QSC MX 700 User manual

PROFESSIONAL POWER AMPLIFIERSPROFESSIONAL POWER AMPLIFIERS
QSC's award-winning MX/MXa Series amplifiers
combine ultra-clean audio performance and unsur-
passed reliability while delivering maximum power
under the most demanding conditions. The MXa’s
achieve superior performance with high-efficiency
stepped linear output circuits,ensuring solid two-ohm
operation, night after night. They’re at home on tour
or in an installation rack; in a main or monitor system;
driving horns or pumping subwoofers.MX amplifiers
are trusted by leading touring companies and
venues around the world.
Stepped-linear output technology on MXa models reduce normal system cooling
requirements and AC current draw by greater than 40%. The MX 2000a's and
3000a's dual monaural construction boosts reliability by providing separate
power supplies for each channel. MXa rear panels feature our exclusive Level 1
Open Input Architecture, which allows the addition of input transformers,
crossovers, power limiters, precision attenuators, and other signal processing
accessories. An extensive set of protection features assure stable operation
and reliability, even under the harshest conditions.
•
3-year warranty plus optional
3-year extended service contract
MX Series Features
•High-efficiency stepped linear outputs reduce amplifier cooling requirements
and AC current draw by greater than 40%*
•Independent power supplies on each channel for greater reliability
(dual monaural on MX 2000a & MX 3000a, split secondary on MX 700 & MX 1500a)
•Power transistors direct–mounted metal-to-metal to heatsink for superior
thermal performance
•Level 1 Open Input Architecture for cost–and space–saving signal processing accessories*
•Independent DC, subsonic, ultrasonic , and thermal overload protection on each channel
automatically protect amplifier and speakers
•Patented Output Averaging short circuit protection
•Automatic two-speed fan matches cooling capacity to thermal requirements.
Rear-to-front air flow prevents rack overheating.
•1/4" TRS and barrier strip balanced inputs for low noise
•Comprehensive LED array monitors operation and performance
•"Touch-proof" binding post output connectors
•THX approved for cinema applications*
* Not included in the MX 700
1675 MacArthur Boulevard
Costa Mesa, CA 92626
Ph: 800/854-4079 or 714/957-7100
Fax: [phone]
www.qscaudio.com
MX
MX
Watts per channelModel
MX 8Ω4Ω2Ω*
700
150 225 350
1500a
350 500 750
2000a
450 650 1000
3000a
800 1200 1600
20 Hz–20 kHz, 0.01% THD
*1 kHz, 1% THD

1675 MacArthur Boulevard • Costa Mesa, CA 92626 • Ph: 800/854-4079 or 714/957-7100 • Fax: [phone] • www.qscaudio.com
MX 1500a
MX SPECIFICATIONS
150W
FTC 8 ohms 0.1% THD 20 Hz–20 kHz
EIA 8 ohms 1% THD 1 kHz
4 ohms 0.1% THD 20 Hz–20 kHz
170W
225W 500W 650W
4 ohms 1% THD 1 kHz
2 ohms
(typical)
1% THD 1 kHz
270W
350W 750W 1000W 1600W
600W 725W
400W 475W
350W 450W
MX 2000a MX 3000a
Stereo Mode (both channels driven)
1200W
1250W
825W
800W
MX 700
Continuous Average Output Power Per Channel
Bridge Mono Mode
FTC 8 ohms 0.1% THD 20 Hz–20 kHz
EIA 4 ohms
(Typical)
1% THD 1 kHz
450W
700W 1500W 2000W
1000W 1300W
3200W
2400W
Bridge-Mono Mode Operation
Frequency Response (20 Hz–20 kHz)
Damping Factor
Dynamic Headroom
Input Sensitivity (for full power @ 8 ohms) 0.96 Vrms 1.05 Vrms 1.07 Vrms
Voltage Gain 35x (31 dB) 50x (34 dB) 56x (35 dB)
Cooling (rear-to-front airflow)
Weight
Normal Operation at 4Ω/ch(120 VAC)
2-Speed Fan 2-Speed Fan 2-Speed Fan
25 lb (11.3 kg)
Less than 3.7 A
42 lb (19.1 kg)
Less than 10.5 A
54 lb (24.4 kg)
Less than 12 A
1.0 Vrms
80x (38 dB)
Variable Fan
69 lb (31.2 kg)
Less than 12 A
All models All models
Distortion (SMPTE-IM) Less than 0.05%
greater than 200
±0.5 dB ±0.15 dB ±0.15 dB +0.15 dB
3 dB at 4 ohms
Noise 100 dB below rated output
Output Circuit Type
Input Impedance
Controls
Indicators
Connectors (each channel)
Amplifier Protection
Load Protection MX 700
All Others
Power Requirements
Dimensions MX 700
MX 1500a
MX 2000a , MX 3000a
10 KΩunbalanced, 20 KΩbalanced
Front: AC Switch, Ch 1 and Ch 2 gain knobs
Back: Parallel/Stereo/Bridge Switch*
POWER: Green LED
SIGNAL: Yellow LED, 1 per channel*
CLIP: Red LED, 1 per channel
PROT: Red LED, 1 per channel**
Full short circuit†, open circuit, ultrasonic, and RF protection. Stable into reactive or mismatched loads.
AC coupled output. 2-second turn on and instant off muting.
On/off muting. DC-fault load grounding relay with internal fault fuses.
Complementary linear outputs: Class AB on MX 700, 2-Step Class H on MX 1500a & 2000a
3-Step Class H on MX 3000a
100, 120, 230 VAC, 50-60 Hz
19” (48.3 cm) rack mounting, 3.5” (8.9 cm) tall (2 rack spaces), 12.0” (30.5 cm) deep
19” (48.3 cm) rack mounting, 3.5” (8.9 cm) tall (2 rack spaces), 17.9” (45.5 cm) deep
19” (48.3 cm) rack mounting, 5.25” (13.3 cm) tall (3 rack spaces), 17.9” (45.5 cm) deep
*except on MX 700 **MX 700 uses single clip/protect LED † Output AveragingTM short circuit protection (US Patent 4,321,554) Specifications subject to change without notice.
Input: 1/4” TRS and Barrier strip
Speakers: Touch-proof binding posts