Roxy RX-1100 User manual

Professional Amplifier
R X S E R I E S
RX-500/RX-900
OWNER'S MANUAL
ROXY
/RX-1100

OWNER'S MANUAL
The information contained in this manual is subject to change without notice.
No part of this manual may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying and recording of any kind.
POWER AMPLIFIERS
ROXY
ROXY
ROXY
RX-500/RX-900/RX-1100
RX-500
RX-900
RX-1100

Products
Service Information Form
Owner's Name:
Shipping address:
Street:
City:
Zip Code:
Country:
Phone Number: Fax Number:
Email:
MODEL: SERIAL:
NUMBER:
Place of Purchase:
Name of Dealer:
Full Address:
DATE OF PURCHASE:
Nature of the problem
(Be sure to describe the conditions that existed when the problem
occurred and what attempts were made to correct it.)
Other equipment in your system
If warranty has expired, payment method: Cash Check Visa Master
card number: Signature:
Enclose this form with the defective unit. Do not mail separately.

RX SERIES
LIMITED WARRANTY
THE WARRANTY
For a period of one (1) year from the date of delivery to the original purchaser (as shown on the original
invoice or sales receipt), The company warrants to the ORIGINAL OWNER of each new product
(provided it was purchased at an Authorized The company Dealer) that it is free of defects in materials
and workmanship and that each product will meet or exceed all factory published specifications for each
respective model. The company agrees to repair or replace (at its discretion) all defective parts at no
charge for labor or materials; subject to following provisions:
WARRANTY VIOLATIONS
The company shall take no responsibility for repair or replacement as specified under this warranty, if
the damaged product has been subject to misuse, accident, neglect or failure to comply with normal
maintenance procedures; or if the serial number has been defaced, altered or removed. Nor will The
company accept responsibility for, or resulting from, improper alterations or unauthorized parts or
repairs. This warranty does not cover any damage to speakers or any other consequential damage
resulting from breach of any written or implied warranty.
The company WARRANTY PROVISIONS
The company will remedy any defect, regardless of the reason for failure (except as excluded ) by repair, or
replacement. The company will remedy the defect and ship the product within a reasonable time after
receipt of the defective product at an The company Authorized Service Center.
TO OBTAIN WARRANTY SERVICE
In the event that an The company product requires service, the Owner must contact The company or an
Authorized The company Service Center to receive an R.A.N. ( Return Authorization Number) and
instructions on how to return the product to the the company Authorized Service Center, or to the factory. The
company (or its Authorized Service Center) will initiate corrective repairs upon receipt of the returned
product. Please save original carton and all the packing materials in case shipping is required. All products
being returned to the factory or service center for repairs must be shipped pre-paid.
If the repairs made by The company or the the company Authorized Service Center are not satisfactory,
Owner is instructed to give written notice to the company . If the defect or malfunction remains after a
reasonable amount of attempts by the company to remedy the defect or malfunction, the Owner shall
then have the option to elect either a refund or replacement of said the company product free of charge.
The refund shall be an amount equal to but not greater than the actual purchase price, not including any
taxes, interest, insurance, closing costs and other finance charges (minus reasonable depreciation on
the product). If a refund is necessary, the Owner must make the defective or malfunctioning product
available to the company free and clear of all liens or other restrictions.
MODIFICATIONS OF EQUIPMENTMA
The company reserves the right to modify or change equipment (in whole or part) at any time prior to delivery
thereof, in order to include therein electrical or mechanical improvements deemed appropriate by The
company ; but without incurring any liability to modify or change any equipment previously delivered, or to
supply new equipment in accordance with any earlier specifications.
DISCLAIMER OF CONSEQUENTIAL AND INCIDENTAL DAMAGES
YOU, THE OWNER, ARE NOT ENTITLED TO RECOVER FROM THE COMPANY ANY INCIDENTAL
DAMAGES RESULTING FROM ANY DEFECT IN THE COMPANY PRODUCT. THIS INCLUDES ANY
DAMAGE TO ANOTHER PRODUCT OR PRODUCTS RESULTING FROM SUCH A DEFECT.
WARRANTY ALTERATIONS
No person has the authority to enlarge, amend, or modify this Warranty. This Warranty is not extended by the
length of time which the Owner is deprived of the use of product. Repairs and replacement parts provided
pursuant to the Warranty shall carry only the non-expired portion of the Warranty.
THIS STATEMENT OF WARRANTY SUPERSEDES ALL OTHERS CONTAINED IN THIS MANUAL
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Professional Amplifier

The information furnished in this manual does not include all of the details of
design and engineering of this particular product; not does it cover every
possible application or situation concerning its usage, which may occur during
the installation, operation or maintenance of said the company product.
IMPORTANT
THE PRODUCT REQUIRES CLASS 2 OUTPUT WIRING.
WARNING
TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOISTURE!
Magnetic Field
CAUTION: Do not locate sensitive high-gain equipment such as preamplifiers or
tape decks directly above or below this unit. Because this amplifier has a high
power density, it has a strong magnetic field which can induce hum into
unshielded devices that are located nearby. This field is strongest just above and
below the unit. If an equipment rack is used, we recommend locating the
amplifier(s) at the bottom of the rack and the preamplifier or other sensitive
equipment at the top.
To prevent electric shock, do not remove top or bottom covers. No user
serviceable parts inside. Refer servicing to qualified service personnel.
Disconnect power cord before removing rear panel cover to access gain
switch.
Shock Hazard - Do Not Enter Choc Hasard - N*entrent
Schocke Hazard - Test Nicht Urto Hazard - Do Non Entrano
Betrete
The exclamation point triangle is used to alert the user to important operating
and/or maintenance instructions.
Printed on recycled paper.
The lightning bolt triangle is used alert the user to the risk of electric shock
RX SERIES
Page 2 User's Manual
Professional Amplifier
CAUTION
5 Service
This unit has very sophisticated circuitry and should only be serviced by a fully trained technician.
This is why each unit bears the following label:
To prevent electric shock, do not remove covers. No user serviceable parts inside. Refer
servicing to a qualified technician.
5.1 Worldwide Service
Service may be obtained from your local authorized service center. To obtain service, simply
present your sales receipt as proof of purchase along with the defective unit to an authorized
service center. They will handle the necessary paperwork and repair. Remember to transport your
unit in the original factory packaging.
1. When sending a product to the authorized service center for service, be sure to fill out the
service information form that is enclosed at the end of this manual and include it inside your
unit's shipping pack. Do not send the service information form separately.
2. To ensure the safe transportation of your unit to the authorized service center, ship it in an
original factory-packing container.
3. Do not ship the unit in any kind of rack. Ignoring this warning may result in extensive damage to
the unit and the equipment rack. Accessories are not needed. Do not send the instruction
manual, cables and any other hardware.
Professional Amplifier
CAUTION
RX SERIES
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In an effort to provide you with as much information as possible about
the high power-producing capabilities of your amplifier, we have
created the following power matrices:
4- ohm mode
8- ohm mode
8-ohm bridging mode
4-ohm bridging mode
20Hz-20kHz+3/-0dB
>95dB
+/0.1degrees from 10Hz to 20kHz at 1 watt
483x364x89(mm)
Dimensions(mm)
Main power supply
N.W
W.G
RX-500 RX-900
Frequency response
Model
Cross talk
Phase response
S/N
IMD
THD
Damping Factor
Slew Rate
input impedance
RX SERIES
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Professional Amplifier
~220V
50/60Hz
~220V
50/60Hz
17.25kg
20.7kg
~220V
50/60Hz
483x415x89(mm)
10K/20K ohms, unbalanced or balanced
36v/Μ )s (Stereo
>800@1kHz/8 ohms
≤0.01% Rated Power@8Ω 1kHZ
≤0.01% Rated Power@8Ω
>50dB
4. Specifications 10
5. Service 11
2. Installation
2.1 Stereo 5
2.2 Mono 6
2.3 Additional Load Protection 6
2.4 Required AC Mains 6
3. Operation
3.1 Precautions 7
3.2 Power Indicator 7
3.3 Protection Systems 7
3.3.1 Drive Protection 7
3.3.2 Transformer thermal Protection 7
3.3.3 Signal Limiting Circuit 8
CONTENTS
1. Welcome
1.1 Unpacking 4
1.2 Features 4
RX SERIES
Professional Amplifier Page 3 User's Manual
RX-1100
500+500W
800+800W 900+900W
1400+1400W
1800W
2400W
1100+1100W
2000+2000W
2200W
3600W
1000W
1500W
19.00kg
22.4kg
23.00kg
26.4kg

Stereo/Mono:A three-position back panel switch is used to select Stereo, Bridge-Mono or
Parallel-Mono mode.
Input/Output Data
Input Connector: Balanced XLR connector.
Input Impedance: Nominally 20k ohms, balanced; 10 k ohms, unbalanced.
Output Connector: Two sets of color-coded 5-way binding posts (for banana plugs, spade lugs or
bare wire) and two sets of speakon connectors.
Output Impedance: Less than 10 milliohms in series with less than 2 microhenries.
DC Output Offset: Less than 10 millivolts.
Output Signal Modes
Stereo: Balanced, two-channel.
Bridge-Mono: Balanced, single-channel. Channel 1 inputs are active; Both channel volume
controls are available.
Parallel-Mono: Balanced, single-channel. Channel 1 inputs are active; Both channel volume
controls are available.
Protection: RX Series amplifiers are protected against shorted circuits or mismatched loads,
overloaded power supplies, excessive temperature, chain destruction phenomena, input
overload and high frequency blowups. They also protect loudspeakers from input and output DC
and provide protection from turn-on/turn-off transients.
If operating conditions are unreasonable, the patented circuitry proportionally limits the drive level
to protect the output transistors, particularly in the case of elevated temperature. A thermal switch
imbedded on the heat-sink protects the output device from overload. In the rare event that a
transformer overheats, the thermal switch turns the power off, waits until the unit has cooled to a
safe temperature and then resets itself.
Turn On: Five second delay with no dangerous transients. Contact Audio Inc. if
you need to change the delay.
Construction
Durable black finish on steel chassis with special "flow-through" ventilation from rear panel to front
panels.
Cooling: Internal heat sinks and two 80mm high speed low noise cooling fan with auto speed-
control forced-air cooling for rapid, uniform heat dissipation.
Dimensions: Standard 56 cm rack mount width (ElA RS-310-B), 15 cm height and 47 cm depth
behind the mounting surface.
Approximate Weight: Center of gravity is 10 inches (25.42 cm) behind front mounting surface.
the company
1 Welcome
Thank you for choosing the company. Audio Inc. professional audio product. You have joined a
growing group of audio professionals who have turned to the company. for the most advanced
audio amplification products available. So welcome to the company family! All the company
products have been designed, engineered and manufactured to meet the demands of even the
most critical sound reinforcement professional.
Please read this manual carefully. It contains important and helpful information to enable you to get
the maximum performance out of your new product. If you plan to use this amplifier in either of the 2
available Mono modes, please refer to section 2.2.
1.1 Unpacking
Please unpack and inspect your new amplifier for any damage that may have occurred during
transit. If damage is found, notify the Transportation Company immediately. Only you, the
consignee, may initiate a claim with the carrier for damage which occurred during shipment.
Remember to save all packing materials in the unlikely event your unit should ever need to be
returned to the factory for service of any kind.
1.2 Features
Rugged, road-worthy professional power amplifier. E.I.A. Standard 19" (48.3cm) rack-
mountable chassis.
RX Series "Class H " circuitry generates large voltage swings while avoiding electrical stress on
the output stages. This results in low distortion and high reliability.
□ Front panel power switch with turn-on delay for loudspeaker protection.
□ Patented Output Device Emulation Protection keeps the amplifier working under extreme
conditions.
□ High damping factor provides superior control over low frequency drivers for a clean, accurate
low end.
□Safe with any load. Bridge-Mono and Parallel-Mono modes offer optimal load-matching
performance.
□Complete protection against shorted outputs, mismatched loads, overheating, DC input/output
and high frequency overload, full internal fault protection.
□
□
Power
cord
Binding Post and Speakon
Output Connectors
1-Ch.1 Output Input
2-Ch.2 Output Input
MODE SWITCH
Ch.1 Level Control
Power Switch
Ch.2 Level Control
RX -7 00
Indicators
RX SERIES RX SERIES
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□
□
□
Balanced XLR inputs with balanced direct XLR output. Optional barrier block input connectors
are available with the PM-BB accessories.
Efficient heat sinks and self-contained forced air cooling system, dissipate heat quickly and
evenly for extra amplifier protection and greater power output.
One year "no-fault" full warranty and guaranteed specifications protect your investment.
2 Installation
Always reduce volume by turning level controls fully counterclockwise when either connecting or
disconnecting cables to the amplifier. This reduces the chance of an audio "spike" that could
possibly cause loudspeaker damage.
The guidelines below are provided to help you get your amplifier installed and ready to go quickly
and easily. Be sure to follow the instructions in Sections 2.1 and 2.2 for the selected mode of
operation. Additional information on input sensitivity, load protection and required AC mains is
provided in Section 2.3.
1. Install the amplifier in a standard 19-inch (48.3 cm) rack, or place it on a stable surface. The
mounting dimensions are 19-inch (48.3 cm) wide, 3.5-inch (8.9 cm) tall and 17.7-inch (44.9 cm)
deep behind the mounting surface.
IMPORTANT! ALLOW FOR ADEQUATE VENTILATION.
AMPLIFIER
(TOP VIEW)
IMPORTANT: Be sure the back of
the amplifier is supported
AIR FLOW
AIR FLOW
AIR FLOW AIR FLOW
43.5cm
44.9cm
FRONT OF AMPLIFIER
Fig.2.4 Do Not Block Air Flow
2. Use high-quality loudspeaker cables to connect the load to the amplifier's outputs. Do not use
shielded cable.
3. Use shielded cables to connect audio sources to the amplifier's inputs. Either balanced or
unbalanced wiring can be used as shown below.(Barrier block input connectors are available
with the MP-BB accessories).
BALANCED
1
23
GND
+
SHIELD
+
INPUT
FROM
PREAMPLIFIER INPUT
2
1
SHIELD
PREAMPLIFIER
UNBALANCED
+
SHIELD
+
3
FROM
-
-
It is very unlikely that your RX Series amplifier will ever activate its Transformer Thermal
Protection as long as it is operated within rated conditions.
3.3.3 Signal Limiting Circuit
This internal limiting circuit automatically reduce gain because of a significant deviation between
input and output signal flow, preventing occurrence of gross non-linearity conditions inside the
amplifier caused by overdrive, overload or defect, and keeps the signal shape unaltered under any
conditions. The circuit keep signal flow distortion under 0.5%, and thus guarantees clean sound
and effective speakon protection.
4 Specifications
All amplifier specifications apply to the following settings: Stereo mode with 8-ohm loads and an
input sensitivity of 32dB, unless otherwise specified.
Power Specification
Output Power: The following specifications are guaranteed minimums for standard 1 kHz power.
For more information, see the power matrix in Figures 3.1 through 3.2 (maximum average power
@ 0.1% THD +N).
Load Impedance: Safe with all types of loads. Rated at 4 to 8 ohms in Stereo, 4 to 8ohms in
Bridge-Mono and 4 to 8 ohms in Parallel-Mono mode.
Required AC Mains: Current, frequency and voltage requirements are provided on each unit's
back panel. All models draw 90 Watts or less at idle.
RX-300: (220/50Hz)
Draws up to 8 amps of current.
RX-500: (220/50Hz)
Draws up to 12 amps of current.
RX-700: (220/50Hz)
Draws up to 16 amps of current.
AC Connector: An appropriate AC line cord and plug are provided. 110/220 VAC, 50Hz/60Hz
units have a standard 3-wire, 15-amp grounded connector (NAME 5-15P).
Controls
Power: A front panel rocker switch is used to turn the amplifier on and off.
Level: A front panel rotary potentiometer for each channel is used to control the output level.
Fig.2.2 TPC
Fan speed
DMX. fan speed
Temperature Protect Circuit (TPC)
Automatic
c
c
c
0
20
10
c
c
c
c
40
30
60
50
Min. fan speed,
TPC normal
At 75°C
60
Heatsink temperature
c
c
c
80
70
90
Amplifier: PM Series
TPC Limiter active
C
80 C
90 Mute the signal
Out put the signal
C
Fig.2.1 Front Panel Level Control
CHANNEL 1
LEVEL CONTROL CHANNEL 2
LEVEL CONTROL
The following diagram illustrates the actions
taken by the Thermal Management System:
RX SERIES RX SERIES
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Professional Amplifier Professional Amplifier

2.1 Stereo
1. Turn down the level controls (fully counterclockwise) and turn off the amplifier.
2. Set the back panel Stereo/Mono switch to Stereo.
3. Connect the input and output cables .
4. Turn on the amplifier and adjust the level for each channel using the front panel level controls.
2.2 Mono
Your amplifier's Mono modes provide double the power of the Stereo mode in a single channel. In
Bridge-Mono mode, the outputs are wired for twice the output voltage. In Parallel-Mono mode, the
inputs are paralleled to link the two channels. Bridge-Mono mode is provided for loads with
impedance greater than 4 Ohms. Parallel-Mono mode should be used with loads of 4 Ohms .
Bridge-Mono
1. Turn down the level controls (fully counterclockwise) and turn off the amplifier.
2. Set the back panel Stereo/Mono switch to Bridge-Mono.
3. Connect the input and output cables. Only channel 1 input is used.
4. Make sure the load is balanced (neither side shorted to ground) and do not use the black (-)
binding posts.
5. Turn on the amplifier and adjust both level controls.
Parallel-Mono
1. Turn down the level controls (fully counterclockwise) and turn off the amplifier.
2. Set the back panel Stereo/Mono switch to Parallel-Mono.
3. Connect the input and output cables as shown in the Only channel input is used.
4. Turn on the amplifier and adjust both level controls.
CAUTION: Never strap the two red output terminals together (in parallel). Never connect
either red output terminal to chassis ground.
IMPORTANT: The channel 2 level control will remain illuminated when operating in
Parallel/Mono mode.
2.3 Additional Load Protection
To protect against excessive power, a fuse can be added in series with each loudspeaker
cable. A single fuse can protect the entire system, or can be used for each driver. High frequency
drivers (tweeters) are usually more sensitive to large voltage peaks, while low-frequency drivers
(woofers) are typically most sensitive to the heat from average RMS output power. To protect your
tweeters, we recommend that you use a high-speed instrument fuse like the Little fuse 361000
series. To protect your woofers, we recommend using a slow-blow fuse that more closely
represents the thermal response of your woofer. Use Figure 2-6 to find the correct value for either
type of fuse.
2.4 Required AC Mains
All RX Series amplifiers are shipped with an appropriate line cord and plug. When possible, use
a power receptacle on a dedicated circuit; and always, make sure it will provide the correct voltage
and sufficient current. We do not recommend operating your amplifier with voltages greater than
10% above or below the unit's rated voltage. For example, if your amplifier is rated for 220 VAC, the
line voltage should not exceed 240 VAC.
CAUTION: Connect unit only to a proper supply. Use only three wire cord which is provided with
unit.
3 Operation
3.1 Precautions
Although your amplifier is protected from external faults, the following safety precautions are
recommended:
1. There are important differences among the Stereo, Bridge-Mono and Parallel-Mono operating
modes. Please refer to Section 2 for additional information.
2. WARNING: Do not change the position of the stereo/mono switch unless the amplifier is
first turned off .
CAUTION: Never strap the two red output terminals together (in parallel). Never connect
either red output terminal to chassis ground.
Also, make sure the Stereo/Mono switch is set to the proper position.
3. Use care when making connections, selecting signal sources and controlling the output level.
4. Do not short the ground lead of an output cable to the input signal ground. This will form a
ground loop and may cause oscillations.
5. Do not operate the amplifier from AC mains in excess of 10% variation above or below the
selected line voltage, and only at the specified line frequency.
6. Never connect the output to a power supply output, battery or power main. Such connections
may result in electrical shock.
7. Tampering with circuitry by unqualified personnel or making unauthorized circuit changes may
be hazardous and invalidates warranty.
Remember is not liable for any damage that results from over driving other system
components.
3.2 Power Indicator
When illuminated, the green power indicator (the volume control) shows that the amplifier has
been turned on. It is driven only by the low-voltage power supply and does not indicate the
status of the high-voltage supply.
3.3 Protection Systems
RX Series amplifiers have extensive protection systems, including TPC, protection, drive
protection, transformer thermal protection, and fuses or circuit breakers that protect the power
supplies.
3.3.1 Drive Protection
The Drive Protection System temporarily removes output drive to protect the amplifier and its
loads. Drive Protection System can be activated in two situations. First, if dangerous subsonic
frequencies or direct current (DC) is detected in the amplifier's output, the unit will activate its
DC/low-frequency protection circuitry, which puts the amplifier in Drive Protection mode. This
mode protects the loads and prevents oscillations. The unit resumes normal operation as soon
as the amplifier no longer detects dangerous output. Although it is extremely unlikely that the
DC/low-frequency protection system will ever be activated, improper source materials like
subsonic square waves or input over-loads, that excessively clip the input signal, can activate
this system.
The amplifier's protection system will activate the amplifier's Drive Protection mode in rare
situations where heavy common-mode current is detected in the output. The unit should
never output heavy common-mode current unless its circuitry is damaged. Activating Drive
Protection mode helps prevent further damage.
3.3.2 Transformer Thermal Protection
All RX Series amplifiers have Transformer Thermal Protection. This protection is activated
in unusual situations where the unit's transformer temperature rises to unsafe levels. Under
these abnormal conditions, the unit will removes output drive to protect amplifier.. The fan
will continue to run in all units. The amplifier will return to normal after it cools to a safe
temperature.
RX SERIES RX SERIES
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