QSC RMX850
Muscular Power Plant
The power supply is the heart of an amplifier, converting raw AC power from the
wall to clean DC for the audio circuitry. The RMX uses a powerful high-current
toroidal transformer and ample filter capacitance to ensure generous energy
reserves. This makes a critical difference in sound quality, allowing the amp to
effortlessly punch out high level transients, even when driving abusive 2 ohm
speaker loads.
|
SPECIFICATIONS
|
RMX 850 |
RMX 1450 |
RMX 1850HD |
RMX 2450 |
| |
STEREO MODE (Both Channels
Driven) |
8 ohms
FTC 20 Hz - 20 kHz, 0.1% THD
EIA 1 kHz, 0.1% THD |
185 W
200 W |
260 W
280 W |
350 W
360 W |
450 W
500 W |
4 ohms
FTC 20 Hz - 20 kHz, 0.1% THD
EIA 1 kHz, 0.1% THD |
280 W
300 W |
400 W
450 W |
550 W
600 W |
650 W
750 W |
2 ohms
EIA 1 kHz, 1% THD |
430 W |
700 W |
900 W |
1200 W |
| |
BRIDGE MONO MODE |
8 ohms
FTC 20 Hz - 20 kHz, 0.1% THD
EIA 1 kHz, 0.1% THD |
530 W
600 W |
800 W
900 W |
1100 W
1200 W |
1300 W
1500 W |
4 ohms
EIA 1 kHz, 1% THD |
830 W |
1400 W |
1800 W |
2400 W |
|
Signal to Noise, 20 Hz-20 kHz |
100 dB |
100 dB |
100 dB |
100 dB |
|
Distortion (SMPTE-IM) |
Less than 0.01% |
Less than 0.01% |
Less than 0.02% |
Less than 0.02% |
|
Input Sensitivity @ 8 ohms |
1.15V (+3.4 dBu) |
1.15V (+3.4 dBu) |
1.16V (+3.5 dBu) |
1.23V (+4.0 dBu) |
|
Voltage Gain |
31.6x (30 dB) |
40x (32 dB) |
46x (33 dB) |
50x (34 dB) |
|
Output Circuitry |
AB |
AB |
Class H |
Class H |
Power Requirements
1/8 power pink noise at 4 ohms * |
5A |
6A |
6A |
7A |
| |
ALL MODELS |
Distortion (Typical)
20 Hz - 20 kHz: 10 dB below rated power
1.0 kHz and below: full rated power |
Less than 0.03% THD, 4 and 8 ohms
Less than 0.03% THD, 4 and 8 ohms |
|
Frequency Response |
20 Hz-20 kHz, ±1 dB
-3 dB points: 5 Hz - 50 kHz |
|
Damping Factor, 1 kHz and below |
Greater than 300 at
8 ohms |
|
Input Impedance |
10k ohms unbalanced,
20k ohms balanced |
|
Input Clipping |
10 Vrms (+22 dB) |
|
Cooling |
Continuously
variable-speed fan, rear-to-front air flow |
|
Connectors, each channel |
Input: Active
balanced; barrier strip, XLR and 1/4" (6.3mm)
TRS tip and XLR (pin 2 positive)
Output: touch-proof binding posts and Neutrik® Speakon® |
|
Controls |
Front: AC switch,
Ch. 1 and Ch. 2 gain knobs
Rear: 10-position DIP switch |
|
Indicators |
Power-On: Green LED
Signal: Yellow LED (1 per channel)
Clip: Red LED (1 per channel) |
|
Amplifier Protection |
Stable into reactive
or mismatched loads |
|
Load Protection |
On/off muting, AC
coupling (850, 1450), triac crowbar (1850HD, 2450, on each channel) |
|
Power Requirements |
100, 120, 230 VAC,
50-60 Hz |
|
Dimensions |
19" (48.3 cm) rack
mounting, 3.5" (8.9 cm) tall (2 RU),
15.9" (40 cm) deep (rack mounting to rear support ears) |
|
Weight |
35 lbs (15.9 kg) net |
40 lbs (18.2 kg) net |
44.5 lbs (20.2 kg) net |
44.5 lbs (20.2 kg) net |
Superior Performance
RMX amplifiers deliver true studio-quality sound. A full complementary output
circuit using the highest-grade linear output devices delivers ultra-low
distortion (<0.05% THD) and a ruler-flat frequency response. SMT (Surface Mount
Technology) triples small-signal component density, enabling us to pack up to
2400 watts of power in a chassis only 2 rack spaces and less than 16" deep. And
unlike other designs, RMX output devices are direct-mounted to the heat sink for
optimum thermal coupling and cooling.
Comprehensive Features
The RMX Series is packed full of professional features that increase performance
and flexibility:
The RMX 1850HD provides improved thermal performance that gives you higher
continuous power in 2 ohms stereo or 4 ohms bridged applications (a RMX 1850HD
exclusive!)
Independent defeatable clip limiters reduce distortion without sacrificing peak
performance.
Selectable low-frequency filters boost system response, protect speakers and
ensure low-end tightness by more precisely matching the amplifier's range to the
loudspeakers.
Barrier strip, XLR and 1/4" balanced inputs plus Speakon and binding post
outputs provide easy connections.
Low-noise variable speed fans with rear-to-front air flow keep amplifiers and
racks cool.
Proven Reliability
With over 30 years of building amplifiers for the largest touring companies and
venues around the world, you can count on QSC's reputation for designing the
most reliable amps available.
FEATURES:
- Compact size - up to 2400 watts in 2
rack spaces
- Professional quality performance -
incorporates road-proven QSC designs
- High-current toroidal transformers
for greater two-ohm power and low noise
- Independent user-defeatable clip
limiters reduce distortion
- Selectable low-frequency filters (30
Hz or 50 Hz) protect speakers and increase headroom
- Balanced 1/4" (6.3mm) TRS, XLR and
barrier strip inputs
- Binding post and Neutrik Speakon
outputs
- Front mounted gain controls for easy
access
- Signal and Clip LED indicators to
monitor performance
- Independent DC and thermal overload
protection on each channel automatically protects amplifier and speakers
- 3-year warranty plus optional 3-year
extended service contract
