QSC CXD4.2
Processing Amplifier
4 channels 400 watts/ch at 8 400 watts/ch at 4 325 watts/ch at 2
The QSC CXD Series represents a revolutionary advancement in amplifier technology and innovation. Designed specifically for the needs of integrators CXD provides efficient robust and extraordinarily high fidelity power to drive multiple channels and configurations of loudspeakers while simultaneously deploying sophisticated digital processing – all with optimal energy and rack space efficiency. The CXD Series consists of three powerful four-channel amplifiers each with onboard DSP and the capability to configure and combine channels in various ways to drive a wide range of loudspeaker systems including 70V and 100V without the use of Install Sound > Install Speakers > Transformers. These amplifiers not only provide the power and processing to make your system perform better they offer outstanding efficiency ensuring that energy costs will be kept to a minimum over the life of the installation.
Flexible Amplifier Summing Technology™ (FAST)
CXD amplifiers feature Flexible Amplifier Summing Technology™ (FAST) that actively distributes the total amplifier power in various configurations across one two three or all four outputs. On the CXD4.3 and CXD4.5 this power can also be used to drive 70V or 100V speaker lines directly from any one or all of the four outputs. This flexibility allows CXD Series amplifiers to drive (for example) two full-range surface mounted speakers along with a subwoofer and one 100V distributed speaker line; or a high-power subwoofer and a bi-amplified full-range loudspeaker; three 70V distributed speaker lines and a low impedance surface mount speaker line; or a single high-power channel driving monster subwoofers.
Power Efficiency
CXD Series amplifiers use QSC’s next generation class-D power amp design in combination with a custom power stage utilizing a new output device. These purpose built MOSFET devices provide high voltage operation without needing a full bridge output and offer better audio quality and thermal performance due to co-location of the semiconductors.
CXD amplifiers benefit from the proven PowerLight power supply made even better with Power Factor Correction (PFC) that aligns the current waveform with the AC mains voltage waveform. PFC enables CXD Series amps to draw current from the wall in a more efficient and controlled manner resulting in incredible power from a single standard AC breaker.
CXD amplifiers also incorporate several energy conservation and efficiency strategies. One such tool is the unique multi-stage sleep mode that saves energy when possible without sacrificing performance.
System Processing
A single CXD Series amplifier is more than just an amplifier. It is also a capable and sophisticated loudspeaker processor. Integration of DSP and amplification means that the processor knows exactly what the amplifier is doing allowing the dynamics processing and protection circuitry to be far more accurate and effective. This synergistic approach employs both RMS and Peak Limiters that provide the amplifier and loudspeaker combination to produce more output without being pushed to distortion or destruction.
The onboard DSP offers four channels of crossover filters parametric EQ alignment delay and dynamics processing - everything needed to optimize a loudspeaker system. Additionally when using QSC loudspeakers the CXD amplifiers offer Intrisic Correction™ a combination of Filtering Limiting and speaker processing first developed for our WideLine line array loudspeakers that compensates for the non-linearities in array and horn design resulting in exceptional performance.
Space Efficient
With four channels of amplification plus signal processing in just 2RU the CXD series replaces equipment taking up as much as three times the rack-space.
Simplicity and Control
The on-board processing is managed and stored as presets with 20 modifiable factory presets for the most common applications. A Preset Wizard is also available that simplifies amplifier setup and enables selection of loudspeakers. With an intuitive front panel UI programming is a breeze. The CXD amplifiers also offer GPIO for system supervision and the ability to utilize contact closures to set the amps into standby or recall specific presets. With a host of integration features the CXD amplifiers are perfect for your application.
Features:
- 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
Specifications
| CXD4.2 | CXD4.3 | CXD4.5 | ||||
|---|---|---|---|---|---|---|
| 4 Channels1 100 V rms 70 V rms 8Ω 4Ω 2Ω |
Dynamic N/A N/A 500 W 700 W 625 W |
Continuous N/A N/A 400 W 400 W 350 W |
Dynamic 500 W 625 W 900 W 1400 W 1200 W |
Continuous 500 W 625 W 625 W 625 W 625 W |
Dynamic 1000 W 1250 W 1200 W 2000 W 1600 W |
Continuous 1000 W 1250 W 1150 W 1250 W 625 W |
| 2 Channels1 AB CD 8Ω 4Ω 2Ω |
Dynamic 1200 W 1500 W 1500 W |
Continuous 800 W 800 W 650 W |
Dynamic 2400 W 2000 W 2500 W |
Continuous 1250 W 1250 W 1250 W |
Dynamic 4000 W 2400 W 4000 W |
Continuous 2250 W 2250 W 2100 W |
| 1 Channel1 ABCD 8Ω 4Ω 2Ω 1Ω |
Dynamic 1600 W 2500 W 1700 W 2500 W |
Continuous 1500 W 1600 W 1600 W 1600 W |
Dynamic 3500 W 5000 W 3500 W 5000 W |
Continuous 2500 W 2500 W 2500 W 2500 W |
Dynamic 4500 W 7500 W 4500 W 7500 W |
Continuous 4200 W 4200 W 4200 W 3700 W |
| Bridged Mono (A+B or C+D) 100 V rms2 70 V rms2 8Ω |
Dynamic 700 W 1250 W 1400 W |
Continuous 700 W 1250 W 800 W |
Dynamic N/A N/A 2800 W |
Continuous N/A N/A 1350 W |
Dynamic N/A N/A 3200 W |
Continuous N/A N/A 2500 W |
| 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% |
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| Maximum distortion 4Ω–8Ω |
1.00% | 1.00% | 1.00% | |||
| Frequency response (8Ω) | 20 Hz–15 kHz ±0.2 dB 20 Hz–20 kHz +0.2/-0.7 dB |
20 Hz–15 kHz ±0.2 dB 20 Hz–20 kHz +0.2/-0.7 dB |
20 Hz–15 kHz ±0.2 dB 20 Hz–20 kHz +0.2/-0.7 dB |
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| Noise Unweighted Output Unmuted Weighted Output Muted |
-101 dB -109 dB |
-101 dB -109 dB |
-101 dB -109 dB |
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| Gain (1.2V setting) | 34.0 dB | 38.4 dB | 38.4 dB | |||
| Damping factor | >150 | >150 | >150 | |||
| Input impedance | >10 kΩ, balanced or unbalanced | >10 kΩ, balanced or unbalanced | >10 kΩ, balanced or unbalanced | |||
| Maximum rms input level (3.9V setting) (1.2V setting) |
12.28 V (+24 dBu) 3.88 V (+14 dBu) |
12.28 V (+24 dBu) 3.88 V (+14 dBu) |
12.28 V (+24 dBu) 3.88 V (+14 dBu) |
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| 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 | |||
| Rear panel connectors | Input: Four 3-pin Euroblock | |||||
| Output: Four 2-pin Euroblock Speaker | ||||||
| Link/IO: USB Type B; GPI; two GPIO | ||||||
| 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 | 4.2: Universal Power Supply 100-132/200–240 VAC, 50–60 Hz | |||||
| 4.3/4.5: Universal Power Supply 100–240 VAC, 50–60 Hz | ||||||
| Dimensions (HWD) | 3.5” × 19” × 12” | 3.5” × 19” × 16” | 3.5” × 19” × 16” | |||
| (89 mm × 482 mm × 305 mm) | (89 mm × 482 mm × 406 mm) | (89 mm × 482 mm × 406 mm) | ||||
| 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, all channels driven ² 70V & 100V are available on CXD4.2 only when channels are bridged in pairs |
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