• Flexible Amplifier Summing Technology™ (FAST) drives most any loudspeaker system or configuration by distributing total amplifier power across one, two, three or all four channels.

• Full function onboard loudspeaker processing DSP with Crossover and Parametric EQ Filters, Limiting and Alignment Delay eliminate the need for outboard loudspeaker processors.

• PowerLight universal switchmode power supply with PFC for highest effiency, improved audio performance, and low heat dissipation.

• Preset Wizard simplifies amplifier setup providing system design tools and loudspeaker selection from a list of speakers.

• Powerful Intrinsic Correction™ processing maximizes the sonic performance of QSC loudspeakers.

• 20 Factory Preset configurations that can be modified and stored in the 50 User Presets.

• Integrated front panel with channel Select and Mute buttons, Input and Output LED Metering, 400x240 LCD, intuitive navigation buttons, LED power button and indicator, and cast aluminum handles.

• GPIO for additional functionality including a heartbeat output for Life-Safety supervision.

• Four Input Phoenix connectors, and four Phoenix touch-proof Speaker

	CXD4.2	CXD4.3	CXD4.5
4 Ch. Continuous1 100 Vrms 70 Vmx 8Ω 4Ω 2Ω	N/A N/A 400 Watts 400 Watts 325 Watts	500 Watts 625 Watts 625 Watts 625 Watts 625 Watts	1000 Watts 1250 Watts 1150 Watts 1250 Watts 625 Watts
2 Ch. Continuous1 8Ω 4Ω 2Ω	800 Watts 800 Watts 650 Watts	1250 Watts 1200 Watts 1200 Watts	2250 Watts 2250 Watts 2100 Watts
1 Ch. Continuous1 8Ω 4Ω 2Ω 1Ω	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 8Ω 4Ω	0.01 - 0.03% 0.03 - 0.06%	0.01 - 0.03% 0.03 - 0.06%	0.01 - 0.03% 0.03 - 0.06%
Maximum Distortion 4Ω - 8Ω	1.0%	1.0%	1.0%
Frequency response (8Ω)	20 Hz - 15 kHz +/- 0.2 dB 20 Hz - 20 kHz +0.2 dB / -0.7 dB	20 Hz - 15 kHz +/- 0.2 dB 20 Hz - 20 kHz +0.2 dB / -0.7 dB	20 Hz - 15 kHz +/- 0.2 dB 20 Hz - 20 kHz +0.2 dB / -0.7 dB
Noise Unweighted Output Unmuted Weighted Output Muted	-101 dB -109 dB	-101 dB -109 dB	-101 dB -109 dB
Gain (1.2V setting)	34.0 dB	38.4 dB	38.4 dB
Damping factor	>150	>150	>150
Input impedance	>10k, balanced or unbalanced	>10k, balanced or unbalanced	>10k, balanced or unbalanced
Maximum input level (3.9V setting) (1.2V setting)	12.28V (+24 dBu) 3.88V (+14 dBu)	12.28V (+24 dBu) 3.88V (+14 dBu)	12.28V (+24 dBu) 3.88V (+14 dBu)
Controls and indicators (front)	Power  • Channel MUTE Buttons • Channel SELECT Buttons • Channel Input Signal and CLIP LED Indicators • Channel Output and LIMIT LED Meters • HOME, ENTER, EXIT, GAIN Navigation Buttons • Control Knob
Controls and indicators (rear)	AC Power Disconnect	AC Power Disconnect	AC Power Disconnect
Input connectors	3-pin Phoenix	3-pin Phoenix	3-pin Phoenix
Output connectors	2-pin Phoenix Speaker	2-pin Phoenix Speaker	2-pin Phoenix Speaker
Amplifier and load protection	Short circuit, open circuit, thermal, RF protection. On/Off muting, DC fault shutdown, active inrush limiting, input current limiting
AC Power Input	Universal Power Supply 100 - 240 VAC, 50 - 60 Hz
Dimensions (HWD)	3.5” x 19” x 12” (89mm x 482mm x 305mm)	3.5” x 19” x 16” (89mm x 482mm x 406mm)	3.5” x 19” x 16” (89mm x 482mm x 406mm)
Weight, Net / Shipping	18.5 lb (8.4 kg) / 22 lb (10.0 kg)	21.0 lb (9.5 kg) / 25 lb (11.3 kg)	22.0 lb (10.0 kg) / 26 lb (11.8 kg)
Agency approvals	UL, CE, RoHS/WEEE compliant, FCC Class A (conducted and radiated emissions)
Carton contents	Locking IEC Cable, Quick Start Guide, USB Cable
1 1.0 kHz sine wave, 1% THD, 1 channel driven