QSC RMX Series Amplifier User Manual

RMX Series Amplifier
User Manual

¨ RMX 850 ¨ RMX 1450 ¨ RMX 1850HD ¨ RMX 2450

QSC RMX Series Amplifier

Explanation of graphical symbols
The lightning flash with the arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans.
**** The exclamation point within an equilateral triangle is intended to alert the users to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.

CAUTION
RISK OF ELECTRIC SHOCK DO NOT OPEN

CAUTION : To reduce the risk of electric shock, do not remove the cover. No user-serviceable parts inside. Refer servicing to qualified service personnel.
WARNING : To prevent fire or electric shock, do not expose this equipment to rain or moisture.

INTRODUCTION

Model| power 8 ohm/ch 1khz,0.1% THD| power 4 ohm/ch 1khz,0.1% THD| power 2 ohm/ch 1khz,0.1% THD
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RMX 850| 200 W| 300 W| 430 W
RMX 1450| 280 W| 450 W| 700 W
RMX 1850HD| 360 W| 600 W| 900 W
RMX 2450| 500 W| 750 W| 1200 W

The RMX Series Amplifiers.
These rugged fan-cooled, 2-channel, 2-RU amps provide high-value performance and power in a strong, compact chassis. The series comprises four models: the RMX 850, RMX 1450, RMX 1850HD, and RMX 2450.
The HD designation on the RMX 1850HD designates this model as “heavy duty”. The RMX 1850HD is superior to all other RMX models for driving 2-ohm loads for extended periods. The RMX 1850HD is perfectly suited for subwoofer-type applications.

Features

• Independent, user-defeatable clip limiters
• Fully selectable low-frequency filtering; choice of 30 or 50 Hz roll-off
• Stereo (dual-channel), parallel input, or bridged mono operating modes
• Balanced inputs—XLR, ¼” (6.3 mm) TRS, and barrier strip
• Binding post and Neutrik Speakon™ outputs
• Front panel LED indicators for signal and clip

Front panel

1. Power switch
2. POWER indicator LED
3. Cooling vents| 4. Gain control (Channel 1)
5. Gain control (Channel 2)
6. CLIP and SIGNAL indicator
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LEDs, both channels

Rear panel

1. Barrier strip input
2. XLR inputs, Channels 1 and 2
3. Configuration switch
4. Configuration switch chart
5. TRS inputs, Channels 1 and 2
6. Speakon output, Channel 1 plus Channel 2| 7. Speakon output, Channel 2
8. Binding post outputs, Channels 1 and 2
9. Fan
10. Serial number label
11. IEC connector for AC power cable
12. Circuit breaker
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FEATURES & SETUP

Clip limiter
WHAT IT IS
When the audio signal drives the amp’s output circuit beyond its power capability, it clips, flattening the peaks of the waveform. The clip limiter detects this and reduces the gain to minimize the amount of overdrive. To preserve as much of the program dynamics as possible, limiting reduces the average program level until peaks barely clip.
Each channel has its own clip limiter and you can switch it on or off independently, as shown on left.

WHEN TO USE IT (OR NOT)
When driving full-range speakers, clip limiting reduces high-frequency distortion caused by bass overloads.
It also protects higher-frequency drivers from excess overdrive and harsh clipping harmonics.
When driving subwoofers, some users let the amplifier clip without limiting it because it gives extra “punch” to kick drums and similar sounds.
CAUTION : In bi-amp systems, excessive limiting will affect the frequency balance.

Input filter
WHAT IT IS
The low-frequency (LF) filter rolls off signals below either 30 Hz or 50 Hz.
This improves bass performance by limiting sub-audio cone motion, making more power available for the speakers’ rated frequency range.
The filter settings for each channel are controlled individually through the DIP switch settings shown. When the filter is turned off, a 5 Hz roll-off protects against DC or deep sub-audio inputs.

WHEN TO USE IT (OR NOT)
As a rule, your speakers will sound better with proper filtering. Unless you already have filtering in a preceding device, match the setting to the low- frequency rating of your speakers. Vented (bass reflex, ported, etc.) speakers are especially sensitive to cone over-excursion at frequencies below their rated limit.
The 50 Hz filter works well with most compact full-range speakers and has a slight boost at 100 Hz for greater fullness. The 30 Hz filter is intended for subwoofers and large full-range cabinets. The “off” position should be used only for applications such as studio playback monitoring, where you need to know if there are unwanted sub-audio signals present in your mix.

Parallel input mode WHAT IT IS

The “Parallel Input” switches let you operate the amplifier in parallel mode, delivering the same signal to both channels without using a Y-cable. Each channel drives its own
speaker load, with independent gain, filtering, and clip limiting.
Set switch positions 4 and 5 “ON” to couple the inputs together. Turn the switches off for stereo, bi-amping, or other 2-channel modes.
With the inputs in parallel, you can use the other set of input connectors to carry the signal to other amps. This is often called a “daisy chain.”

WHEN TO USE IT
Parallel the inputs when driving two speakers with one input signal (parallel mode) while keeping separate control of both channels’ gain, filtering, and limiting. Use them in bridged mono mode to patch the signal to additional amplifiers through the extra input jacks. See page 12 for an explanation of amp operating modes.
NOTE : If you’re using a balanced signal, use only balanced patch cables; even one unbalanced cable will unbalance the entire signal chain, possibly causing a hum.
NOTE : Turn off the “Parallel Inputs” switches when feeding the amp two separate signals.

Bridge mono mode
WHAT IT IS

To patch the signal to additional amplifiers, use the parallel input switches described on page 10.
Pour amener le signal vers d’autres amplificateurs, suivez les instructions de la page 10.
Um das Eingangs-signal weiteren Verstärkern zur Verfügung zu stellen, verwenden Sie die Parallel Input Schalter wie auf Seite 10 beschrieben.
Para pasar la señal a los amplificadores adicionales utilice el selector de entrada paralela descrito en la página 10.

Bridge mono mode
WHAT IT IS
Bridged mono mode combines the power of both amp channels into one speaker, resulting in twice the voltage swing, four times the peak power, and approximately three times
the sustained power of a single channel. This mode uses Channel 1’s input, gain control, input filter, and clip limiter; Channel 2’s should not be used.

WHEN TO USE IT (OR NOT)
Use bridged mono to deliver the power of both channels to a single 8- or 4-ohm load. Set switch positions 6 and 7 to “BRIDGE MONO ON.” Use Channel 1’s inputs, and connect the speaker as shown.
BRIDGED-MONO PRECAUTIONS:
This mode puts a high demand on the amplifier and speaker, Excessive clipping may cause protective muting or speaker damage. Be sure the speaker has a sufficient power rating. Output voltages greater than 100 volts RMS are available between the bridged terminals of the RMX 2450. CLASS 3 wiring methods (NEC 1999), as specified in
accordance with national and local codes, must be used to connect the speaker.

What are the differences between Stereo, Parallel Input, and Bridge Mono modes?

STEREO MODE

This is the “normal” way of using the amplifier, in which each channel is fully independent. Separate signals connect at the inputs, the gain knobs control their respective channels, and separate speakers connect to each output.

Examples:

• Two-channel (stereo) playback.
• Two independent mono signals, such as main and monitor mixes.
• The bi-amped operation, with the low frequencies in Channel 1 and the highs in Channel 2.

What are the differences between Stereo, Parallel Input, and Bridge Mono modes?
STEREO MODE
This is the “normal” way of using the amplifier, in which each channel is fully independent. Separate signals connect at the inputs, the gain knobs control their respective channels, and separate speakers connect to each output.

Examples:

• Two-channel (stereo) playback.
• Two independent mono signals, such as main and monitor mixes.
• The bi-amped operation, with the low frequencies in Channel 1 and the highs in Channel 2.

PARALLEL INPUT MODE
This mode is just like Stereo mode, except that the inputs for Channel 1 and Channel 2 are internally connected together. A signal into any input jack will therefore drive both channels directly. Each channel’s gain control still functions as usual, and each channel feeds its own speaker load.
You can patch the input signal onto additional amplifiers by using any of the remaining input jacks.
Example:

• One mono signal drives both channels, with independent gain control for each speaker system.

BRIDGE MONO MODE
This mode combines the full power capabilities of both channels into a single speaker system. The amplifier internally re-configures so that both channels operate as a unit. This
delivers double the output voltage, resulting in four times the peak power and three times the sustained power into a single 8- or 4-ohm speaker load. The Bridge Mono mode section on page 11 describes the special speaker connection used.

Examples:

• Driving a single 8-ohm speaker with the combined 4-ohm power of both channels.
• Driving a single 4-ohm speaker with the combined 2-ohm power of both channels.

Precautions:

• Bridge Mono mode makes it possible to drive thousands of watts into a single speaker. AC current consumption will usually be higher. Avoid excessive signal levels, and make sure the wiring and speaker can handle the power.
• If the load is 4 ohms or less and prolonged overloads occur, the amplifier will probably mute for several seconds during peaks, and the circuit breaker may trip.
• Do not use 2-ohm loads.

SEE THE ADDITIONAL BRIDGE MONO MODE WARNINGS ON PAGE 11.

INSTALLATION

Rack mounting of the amplifier is optional.
Use four screws and washers when mounting the amplifier to the front rack rails.
Support the amp at the rear also, especially in mobile and touring use;
rear rack mounting ear kits are available from QSC’s technical services department or by special order from your dealer or distributor.

CONNECTIONS

Inputs
Each channel has active balanced XLR and ¼-inch (6.3 mm) inputs wired in parallel. The input impedance is 20 KW balanced, 10 KW unbalanced.
Balanced signals are less prone to AC hum, but unbalanced signals can be suitable for short cable runs. The signal source’s output impedance should be less than 600W to avoid
high-frequency loss in long cables.
Balanced inputs: Use the XLR or ¼-inch (6.3 mm) TRS input jacks, or the barrier strip.

Unbalanced inputs: Connect the unused side of the balanced input to the ground, as shown below left. A tipsleeve ¼-inch (6.3 mm)connector will correctly terminate the unused
side of the input without modification.
For two-channel (stereo) operation, use the inputs for both Channel 1 and Channel 2; for parallel or bridged mono operation, use the Channel 1 input. See the section on operating modes for more explanation. To patch the audio signal to other amps (parallel and bridged modes only), see the instructions for using parallel inputs on page 9.v

• Balanced
• Unbalanced

Speakon™ Outputs
The RMX amplifier offers a choice of output connections, with two Neutrik NL4MD Speakon jacks and two pairs of “touch-proof” binding posts.
The Speakon connector is designed especially for high-power speaker connections. It locks in place, prevents shock hazards, and assures the correct polarity.
The upper Speakon jack has both Channel 1 and Channel 2 outputs, so it is especially useful for parallel, bi-amp, or bridged mono operation (see bridged mono operating
precautions on page 11). The other Speakon carries only Channel 2’s output.
See the illustrations on the left.
For easier insertion, use the newer style NL4FC Speakon connectors with quick- lock thumb latches.

SPEAKER CABLING
Larger wire sizes and shorter lengths minimize both losses of power and degradation of the damping factor. Do not place speaker cables next to input wiring.
WARNING : To prevent electric shock, do not operate the amplifier with any of the conductor portions of the speaker wire exposed.

Binding post outputs

1. Strip back insulation not more than 13 mm (½ inch).
2. Insert the wire fully so that none of the conductors is exposed; tighten the barrel (use a coin if necessary).
3. Non-European models only.
4. Spade lugs must have insulated barrels to prevent electric shock.

WARNING : To prevent electric shock, do not operate the amplifier with any of the conductor portions of the speaker wire exposed.

Connections for stereo and parallel operations
Connections for bridged mono operation. See bridged mono operating precautions on page 11.
SPEAKER CABLING
Larger wire sizes and shorter lengths minimize both losses of power and degradation of the damping factor. Do not place speaker cables next to input wiring.
Operating voltage (AC mains)
Make sure you connect the amplifier to the correct AC line voltage, which is shown on the serial number label.
Connecting to the wrong line voltage is dangerous and may damage the amplifier.

OPERATION

AC power switch
Before applying power, check all connections and turn down the gain controls.
One second of muting is normal when the amp is turned on or off.

Gain controls
The actual voltage gain of the amplifier is shown in dB.

LED indicators
The yellow SIGNAL LED indicators light at approximately 0.1% of full power.
The red CLIP LED indicator flashes during overload (clipping).
If the amplifier’s protection circuitry triggers protective muting, the SIGNAL and CLIP LEDs will not light. If this occurs during use, see the Troubleshooting section of this manual.

Fan cooling
The fan speed varies automatically to maintain safe internal temperatures. Keep the front and rear vents clear to allow full airflow.
Hot air exhausts out the front of the amp so it does not heat the interior of the rack. Make sure that plenty of cool air can enter the rack, especially if there are other units that exhaust hot air into it.

Safe operating levels
The amp’s protective muting system guards against excessive internal temperatures. With normal ventilation and 4- to 8-ohm loads, the amplifier will handle any signal level including overdrive—but make sure that the speakers can handle the full power! However, lower load impedances and higher signal levels produce more internal heating. Into
2-ohm loads, frequent or prolonged clipping (indicated by constant flashing of the red CLIP LED) may trigger protective muting.
Bridged mono mode doubles the output impedance of the amp; 4 ohms is the minimum load impedance. Heavy clipping may cause muting. If this happens, see Troubleshooting, page 23.

APPLICATIONS

Sound reinforcement

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Instrument amplification

TROUBLESHOOTING

Problem: no sound
INDICA TION: POWER
INDICATOR NOT LIT

• Check the AC plug. Also, check the circuit breaker on the rear panel.
• Confirm that the AC outlet works by plugging in another device. If too many amplifiers are used on one outlet, the building’s circuit breaker may trip and shut off the power.
• An overload in bridged mono mode may cause the amplifier to click off for several seconds. Check the load impedance (4 ohms minimum), or reduce the signal level.
• An amplifier that keeps shutting off may have a serious internal fault. Turn it off, remove the AC power, and have the amplifier serviced by a qualified technician.

INDICA TION: SIGNAL-LED RESPONDING TO SIGNAL LEVEL

• If the yellow SIGNAL indicators are lighting normally, the fault is somewhere between the amp and the speaker. Check the speaker wiring for breaks. Try another speaker and cable.

No sound (continued)
INDICA TION: SIGNAL LED
NOT LIT

• If the green POWER indicator LED is lit and the fan is running, yet the signal LEDs indicate no signal, check the input. Make sure the signal source is operating and try another input cable. Connect the source to another channel or amplifier to confirm its operation.
• Overheating will cause protective muting. The fan will be running at full speed and the chassis will be hot to the touch; the sound should resume within a minute as the amplifier cools to a safe operating temperature. Check for proper ventilation. If the fan isn’t running at all, the amplifier requires servicing.

INDICA TION: CLIP-LED FLASHING

• If the red CLIP indicator flashes when the signal is applied, the amplifier output may be shorted.
  Check the speaker wiring for stray strands or breaks in the insulation.

Problem: no sound
INDICA TION: CLIP LEDs
BRIGHT AND STEADY
The amplifier is in protective muting.

• One second of muting is normal when the amp is turned on or off.
• Overheating will cause protective muting. The fan will be running at full speed and the chassis will be hot to the touch; the sound should resume within a minute as the
  amplifier cools to a safe operating temperature. Check for proper ventilation. If the fan isn’t running at all, the amplifier requires servicing.

Problem: distorted sound
INDICA TION: CLIP LED
FLASHING

• If the red CLIP indicator flashes before the signal indicator do, the load impedance is abnormally low or shorted. Unplug each speaker one by one at the amplifier. If the
  CLIP LED goes out when you disconnect a cable, that cable or speaker is shorted. Try another cable and speaker to locate the fault.

INDICA TION: CLIP INDICATOR NOT FLASHING

• This could be caused by a faulty speaker or a loose connection. Check the wiring and try another speaker.
• The signal source may be clipping. Keep the amplifier gain controls at least halfway up so that the source does not have to be overdriven.

Problem: no channel separation

• Check the switch settings on the back of the amplifier. Make sure the “Parallel Input” and “Bridge Mode” switches are OFF in dual-channel, bi-amp, or stereo use where different signals go to each channel.
• Make sure other equipment in the signal path, such as mixers, preamps, etc., are set for stereo, not mono.

Problem: hum

• Move cabling and signal sources to identify “hot spots” in the system. Cables with faulty shielding are a frequent entry point for hum.
  Problem: hiss

• Unplug the amplifier input to confirm that the hiss is coming from the source or a device upstream; erratic or popping noises indicate an electronic fault in the offending unit.

• To keep the normal noise floor low, operate the primary signal source at full level, without clipping, and avoid boosting the signal further between the source and the amplifier.
  Problem: squeals and feedback

• Microphone feedback should be controlled with mixer controls. If noise continues to build up with zero mic gain, there is a serious fault in the signal processors or cables. Working in succession from the signal source towards the amplifier, check each device in the signal path by reducing its gain or unplugging it.

SPECIFICATIONS

OUTPUT POWER in watts
FTC: 20 Hz–20 kHz @ 0.1% THD, both channels driven
8 ohms per channel
4 ohms per channel
EIA: 1 kHz @ 0.1% THD, both channels driven
8 ohms per channel
4 ohms per channel
1 kHz @ 1% THD, typical, both channels driven
2 ohms per channel
Bridge Mono:
8 ohms, 20 Hz–20 kHz, 0.1% THD
8 ohms, 1 kHz, 0.1% THD
4 ohms, 1 kHz, 1% THD, typical

DYNAMIC HEADROOM
DISTORTION
SMPTE-IM
FREQUENCY RESPONSE20 Hz–20 kHz, +0/-1 dB
(at 10 dB below rated output power)
DAMPING FACTOR
NOISE (unweighted 20 Hz to 20 kHz, below-rated output)
VOLTAGE GAIN
INPUT SENSITIVITY, V RMS
full rated power @ 8 ohms
INPUT IMPEDANCE (all models)
CONTROLS (all models)
INDICATORS (all models)
CONNECTORS (all models)
COOLING (all models)
AMPLIFIER PROTECTION (all models)

10K ohms unbalanced
20K ohms balanced
Front: AC switch, Ch. 1 and Ch. 2 gain
Rear: 10-position DIP switch
POWER: Green LED
CLIP: Red LED, 1 per channel
SIGNAL: Yellow LED, 1 per channel
Input: Active balanced; XLR and ¼” (6.3 mm) TRS, tip and pin 2 positive, and barrier strip
Output: “Touch-Proof” binding posts and Neutrik Speakon™
Continuously variable speed fan, back-to-front air flow Full short circuit, open circuit, thermal, ultrasonic, and RF protection Stable into reactive or mismatched loads

LOAD PROTECTION
OUTPUT CIRCUIT TYPE AB
DIMENSIONS (all models)
WEIGHT Shipping:
Net:
POWER REQUIREMENTS

Turn-on/turn-off muting
AC Coupling| Turn-on/turn-off muting
AC coupling| Turn-on/turn-off muting
Triac crowbar (on each channel)| Turn-on/turn-off muting
Triac crowbar (on each channel)
AB| AB| H| H
AB: Class AB complementary linear output
H: Class AB complementary linear output with Class H 2-step high-efficiency circuit
19.0″ (48.3 cm) wide, 3.5″ (8.9 cm) tall (2 rack spaces)
15.9″ (40 cm) deep (rack mounting to rear support ears)
41 lb. (18.6 kg)| 46 lb. (20.9 kg)| 50.5 lb. (23 kg)| 50.5 lb. (23 kg)
35 lb. (15.9 kg)| 40 lb. (18.2 kg)| 44.5 lb. (20.2 kg)| 44.5 lb. (20.2 kg)
 As printed on the rear panel Serial Number label. Available for 100, 120, or 220–240 VAC, 50/60 Hz
| | |
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POWER CONSUMPTION NOTES

1. 1/8 power with pink noise represents a typical program with occasional clipping.
2. 1/3 power with pink noise represents a severe program with heavy clipping.
3. Continuous sine wave at 1% THD clipping.

• Thermal or overcurrent cutback limits duration.

WARRANTY INFORMATION

(USA only; see your dealer or distributor)
Disclaimer
QSC Audio Products, Inc. is not liable for any damage to speakers, amplifiers, or any other equipment that is caused by negligence or proper installation and/or use of
the RMX amplifier.
Product Warranty
QSC guarantees the RMX to be free from defective material and/or workmanship for a period of three years from the date of sale and will replace defective parts and repair
malfunctioning products under this warranty when the defect occurs under normal installation and use— provided the unit is returned to our factory via prepaid transportation
with a copy of the proof of purchase, i.e., a sales receipt. This warranty provides that examination of the returned product must indicate, in our judgment, a manufacturing defect. This warranty does not extend to any product which has been subjected to misuse, neglect, accident, improper installation, or where the date code has been removed or defaced.

ADDRESS & TELEPHONE INFORMATION

Mailing address

QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA

Telephone Numbers

Main Number +714-754-6175
Sales Direct Line +714-957-7100
Sales & Marketing  800-854-4079
Customer Service  +714-957-7150 800-772-2834

Facsimile Numbers

Sales & Marketing FAX +714-754-6174
Customer Service FAX +714-754-6173

World Wide Web:www.qscaudio.com
E-mail:[email protected] tech_[email protected]

QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA
“QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.
©1999, 2001 QSC Audio Products, Inc.

Important Safety Precautions & Explanation of Symbols

WARNING!

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER.
NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

The lightning flash with the arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous” voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans.
The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in this manual.
**** The lightning flashes printed next to the output terminals of the amplifier are intended to alert the user to the risk of hazardous energy. Output connectors that could pose a risk are marked with lightning flashes. Do not touch output terminals while the amplifier power is on. Make all connections with the amplifier turned off.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. WARNING: To prevent fire or electric shock, do not expose this equipment to rain or moisture. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. The maximum operating ambient temperature is 50°C (122°F).

8. Never restrict airflow through the device fan or vents. Please ensure that the air intake and exhaust vents are unobstructed.

9. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

10. Do not defeat the safety purpose of the grounding-type plug. The grounding plug has two blades and a grounding prong. The third prong is provided for your safety.
    If the provided plug does not fit your outlet, consult an electrician for the replacement of the obsolete outlet. Do not cut off the grounding prong or use an adapter that
    breaks the grounding circuit. This apparatus must be properly grounded for your safety.

11.  Protect the power cord from being walked on or pinched, particularly plugs, convenience receptacles, and the point where they exit from the apparatus.

12. This product is not equipped with an all-pole mains switch. To fully disconnect from the AC mains, the AC plug must be removed from the AC outlet or the appliance
    coupler (IEC block) must be removed from the amplifier module. Ensure either the AC line cord plug or the appliance coupler are accessible in case of emergency
    disconnect requirement.

13. Connect the unit only to a properly rated supply circuit.

14. Reliable Earthing (Grounding) of rack-mounted equipment should be maintained.

15. Use only attachments/accessories specified by QSC Audio Products, Inc.

16. Unplug the apparatus during lightning storms or when unused for long periods of time.

17. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as a power supply cord or plug is
    damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been
    dropped.

18. The appliance shall not be exposed to dripping or splashing and no objects filled with liquids, such as vases, shall be placed on the apparatus.

19. When installing equipment into the rack, distribute the units evenly. Otherwise, hazardous conditions could be created by uneven weight distribution.

TD-000231-00 revA
Rack Mounted Amplifier Safety Insert
©2006 QSC Audio Products, Inc.
QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626 USA

Documents / Resources

| QSC QSC RMX Series Amplifier [pdf] User Manual
RMX 850, RMX 1450, RMX 1850HD, RMX 2450, QSC RMX Series Amplifier, QSC RMX Series, RMX Series Amplifier, QCS Amplifier, Amplifier
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References

• QSC Pro Audio

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