QSC Audio MX700 User Manual
PROFESSIONAL POWER AMPLIFIERSPROFESSIONAL POWER AMPLIFIERS
MX
MX
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
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
Watts per channelModel
MX
8Ω 4Ω 2Ω
150 225 350
700
350 500 750
1500a
450
2000a
800 1200 1600
3000a
20 Hz–20 kHz, 0.01% THD
*1 kHz, 1% THD
650
*
1000
are trusted by leading touring companies and
venues around the world.
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: 714/754-6174
www.qscaudio.com
MX SPECIFICATIONS
Stereo Mode (both channels driven)
FTC 8 ohms 0.1% THD 20 Hz–20 kHz
4 ohms 0.1% THD 20 Hz–20 kHz
EIA 8 ohms 1% THD 1 kHz
4 ohms 1% THD 1 kHz
(typical)
2 ohms
Bridge Mono Mode
FTC 8 ohms 0.1% THD 20 Hz–20 kHz
EIA 4 ohms
Frequency Response
Input Sensitivity
Voltage Gain
Cooling
Weight
Normal Operation at 4Ω/ch(120 VAC)
1% THD 1 kHz
(Typical)
1% THD 1 kHz
(20 Hz–20 kHz)
(for full power @ 8 ohms)
(rear-to-front airflow)
MX 700
MX 1500a
Continuous Average Output Power Per Channel
150W
350W
225W 500W 650W
170W
270W
400W 475W
600W 725W
350W 750W 1000W 1600W
Bridge-Mono Mode Operation
450W
1000W
700W 1500W
±0.5 dB ±0.15 dB ±0.15 dB
0.96 Vrms 1.05 Vrms 1.07 Vrms
35x (31 dB) 50x (34 dB) 56x (35 dB)
2-Speed Fan
25 lb (11.3 kg)
Less than 3.7 A
2-Speed Fan 2-Speed Fan
42 lb (19.1 kg)
Less than 10.5 A
MX 2000a MX 3000a
450W
1300W
2000W
+
1.0 Vrms
80x (38 dB)
Variable Fan
54 lb (24.4 kg)
Less than 12 A
69 lb (31.2 kg)
Less than 12 A
All models All models
Distortion (SMPTE-IM)
Damping Factor
Dynamic Headroom
Noise
Input Impedance
Controls
Less than 0.05%
greater than 200
3 dB at 4 ohms
100 dB below rated output
10 KΩ unbalanced, 20 KΩ balanced
Front: AC Switch, Ch 1 and Ch 2 gain knobs
Back: Parallel/Stereo/Bridge Switch*
Indicators
POWER: Green LED
SIGNAL: Yellow LED, 1 per channel*
CLIP: Red LED, 1 per channel
PROT: Red LED, 1 per channel**
Connectors (each channel)
Input: 1/4” TRS and Barrier strip
Speakers: Touch-proof binding posts
†
Amplifier Protection
Load Protection MX 700
All Others
Output Circuit Type
Full short circuit
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
, open circuit, ultrasonic, and RF protection. Stable into reactive or mismatched loads.
3-Step Class H on MX 3000a
Power Requirements
Dimensions MX 700
MX 1500a
MX 2000a , MX 3000a
*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.
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
800W
1200W
825W
1250W
2400W
3200W
0.15 dB
1675 MacArthur Boulevard • Costa Mesa, CA 92626 •Ph: 800/854-4079 or 714/957-7100 •Fax: 714/754-6174 •
www.qscaudio.com
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