II. Overall Description, Portable rack

II. Overall Description

The CX Series from QSC comprises six high-efficiency professional power amplifier models, each with two independent channels. The table below lists the range’s audio power ratings.

MODEL

8Ω 1

4Ω 1

2Ω 2

25 volts3

70 volts1 100 volts1

CX4

CX4T

CX6

CX6T

CX12

CX12T

150 watts	225 watts	350 watts
150 watts	225 watts	350 watts	150 watts4	175 watts4	175 watts4
200 watts	300 watts	450 watts
200 watts	300 watts	450 watts	200 watts3	250 watts3	250 watts3
425 watts	600 watts	900 watts
425 watts	600 watts	900 watts	400 watts3	500 watts3	500 watts3

1:FTC watts per channel, 20 Hz–20 kHz, 0.1% THD

2:EIA watts per channel, 1 kHz, 1% THD

3:Watts per channel, 45 Hz-15 kHz, 0.25% THD

4:Watts per channel, 50 Hz-15 kHz, 0.25% THD

Each channel has its own power transformer secondary. The CX4, CX4T, CX6 and CX6T utilize complementary Class AB linear output circuitry. For improved efficiency, the CX12 and CX12T utilize Class H step linear complementary output circuitry and have bipolar multi-rail power supplies. The power transformers, as are the output transformers, are mounted in the front of the amplifier chassis, as close to the front mounting rails as

possible; this keeps the unit’s center of gravity forward to minimize the twisting force on the front
mounting ears. Still, the amplifier should be supported at all four corners, especially if it is in a
	MODEL	NET WEIGHT
portable rack.	MODEL	NET WEIGHT
portable rack.	CX4	13.6 kg; 27 lb
The CX4 and CX4T are two rack spaces high; the CX6, CX6T, CX12, and CX12T are three rack spaces	CX4	13.6 kg; 27 lb

high. The adjacent table lists the amplifiers’ weights by model.	CX4T	18.2 kg; 37 lb
The amplifiers require a rack depth of 18 inches (45.7 cm) to clear the rear support ears. Allow	CX6	20 kg; 42 lb
some additional clearance for input and output connectors at the rear panel, which is 16.9 inches	CX6T	25 kg; 55 lb
(42.9 cm) behind the plane of the frount mounting rails. The built-in cooling fan draws air in at	CX6T	25 kg; 55 lb
	CX12	22.7 kg; 50 lb
the rear of the chassis and exhausts it through vents in the front panel. The flow-through cooling	CX12	22.7 kg; 50 lb

scheme allows you to rack-mount the amplifiers one atop the other, with no clearance necessary
in between. This mounting technique also helps support the weight of the upper amplifiers.

The CX Series derives much of its design from our award-winning MXa Series amplifiers. They are engineered for stability and exceptional reliability, with protection for open or short circuits and mismatched loads. To protect your loudspeakers, the outputs mute during turn-on and turn-off, and also in the event of a DC fault. The CX4 and CX4T are AC coupled and cannot pass DC to the load. Therefore, the DC fault muting is not required. All protection circuitry automatically resets to normal when conditions assure safe operation.

Every CX amplifier features thermal management and protection in the form of a two-speed fan and extruded aluminum heat sinks with direct-mounted output devices. If a heat sink overheats to 85½ C or higher, a protection circuit mutes the amplifier channel output.

CX Series specifications

QSC Audio, a recognized leader in professional audio solutions, presents the CX Series of amplifiers, a fusion of power, efficiency, and cutting-edge technology designed to meet the demands of various sound reinforcement applications. Known for their reliability and outstanding performance, the CX Series amplifiers are perfect for installations in venues, theaters, and houses of worship, delivering high-quality audio reproduction regardless of the setting.

At the core of the CX Series is its robust Class D amplification. This technology not only ensures excellent audio fidelity but also enhances energy efficiency, resulting in lower operational costs and cooler running temperatures. The amplifiers utilize a linear power supply, which contributes to exceptional audio quality by providing stable and clean power to the components. With varying power ratings, including options ranging from 200 to 1200 watts per channel, the CX Series caters to different venue sizes and specific audio requirements.

The CX Series is engineered with a range of features that enhance usability and performance. Integrated DSP (Digital Signal Processing) allows users to access advanced sound processing algorithms, enabling fine-tuning of audio settings for optimal performance. The amplifiers include comprehensive protection circuitry to safeguard the equipment from thermal overload, short circuits, and signal clipping, ensuring longevity and reliability in demanding environments.

Connectivity is also a significant aspect of the CX Series. The amplifiers are equipped with a variety of input and output options, including XLR, 1/4" TRS, and barrier strip connectors, facilitating seamless integration with a wide range of audio sources and speakers. Moreover, the user-friendly interface includes LCD displays for easy monitoring, making setup and adjustments straightforward for audio engineers and technicians.

Another defining feature of the CX Series is its lightweight design. This portability makes installation and transport easy without compromising on performance. Additionally, QSC’s commitment to sustainability is evident in the design, as the amplifiers are constructed with environmentally friendly materials and have a reduced carbon footprint, aligning with modern practices in eco-conscious audio engineering.

In summary, the QSC Audio CX Series amplifiers blend professionalism with versatility, delivering exceptional performance that satisfies both audio quality and operational reliability. Their innovative technologies and thoughtful design make them a powerful ally for professionals in any sound reinforcement scenario.