QSC RMX 5050a User manual
RMX 4050HD and RMX 5050
User Manual
*TD-000109-01*
TD-000109-01 rev.F
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 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 the lightning flash. Do not touch output
terminals while amplifier power is on. Make all connections with 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- Maximum operating ambient temperature is 50°C (122°F).
8- Never restrict airflow through the device fan or vents. Please insure 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 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 rack, distribute the units evenly. Otherwise, hazardous conditions could be created by an uneven weight distribution.
This amplifier has a serial number located on the rear panel.
Please write this and the model number down and keep them for your records.
Keep your purchase receipt. It is your proof of purchase.
Serial Number:______________________________
Date of Purchase:____________________________
Purchased From:_____________________________
2
© Copyright 2003, 2006, QSC Audio Products, Inc.
QSC® is a registered trademark of QSC Audio Products, Inc. “QSC” and the QSC logo are registered with the U.S. Patent and Trademark Office.
Speakon® is a registered trademark of Neutrik® and the names of Neutrik® products referenced herein are either trademarks and/or service
marks of Neutrik®. All trademarks are the property of their respective owners.
INTRODUCTION
Thank you for purchasing this QSC power amplifier. Please read the following directions to obtain the best results.
Key Features
•2 channels
•XLR, TRS, and barrier strip screw terminal input connectors
•Speakon® and binding post output connectors
•Each channel has independent Clip Limiter and Low Frequency Filter (30 or 50 Hz)
•Stereo, Bridge Mono, and Parallel modes of operation
•QSC reliability
•Complete amplifier protection
CONTROLS, CONNECTORS & FEATURES
(RMX 4050HD shown, RMX 5050 similar)
1- Power On indicator
2- Power switch
3- Cooling air exhaust vents
4- Gain controls
5- Clip and Signal indicators
6- Protect mode indicator
7- Barrier strip input connectors
8- XLR input connectors
9- TRS (1/4”) input connectors
10- Mode switches and settings
11- Cooling air inlet vents
12- Speakon output connectors
13- Binding post output connectors
14- AC circuit breakers
15- Serial number label
16- IEC power inlet (power cord connector)
UNPACKING
Factory packed carton contains:
•RMX amplifier
•User's manual
•Adhesive rubber feet (for non-rack mount applications)
•Rear rack ear mounting kit
•IEC-type detachable power cord
Use the same type carton when shipping the amplifier.
3
RACK MOUNTING
Use four screws and washers to mount the amplifier to the
equipment rack rails. To use the amplifier outside a rack,
attach the self-adhesive rubber feet to the bottom. Use the
rear rack ear support kit to support the rear of the amplifier for
portable use.
When installing equipment into a rack,
distribute the units evenly. Otherwise,
hazardous conditions may be created by
an uneven weight distribution.
COOLING
Air flow in QSC amplifiers: Cool air is drawn into the
rear of the amplifier by the cooling fan. Warm air exits
the front of the amplifier.
Air flows from the rack, into the back of the amplifier, and out the front. This keeps the rack cool. The
fan automatically runs faster when the amp is working hard.
Do not block the front or rear air vents!
AC MAINS
Connect AC power to the IEC socket on the back of
the amplifier. NOTE: Turn off the AC power switch
before connecting AC power.
The correct AC line voltage is shown on
the serial number label, on the rear
panel. Connecting to the wrong line voltage may damage the amplifier or
increase the risk of electric shock.
SETTING THE MODE SWITCHES
The RMX 4050HD and RMX5050 have Mode
switches for Stereo, Parallel, or Bridge Mode. Additionally, each channel has independent Clip Limiting
and Low Frequency (LF) Filtering.
SETTING CLIP LIMITERS
Each channel has a Clip Limiter with its own on-off
switch. The limiter only responds to actual clipping,
and automatically compensates for load and voltage
variations. Clip limiting is generally recommended,
especially to protect high frequency drivers.
4
Set switch to the right to use Clip Limiting.
Switch 1 controls Channel 1.
Switch 10 controls Channel 2.
SELECTING STEREO, PARALLEL, OR
BRIDGE MODE
The amplifier can be set for normal Stereo operation, Parallel input Mode, or Bridge Mono Mode.
Stereo Mode - Switches
4, 5, 6 and 7 are all set to
the LEFT position.
Stereo Mode- Each channel remains independent. The
amplifier may be used for two different signals.
Parallel Mode - This setting connects both inputs
together. One signal feeds both channels. Each channel's
Gain control and loudspeaker connection remain independent.
Bridge Mode- This setting combines both channels into
a single channel with twice the output power. Use only
the first channel's input and Gain control. Set the second
channel's Gain control at minimum. The load must be
rated for the higher output power, and is connected as
shown in the Outputs section.
Do not connect different inputs to each side of a
channel pair when operating in Parallel or
Bridge Mode.
SETTING LOW FREQUENCY FILTERS
Each channel has a 12dB per octave Low Frequency Filter
to prevent cone overexcursion, making more power available for the loudspeaker’s rated frequency range. This
reduces distortion and prevents amplifier overload.
The Filter should only be turned off for driving subwoofers with special low frequency capability. Otherwise,
unless you have filtering in the signal path preceding the
amplifier, use the Low Frequency Filter. The loudspeaker’s
documentation will specify the low frequency limit.
BARRIER STRIP INPUTS
Each channel has a balanced 3-terminal input. Wiring is
connected with simple hand tools, and inputs can be
changed quickly.
Parallel Mode Switches 4, and 5, are
set to the RIGHT position. Switch 6 and 7 are
set to the LEFT position.
Bridge Mode- Switches
4, 5, 6,7 and 8 are all set
to the RIGHT position
and Switch 10 is set to
the LEFT position.
Each channel has its own
switches for LF Filter on/off and
frequency selection.
Channel 1 uses switches 2,3.
Channel 2 uses switches 8,9.
Switches 3 and 8 turn the LF Filter ON. Switches 2 and 9 select
30Hz or 50 Hz.
Balanced inputs: Strip the
wires ¼ inch (6 mm) and
connect to the terminals as
shown. Be sure to tighten
the screws firmly.
The input impedance is 20k ohm balanced or 10k ohm
unbalanced.
Balanced connections are recommended to reduce AC
hum and interference, especially with long cable runs.
Unbalanced connections may be suitable for short cables.
The signal's source impedance should be less than 600
ohms.
If unbalanced connections are required, connect a jumper
wire between the minus (-) terminal and the ground terminal. Then connect the input signal to the positive (+)
terminal and the shield to the minus or ground terminal.
Unbalanced inputs: Strip
the wire ¼ inch and connect a jumper wire
between the minus (-) terminal and the ground terminal. Then connect the
input signal to the positive
(+) terminal and the shield
to the minus or ground terminal, as shown. Be sure
to tighten the screws
firmly.
5
XLR and TRS (1/4”) INPUTS
Each channel has a balanced 3-terminal XLR and TRS input.
Inputs are connected with standard cables and can be
changed quickly. Pinouts are marked on the rear panel and
shown in the illustration.
The input impedance is 20k ohm balanced or 10k ohm unbalanced.
Balanced connections are recommended to reduce AC hum
and interference, especially with long cable runs. Unbalanced
connections may be suitable for short cables. The signal's
source impedance should be less than 600 ohms.
Unbalanced TRS connectors (2-terminal) automatically connect the minus (-) terminal to ground when inserted.
OUTPUTS
Wiring connections are shown on the back of the chassis.
BINDING POST OUTPUTS
Stereo and Parallel Mode: Wire as shown by loudspeaker symbols 1 and 2.
Bridge Mode: Wire as shown by Bridge Mono loudspeaker
symbol.
SPEAKON OUPTPUTS
Each channel accepts a normal 2-wire cable. In addition, Channel 1 accepts 4-wire cables for single cable stereo or bi-amp
connection.
OUTPUT TERMINAL SAFETY WARNING! Do not
touch output terminals while amplifier power is on.
Make all connections with amplifier turned off. Risk
of hazardous energy!
Stereo and Parallel Mode- Connect each loudspeaker to its
own channel of the amplifier, as shown on the left side of the
chassis label. The Mode configuration switches must be set
for Stereo or Parallel Mode.
Bridge Mode- Bridge Mode configures the channel pair to
drive a single audio circuit. The Mode configuration switches
must be set for Bridge Mode.
Connect the load as shown on the right side of the binding
posts or to the left on Channel 1’s Speakon. 4 ohms is the minimum impedance for Bridge Mode use.
Do not use less than 4 ohm load in Bridge Mode!
Note polarity of connection for Bridge Mode.
OUTPUT WIRING WARNING:
CLASS 2 WIRING SHALL BE USED.
FOR BRIDGED MONO MODE, CLASS 3 WIRING
SHALL BE USED.
6
LED INDICATORS
The LED indicators can be used to monitor system operation and identify common problems.
Indicators and Gain controls.
POWER: A single green indicator, on left side of AC power switch.
Normal indication: AC switch ON: indicator will illuminate.
If no indication: Check AC power cord and AC outlet. Check rear panel circuit breakers.
CLIP: red, to the left of each Gain control.
Normal indication: illuminates whenever the amplifier is driven beyond full power. The LED’s brightness indicates the
amount of distortion. Distortion that causes only brief flashing may not be audible.
During muting, the indicator fully illuminates. This occurs during normal “On-Off” muting.
Abnormal indication:
•Bright red illumination while the amp is being used indicates either thermal muting or a shorted output.
•If the amplifier overheats, the fan will run at full speed, and operation should resume within one minute. Allow the fan to
run, and make sure the amplifier ventilation is adequate.
•A shorted or overloaded output circuit will cause excessive Clip flashing and possible overheating.
•If distortion is audible without a Clip indication, the problem is either before or after the amplifier. Check for damaged
speakers or overloaded signal source. The amplifier Gain control should be in the upper half of its range to prevent input overload.
SIGNAL: yellow, to the left of each Gain control.
Normal indication: illuminates when the input signal exceeds -35 dB. As signal approaches full power, the indicator will
illuminate continuously.
If no indication: check Gain settings and increase Gain if necessary. Check input connections and audio source for signal. If
the Clip indicator illuminates with little or no Signal indication, check the output wiring for shorts.
Abnormal indication: If the Signal indicator illuminates with no signal input, there may be system oscillations or some
other malfunction. Disconnect the load and fully reduce the Gain. If the signal indicator remains on, the amp may need servicing.
PROTECT: red, on the right side of Gain control group.
Normal indication: illuminates when the amplifier goes into protective muting. Under normal operation, this indicator will
not be illuminated.
Abnormal indication: If the Protect indicator illuminates, the amplifier is in protective muting. Leave the Power On to allow
the fan to cool the amplifier. Check the rear panel circuit breakers; if either is tripped, reset it by pushing on the center of the
control. When the amplifier has cooled sufficiently, the Protect indicator will extinguish and normal operation will resume.
Note! If both rear panel circuit breakers are tripped, the Protect indicator will not be illuminated.
7
GAIN CONTROLS
Turn the Gain controls clockwise to increase Gain and counterclockwise to decrease Gain. At the maximum setting, the voltage Gain of the amplifier is +36 dB. The RMX 4050HD will
produce 800 watts into 8 ohms when driven with a 1.26V input
signal. The RMX 5050 produce 1050 watts into 8 ohms when
driven with a 1.42V input signal.
The Gain controls are marked in dB of gain. Settings should
normally be made within the upper half of the adjustment
range. The range below 22 dB should not be used for normal
program levels, as the input headroom could be exceeded, but
can be used for testing at reduced levels. At the minimum setting, the signal is completely cut off.
Continuous operation at high power may trigger the
thermal protection circuitry, shutting down the
amplifier and fully illuminating the Protect indicator. Operation will resume after the amplifier has
cooled down sufficiently.
Note! If both rear panel circuit breakers are
tripped, the Protect indicator will not be illuminated.
8
Gain controls and indicators.
SPECIFICATIONS
Output Circuit Type
complementary bipolar output with multi-step high efficiency circuit
Output Power in watts
RMX 4050HD
RMX 5050
FTC: 20 Hz to 20 kHz, 0.1% THD 8 ohms
both channels driven
4 ohms
2 ohms
800
1300
1600
1050
1600
2000
EIA: 1 kHz, 0.1% THD
both channels driven
8 ohms
4 ohms
2 ohms, 1% THD
850
1400
2000
1100
1800
2500
Bridged Mode
at 0.1% THD
8 ohms, 20 Hz to 20 kHz
8 ohms, 1 kHz
4 ohms, 1 kHz, 1% THD
2600
2800
4000
3200
3600
5000
1.25 Vrms
1.42 Vrms
Input Sensitivity for rated power into 8 ohms
Input Impedance
20 k ohm balanced, 10 k ohm unbalanced
Voltage Gain
64x (36 dB) for 8 ohm load
Dynamic Headroom at 4 ohms
2 dB
Distortion, SMPTE
<0.02%
Frequency response at 1 watt
20 Hz to 20 kHz, 8 ohms, LF Filter bypassed: +0, -1 dB
5 Hz to 50 kHz, 8 ohms, LF Filter bypassed: +0, -3 dB
Damping Factor
>250, 8 ohm load
Noise (unweighted)
100 dB below rated output from 20 Hz to 20 kHz, 8 ohm load
Controls
Front Panel- AC power switch, CH1 Gain control, CH2 Gain control
Rear Panel- 10-pole DIP switch featuring LF Filter on/off, LF Filter 30/50 Hz, Clip Limiter on/off controls
for each channel and switches for selecting Stereo, Parallel, or Bridge Mode. Push-button circuit
breaker for each channel.
Connectors
Inputs: XLR female, TRS (1/4-inch), and barrier-strip screw terminals provided for each channel
Outputs: binding posts and Speakon outputs (CH1 Speakon wired for bi-amp connection)
LED Indicators
Power “on”, green; Protect, red; Signal -35 dB, yellow (1 each channel); Clip, red (1 each channel)
Cooling
continuously variable speed fan, rear to front airflow
Amplifier Protection
short circuit, open circuit, thermal, ultrasonic, and RF protection;
stable into reactive/mismatched loads
Load Protection
turn-on and turn-off muting, DC fault output crowbar
Power Requirements
100, 120, or 240 Volts AC (±10%) 50-60 Hertz
Circuit Breakers
RMX 4050HD: two (one for each channel): 100 and 120 V models: 15 amp / 230 V models: 8 amp
RMX 5050: two (one for each channel): 100 and 120 V models: 20 amp / 230 V models: 10 amp
AC Connection
detachable 3-conductor grounded, Class 1 type
Current Consumption at 120V (in amperes) at typical/full/maximum output power (idle current= 1 amp)
8 ohms
4 ohms
2 ohms
RMX 4050HD
typical= 6.4, full= 12.5, maximum= 25.5
typical= 10.0, full= 20.1, maximum= 42.2
typical= 14.5, full= 30.6, maximum= 65.7
RMX 5050
typical= 8.7, full= 17.0, maximum= 34.4
typical= 13.9, full= 26.9, maximum= 56.4
typical= 18.9, full= 38.0, maximum= 84.7
Current Consumption Notes:Typical- 1/8 power, pink noise, represents typical program with occasional clipping. Full- 1/3 power, pink noise, represents severe program with heavy clipping. Maximum- continuous sine wave at 1% clipping.
AC Inlet:
IEC 6032 C13
IEC 6023 C19
Supplied Cord Set
120V: 8ft (2.5m), NEMA 5-15 plug
120V: 8ft(2.5m), NEMA 5-20 plug
230V: 8ft(2.5m), CEE7/7 plug
230V: 8ft(2.5m), CEE7/7 plug
Weight
68 lb. (30.8 kg) net, 77 lb. (34.9 kg) shipping
75 lb. (33.1 kg) net, 87 lb. (37.2 kg) shipping
Dimensions
19.0” wide x 5.2” (3RU) high x 15.9” deep (482x132x404mm)
Specifications are subject to change without notice.
9
WARRANTY INFORMATION & HOW TO CONTACT QSC
Warranty (USA only; other countries, see your dealer or distributor)
Disclaimer
QSC Audio Products, Inc. is not liable for any damage to speakers, or any other equipment that is caused by negligence or improper
installation and/or use of this amplifier product.
QSC Audio Products 3 Year Limited Warranty
QSC Audio Products, Inc. (“QSC”) guarantees its products to be free from defective material and / or workmanship for a period of
three (3) years from 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 or one of our authorized service stations via pre-paid transportation with a copy of proof of purchase (i.e., sales receipt). This warranty provides that the examination
of the return 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. QSC
shall not be liable for incidental and/or consequential damages. This warranty gives you specific legal rights. This limited warranty
is freely transferable during the term of the warranty period.
Customer may have additional rights, which vary from state to state.
In the event that this product was manufactured for export and sale outside of the United States or its territories, then this limited
warranty shall not apply. Removal of the serial number on this product, or purchase of this product from an unauthorized dealer,
will void this limited warranty.
Periodically, this warranty is updated. To obtain the most recent version of QSC's warranty statement, please visit www.qscaudio.com.
Contact us at 800-854-4079 or visit our website at www.qscaudio.com.
Mailing address:
QSC Audio Products, Inc.
1675 MacArthur Boulevard
Costa Mesa, CA 92626-1468 USA
Telephone Numbers:
Main Number (714) 754-6175
Sales & Marketing (714) 957-7100 or toll free (USA only) (800) 854-4079
Customer Service(714) 957-7150 or toll free (USA only) (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]
[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.
©2003, 2006 QSC Audio Products, Inc.
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