Q-SYS CX-Q 4K8 Eight-Channel Network Amplifier

Q-SYS CX-Q Series network amplifiers combine a legacy of robust power amplifiers, advancements in high-efficiency output devices and native network transport, control and monitoring capabilities. CX-Q 4K8 features eight channels, capable of delivering customized power output loading and a total maximum power of up to 4000 W. Low-Z, 70 V or 100 V direct drive are available on all channels.


Model: CX-Q 4K8

Build for Q-SYS – Simple drag-and-drop integration into your Q-SYS design, enabling network routing, advanced processing and control.

Legacy of power redefined – These network amplifiers are built with a 5th generation high-efficiency, Class-D hybrid powertrain design built upon the dependable PL380 PowerLight™ amplifier platform.

Flexible & efficient channel power distribution – CX-Q Series network amplifiers feature FlexAmp™ and FAST (Flexible Amplifier Summing Technology™), which combine to provide extreme flexibility in output deployment.

Routable input options – Eight channels of mic/line inputs (with +12 V phantom power) for additional on-ramps into Q-SYS.

Additional Features

- PowerLight universal switchmode power supply with PFC for highest efficiency, improved audio performance and low weight

- Touch-proof Euroblock loudspeaker connections

- Eight bi-directional GPIO connections for further control and integration of third-party peripherals within Q-SYS

- Automatic energy saving modes ensure that the amplifier will draw the minimum amount of AC power while still providing outstanding audio quality

General Specifications

CX-Q 4K8 CX-Q 8K8
Typical distortion 
 0.02 – 0.05%
 0.04 – 0.1%
Maximum distortion 4Ω – 8Ω 1.0%
Frequency response 20 Hz – 20 kHz +/- 0.3 dB
Unweighted output muted > 101 dB
Weighted output muted > 104 dB
Gain (1.2V setting) 35 dB 38 dB
Damping factor > 100
Input impedance > 8k balanced and > 4k unbalanced
Amplifier and load protection Short circuit, open circuit, over current, over voltage, thermal, RF,
DC fault shutdown, active inrush limiting, on/off muting
AC power input Universal power supply 100 – 240 VAC, 50 – 60 Hz
Agency approvals UL, CE, RoHS/WEEE compliant, FCC Class B (conducted and radiated emissions)
Carton contents IEC cable, quick start guide, Euro (green) connectors

Power Specifications

CX-Q 4K8 CX-Q 8K8
Max Power Max Power
8 Independent Channels A, B, C, D, E, F, G, H 70V 1000 W 1250 W
100V 1000 W 1250 W
1000 W 1250 W
 4Ω 1000 W 1500 W
 2Ω 1000 W 1200 W
2 Channels BTL Bridged
A+B or C+D or E+F or G+H
Doubles Voltage 
140V 1500 W 2000 W
200V 1500 W 2000 W
1500 W 3000 W
1400 W 1700 W
2 Channels Parallel
AB or CD or EF or GH
Doubles Current 
70V 1500 W 2000 W
100V 1500 W 2000 W
1000 W 1250 W
1250 W 2400 W
1500 W 2500 W
3 Channels          Combined in Parallel
Triples Current 
1000 W 1250 W
1500 W 2000 W
1500 W 2500 W
4 Channel Bridged/Parallel
Doubles Current and Voltage 
2500 W 4000 W
3000 W 5000 W
4 Channels          Combined in Parallel
Quadruples Current 
1000 W 1200 W
2000 W 2400 W
2500 W 4000 W
3000 W 4000 W

NR* = Not Recommended due to excessive current draw

Controls, Indicators and Connections

CX-Q 4K8 CX-Q 8K8
Controls and indicators (front) Power • Channel MUTE buttons • Channel SELECT buttons • Channel Input Signal and CLIP LED Indicators Channel Output and LIMIT LED meters • NEXT, PREV, ID buttons • Control knob
Controls and indicators (rear) AC Power Disconnect (IEC C-14)
Input connectors “Q” models – 3-pin Euro (green) and Q-LAN Network connectivity
“Qn” models – Q-LAN Network connectivity only
Output connectors 8-pin Euro (green)

Weights and Dimensions

CX-Q 4K8 CX-Q 8K8
Dimensions (H×W×D) mm 89 × 482 × 406 89 × 482 × 406
Dimensions (H×W×D) in 3.5 × 19 × 16 3.5 × 19 × 16
Weight net 11.3 kg / 25 lb 11.8 kg / 26 lb
Weight shipping 13.2 kg / 29 lb 13.6 kg / 30 lb
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