTE: You must have a QSC line array loaded in order to access the Array Correction parameters. HOME > OUTPUTS > SPKR PROC > ARRAY > ENTER Step 1 — Set Splay Angle and Number of Boxes in the Array Output A F1: A B C D Scroll to select (Angle or Boxes#) Splay Angle: Total cumlative angle of the array. Angle: 0.0˚ to 90.0˚ Array Length: Total number of boxes in the array. Boxes #: 0 to 20 Angle 15.
Save the Preset After modifying the Inputs and Outputs for all channels, save the current settings as one of the 50 user-defined presets (U1: thru U50:). Each of the user presets, by default, is the same as factory preset F1: Config A B C D, so when you save the preset you are "overwriting" the preset currently in that numbered position. If you started by recalling a factory preset, you must use the SAVE AS feature.
Utilities HOME > UTILITIES > STATUS > ENTER Step 1 — Check the amplifier's health UTILITY - STATUS Amp Total Run Time: Temperature (PLD 4.3 & 4.5) Thermal Limiting starts at 69ºC Thermal Shutdown at 80ºC Amp Total Run Time: HH:MM:SS 22:37:48 Hrs Hardware: V12 Temperature: Hardware version Firmware: V1.0.
Included Loudspeaker Profiles QSC Audio EV Peavy AP-5102 ELX112 PR10 AP-5122 ELX115 PR12 AP-5122m FOH ELX215 PR15 AP-5122m MON TX2152 PV115 AP-5152 TX2181 PV118 GP118-sw GP212-sw PV12M JBL PV215 GP218-sw JRX112M PVX12 S8T JRX115 PVX15 S10T JRX118S SP218 S12 JRX125 SP4 WL118-sw MRX515 WL-2102 MRX518S WL212-sw MRX525 WL218-sw MRX528S Yahama BR12 BR12M BR15 PRX415M B52 C115V PRX425 LX1515V3 SRX712M LX18V3 SRX715 MX1515 SRX718S MX18S SRX722 S115V S215V SM15V
Specifications PLD4.2 PLD4.3 PLD4.5 4 Ch. Continuous1 8 4 2 400 Watts 400 Watts 325 Watts 625 Watts 625 Watts 625 Watts 1150 Watts 1250 Watts 625 Watts 2 Ch. Continuous1 8 4 2 800 Watts 800 Watts 650 Watts 1250 Watts 1200 Watts 1200 Watts 2250 Watts 2250 Watts 2100 Watts 1 Ch. Continuous1 8 4 2 1 1600 Watts 1600 Watts 1600 Watts 1600 Watts 2500 Watts 2500 Watts 2500 Watts 2500 Watts 4200 Watts 4200 Watts 4250 Watts 3700 Watts Typical Distortion 8 4 0.01 - 0.03% 0.03 - 0.06% 0.
Heat Loss Charts BTU/hr kcal/hr Idle PLD 4.3 225 57 PLD 4.5 286 72 Load per Channel 8Ω BTU/hr 4Ω kcal/hr BTU/hr 2Ω kcal/hr BTU/hr kcal/hr 1/8th Power PLD 4.3 684 172 794 200 1040 262 PLD 4.5 811 204 1144 288 1124 283 PLD 4.3 983 248 1261 318 1869 470.988 PLD 4.5 881 222 1708 430 1737 438 PLD 4.3 2498 629 2925 737 4198 1058 PLD 4.5 3116 785 5318 1340 4208 1060 1/3rd Power Full Power Idle Thermal loss at idle or with very low signal level.
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