CXD Amplifiers User Manual CXD4.2 — 4 Channel, 1600 W Amplifier CXD4.3 — 4 Channel, 2500 W Amplifier CXD4.
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 CXD 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 CXD Series consists of three light-weight, 2RU, four-channel amplifiers with on-board DSP and flexible channel combining as well as 70V and 100V direct drive.
Features Amplifier Front Panel 11 1 12 2 3 4 5 6 7 8 9 10 13 14 15 16 — 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 the 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.
CXD Amplifier Signal Flow Input Settings 1 2 3 4 Output Processing Amp Config.
Menu Tree Presets Inputs Outputs Utilities Preset Recall Input Sensitivity Mixer w/Noise & Tone Status Preset Save Input Gain Mode (Lo-Z, 70V, 100V) Amp ID Spkr Processing Display Crossover Lockout PEQ Password Delay GPIO Preset Wizard Limiter Array Correction* Load Speaker Save Speaker *For QSC Line Arrays only About Presets The CXD 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 CXD Amplifier The CXD Series amplifiers are designed to be mounted in a standard rack-mount unit. The amplifiers are 2RU high, the CXD4.3 and CXD4.5 are 381 mm (15 in) deep, the CXD4.2 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 USB ROUTABLE INPUTS 1 2 3 4 Unbalanced Balanced — Figure 11 — — Figure 12 — HEARTBEAT GPO GPI — Figure 10 — There are four three-pin Euro-style connectors labeled 1 through 4 providing the audio inputs on the CXD Amplifiers. A single input can be mixed 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 sensitivity of either +4 or +14 dBu. 1.
Outputs The CXD amplifiers have four configurable outputs. You can set the power, combine outputs (bridged and parallel), and adjust the DSP for each output. When the output configuration of the amplifier changes, the output terminals, controlled by relays, change accordingly. Use the diagrams shown in Figure 15 thru Figure 23 as a reference for wiring the loudspeakers.
F8: AB+CD AB Parallel Bridged with CD Parallel F8: AB+CD M AB+CD The following are electrically the same point T1+and T3+ T5- and T7- — Figure 16 — Two-Channel Configurations F6: A+B C+D A+B Bridged C+D Bridged F6: A+B C+D M A+B M C+D — Figure 17 — F5: AB C+D AB Parallel C+D Bridged F5: AB C+D M AB M C+D The following are electrically the same point T1+ and T3+ T2- and T4- — Figure 18 — F4: AB CD AB Parallel CD Parallel F4: AB CD M AB M CD The following are electrically the same point T1+ a
F7: ABC D ABC Parallel D Single F7: ABC D M ABC MD The following are electrically the same point T1+, T3+, and T5+ T2-, T4-, and T6- — Figure 20 — Three-Channel Configurations F3: A+B C D A+B Bridged C Single D Single F3: A+B C D M A+B M C M D — Figure 21 — F2: AB C D AB Parallel C Single D Single F2: AB C D M AB M C M D The following are electrically the same point T1+ and T3+ T2- and T4- — Figure 22 — Four-Channel Configuration F1: A B C D A Single B Single C Single D Single F1: A B C D
Connect the Loudspeakers 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 to not touch these contacts. Turn off the AC Mains disconnect switch prior to making any connections. 1. Turn the AC Mains power switch, on the back of the amplifier, to OFF. 2. Connect the loudspeaker wiring to the 8-pin Euro-style connector. Refer to Figure 15 thru Figure 23.
Preset Wizard NOTE: The power levels shown in this procedure are taken from the CXD4.3 unless indicated otherwise. CXD4.2 will show less power and CXD4.5 will show greater power. For complete details refer to the "Power Distribution Charts" on page 28. HOME > PRESETS > PRESET WIZARD > ENTER Step 1 — Adjust Impedance and Power OUTPUTS SPEAKERS Adjust Impedance based on the total loudspeaker load connected to the channel. SAVE A B C D Imped: 8.
Step 4 — Save Wizard Preset OUTPUTS SPEAKERS SAVE User Preset Number: 21 New Preset Name C o n f i g Scroll to the Save screen When you have finished selecting loudspeakers, continue to scroll to access the SAVE tab.
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 INPUT SENS +14 dBu To move to the next input, press ENTER SEL Repeat procedure for remaining input channels.
HOME > OUTPUTS > MIXER > ENTER Step 1 — Set Mixer Gains Output A F1: A B C D Adjust the Mixer Gain for the selected Input To confirm, press ENTER Scroll to remaining Inputs and repeat After confirming all settings, press MIXER Input 1 4.2 Input 2 -100.0 Input 3 2.7 Input 4 -100.
HOME > OUTPUTS > SPKR PROC > LOAD SPKR > ENTER Step 1 — Load an Existing Loudspeaker for the Selected Output ABOUT SPEAKERS Output: Speaker: To edit Speaker, press LOAD Band and Filter selections are displayed and constrained based on the loudspeaker.
EQ HOME > OUTPUTS > SPKR PROC > PEQ > BAND 1, 2, 3, 4, or 5 > ENTER The graph is a composite of all five bands. Each band has a full range of 20 Hz to 20 kHz. Step 1 — Set the EQ Output A F1: A B C D Type: Bypass, Parametric, Low Shelf, High Shelf (Default Bypass) Scroll to select (Type, Gain, Freq, BW) 20 dB Gain: -40 to +20 dB (Default 0.00) -60 dB Band 1 Type Gain Parametrc -35 dB Freq 100 BW .
HOME > OUTPUTS > SPKR PROC > LIMITER > AUTO NOTE: SpkrPwr maximum output depends on the amplifier and the output configuration you select. The maximum for separate channels is 1250 W, a single combined channel (ABCD or AB+CD) can be up to 5000 W depending on the amplifier. Step 2 — Set the AUTO Mode Parameters Output A F1: A B C D Type: Aggressive Medium Mild SpkrPwr: 10.
HOME > OUTPUTS > SPKR PROC > SAVE SPKR > ENTER When you Save a speaker profile, you are saving all of the Output settings currently active for the channel. The new profile you save does not need to be Loaded, it is already active. Step 1 — Save a Loudspeaker with Custom Load Profile ABOUT SPEAKERS Output Data: AB + CD Band: Scroll to select (Band, Nominal Imped, Power Rating) SAVE Nominal Impedance and Power Rating are the nominal settings for a single loudspeaker of this type.
Step 2 — Name the Preset U1: A B C D Indicates editing User Preset Number: o n f i g X press ENTER Scroll to desired letter position press ENTER Turn to select desired character press ENTER 21 New Preset Name C Scroll to New Preset Name A SAVE Indicates “New Preset Name” is selected Up to 21 characters A-Z/a-z/0-9/ _ / - / space Press ENTER to edit preset name Step 3 — Save Preset U1: A B C D When you are finished naming, press User Preset Number: 21 Scroll to SAVE New Preset Name
Utilities The Utilities section provides the following amplifier information and functionality: HOME > UTILITIES > STATUS > ENTER Check the Amplifier's Health UTILITY - STATUS Amp Total Run Time: Amp Total Run Time: HH:MM:SS 22:37:48 Hrs Temperature (CXD 4.3 & 4.5) Thermal Limiting starts at 69ºC Thermal Shutdown at 80ºC Hardware: V12 Temperature: Hardware version Firmware: V1.0.
HOME > UTILITIES > LOCKOUT > ENTER All controls are locked except the Mute buttons, the front-panel and rear power buttons, the Enter button and Master Control knob to unlock the amplifier.
Supported Loudspeakers 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 SW218V
Specifications CXD4.2 CXD4.3 CXD4.5 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 Heat losses are the thermal emissions from an amplifier while it is operating. It comes from dissipated waste power—i.e., real AC power in minus audio power out. Measurements are provided for various loads at idle, 1/8 of average full power, 1/3 of average full power, and full power, with all channels driven simultaneously. For typical usage, use the idle and 1/8 power figures.
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