2RU models: RMX 850  |  RMX 1450  |  RMX 1850HD
|  RMX 2450
3RU models: RMX
4050HD  |  RMX 5050

The RMX Series amplifiers give you clean, dynamic
power with the legendary QSC sound quality and reliability that pros
depend on. The RMX Series deliver unmatched performance at a breakthrough
price. And with QSC's free 6 year warranty, the RMX is an even better
value. *

Amplifier
Selector Tool
Need help choosing the right RMX Series amplifier
for your speakers? Select your loudspeakers from over 200 of the most
popular models to find out which amplifier will provide optimal
performance.

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.

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

*
See warranty details

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RMX SERIES AMPLIFIERS

RMX 850

RMX 1450

RMX 1850HD

RMX 2450

RMX
4050HD

RMX
5050

Amplifier
Selector Tool

Dealer
Locator

DOCUMENTS
User Manual (PDF 2.4MB) RMX Specifications (PDF 374K)

WHERE TO BUY
Buy
Online
Hear
it Today at an authorized QSC dealer
Contact a
sales representative

HI-RES IMAGES
RMX 2450 Large Front
RMX 2450 Large Rear
Hi-res RMX Series
Hi-res RMX 2450 Front
Hi-res RMX 2450 Front-Left
Hi-res RMX 2450 Front-Right
Hi-res RMX 2450 Rear

ACCESSORIES
Handle: 2RU
Transformers: 70-Volt Output: OT-300a | OT600

SUPPORT
Factory
Service
Schematics
Service
Manual

RoHS Compliant

Free
6 year Extended Warranty You must register your product on the website
to qualify.

Click Here to
register your RMX amplifier

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

* @ 120VAC, both channels driven; multiply current by 0.5
for 230V units

All Specification Subject to Change
Without Notice.

Speakon is a trademark of
Neutrik

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