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Aero 8A
User Manual
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D.A.S. Aero 8A User Manual

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Page 1
Manual de Usuario / User’s Manual
æro 8A
Antes de utilizar el equipo, lea la sección “Precauciones de seguridad” de este manual. Conserve este manual para futuras consultas.
Before operating the device, please read the “Safety precautions” section of this manual. Retain this manual for future reference.
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GARANTÍA
Todos nuestros productos están garantizados por un periodo de 24
meses desde la fecha de compra.
Las garantías sólo serán válidas si son por un defecto de
fabricación y en ningún caso por un uso incorrecto del producto.
Las reparaciones en garantía pueden ser realizadas, exclusivamente, por el fabricante o el servicio de asistencia técnica autorizado.
Otros cargos como portes y seguros, son a cargo del comprador en todos los casos.
Para solicitar reparación en garantía es imprescindible que el producto no haya sido previamente manipulado e incluir una fotocopia de la factura de compra.
WARRANTY
All D.A.S. products are warrantied against any manufacturing defect for a period of 2 years from date of purchase.
The warranty excludes damage from incorrect use of the product.
All warranty repairs must be exclusively undertaken by the factory or any of its authorised service centers.
To claim a warranty repair, do not open or intend to repair the product.
Return the damaged unit, at shippers risk and freight prepaid, to the nearest service center with a copy of the purchase invoice.
Manual del Usuario / aero 8A / User’s Manual
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DECLARACIÓN DE CONFORMIDAD
DECLARATION OF CONFORMITY
D.A.S. Audio, S.A.
C/ Islas Baleares, 24 - 46988 - Pol. Fuente del Jarro - Valencia. España (Spain).
Declara que la aero 8A: Declares that aero 8A:
Cumple con los objetivos esenciales de las Directivas: Abide by essential objectives relating Directives:
lDirectiva de Baja Tensión (Low Voltage Directive) 2006/95/CE
lDirectiva de Compatibilidad Electromagnética (EMC) 2004/108/CE
lDirectiva RoHS 2002/95/CE
lDirectiva RAEE (WEEE) 2002/96/CE
Y es conforme a las siguientes Normas Armonizadas Europeas: In accordance with Harmonized European Norms:
lEN 60065:2002 Audio, video and similar electronic
apparatus. Safety requirements.
lEN 55103-1:1996 Electromagnetic compatibility.
Product family standard for audio, video, audio­visual and entertainment lighting control apparatus for professional use. Part 1:Emission.
lEN 55103-2:1996 Electromagnetic compatibility.
Product family standard for audio, video, audio­visual and entertainment lighting control apparatus for professional use. Part 2:Immunity.
Manual del Usuario / aero 8A / User’s Manual
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SYSTEM DESCRIPTION
The æro 8A compact line array system joins the family of professional sound touring products.
The system incorporates an impressive battery of high tech features that take compact line array systems to an unprecedented level of performance. The latest in Class D power amplification, digital processing and optimized D.A.S. components have been combined with enclosures designed for rapid deployment, precise coverage and high acoustic output.
The æro 8A incorporates a D.A.S. 8MN, 8” low frequency transducer. The transducer employs a 62 mm (2.5”) voice coil and neodymium magnet motor assembly. Effective heat evacuation is achieved by way of the Total Air Flux (TAF) cooling scheme which permits high power handling and low power compression.
High frequency reproduction relies on the exceptional characteristics of the new D.A.S. M- 60N neodymium compression driver designed for use in applications where high SPL and low distortion are required. A pure titanium diaphragm featuring a 50 mm (2”), aluminium flat-wire voice coil yields high sensitivity, low distortion and extended frequency response. Each motor system has a copper shorting ring surrounding the pole piece which effectively reduces eddy current induced distortion with the added benefit of increasing the very high frequency output by reducing the inductive rise of the voice coil. The driver is attached to a new BPS-191 waveguide­horn assembly.
The AX-aero8 (rigging grid) accessory is used to fly the æro 8A systems. To stack the æro 8A, use the AXS-aero8. The AX-LX212 (rigging grid) allows the æro 8A to be flown below LX-212R or LX-212RA.
The two-way amplifier design of the æro 8A sets a new industry benchmark in audio performance, efficiency and power density. This is made possible by employing 3rd generation Class D technologies which have significantly improved three key parameters, audio performance, efficiency and weight.
The 350W amplifier provides extended bandwidth, improved dynamic range and exceptionally low distortion. Impressively compact in size and light in weight, its high power density of over 12W per cubic inch promotes an ampliifer design that requires much less space, reducing the overall cabinet size and in turn, the total cabinet weight-an important attribute for flown systems. The high efficiency of the æro 8A amplifier ensures cool operation so that no fans or bulky heatsinks are needed.
Signal processing is accomplished by way of a powerful 24 bit DSP providing unparalleled control over critical signal parameters. Digital Finite Impulse Response (FIR) filters are used in the signal processing of the æro 8A. Using powerful Wavelet analysis to provide an accurate time­frequency representation combined with precise adjustment of the FIR filters, D.A.S. engineers are able to achieve perfect time alignment.
The æro 8A system is protected by two types of limiters-an instantaneous peak limiter to safeguard the systems against spikes and a sonically transparent RMS limiter that controls excessive overpowering and thermal damage to components. This combination provides comprehensive protection for both the speaker components and signal electronics.
The easily portable and rugged enclosure is manufactured using Birch plywood and finished with a durable black paint. The trapezoidal
æro 8A’s
shape and rear located splay angle adjusters keep the front spacing between adjacent elements the same, providing the array with a “seamless” front baffle, for improved array performance. The captive rigging system splay angles range from 0º to 10º and can be adjusted in 1º increments, allowing a wide range of column curvatures to be accomplished.
Manual del Usuario / aero 8A / User’s Manual
LINE DRAWING
526
245
355
ALL DIMENSIONS IN MILIMETERS
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AMPLIFIER DESCRIPTION
1) INPUT :
1/4” Jack+XLR c
signal connector. This is a balanced connector just like the LOOP THRU connector with the following pin assignments
1 or S =GND (ground). 2 or T =(+) Non inverted input. 3 or R =(-) Inverted input.
2) LOOP THRU :
XLR-type output signal connector for connecting several units together and sending them all the same signal.
3) LIMIT :
Red LED indicates amplifier saturation. Amplifier limiter indicator lights.
4) SIGNAL :
Green LED indicates signal presence.
5) ON :
Green LED indicates that the unit is ON.
ombined socket-type input
:
FOR CONTINUED PROTECTION
Frequency
4 Units /
Short Throw
LOOP THRU
AGAINST RISK OF FIRE REPLACE
6
ONLY WITH THE SAME TYPE
T5 A L 250V FUSE
8
7
9
WARNING!
AC OUTPUTAC INPUT
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
MAX. 20 UNITS IN PARALLEL
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE
20080011
D.A.S. AUDIO S.A. (
MADE IN SPAIN
N1918
Valencia)
8
1A 50Hz/60Hz
230V
8 Units /
Long Throw
INPUT
4kHz
HF EQ. ON
HF EQ. OFF
HF EQ.
ON/OFF
2
+3 dB
0
LIMIT
SIGNAL
3
ON
4
5
1
æro 8A Amplifier
6) HF EQ :
Switch for equalisation on high frequency:
>8 units / Long Throw = HF EQ ON.
120.0
dBSPL
110.0
100.0
90.0
80.0
HF EQ ON HF EQ OFF
æro 8A Frequency response
7) FUSE :
Fuse holder. Use only the recommended fuse type and size.
10k5k2k1k50020010050201010 20kHz
8) AC INPUT :
Neutrik PowerCon mains connector for AC cord inlet. Use this equipment only with an appropriate mains cord for your country.
9) AC OUTPUT :
Neutrik PowerCon mains connector for AC cord outlet (Max. 16 units for 230V version. Max. 10 units for 115V version).
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Manual del Usuario / aero 8A / User’s Manual
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Preliminary
This product should only be used in E1, E2, E3 or E4(*) environments, in accordance with standard EN55103-2 (Electromagnetic compatibility. Product family standard for audio, video, audio-visual and entertainment lighting control apparatus for professional use. Part 2: Immunity.)
The rain protector provided by DAS is designed to protect the unit from splashes. It also permits an adequate ventilation. Do not cover the unit with other objects and do not obstruct its ventilation.
For consumption reasons, it is important not to connect the equipment to the same line as the lighting systems, thus avoiding interruptions or sudden drops in lighting intensity.
ON / OFF
A sound system should be switched on sequentially. Switch on the self-powered units last in your sound system (switch on the subwoofer before the mid-high system). Switch on the sound sources such as CD players or turntables, then the mixer, then the processors, and finally the self­powered unit. If you have several units, it is recommended that you switch them on sequentially one at a time.
Follow the inverse order when switching off, turning self-powered units off before any other element in the sound system.
Disconnect the device by removing the mains connector from the mains socket. The mains connector and mains socket must always be freely accessible and never covered or blocked in any way. The mains cable can be detached from the device by disconnecting the Neutrik PowerCon connector. Always disconnect the device by removing the mains connector from the mains socket before detaching the mains cable at the Neutrik PowerCon connector.
IMPORTANT: Do not disconnect the unit when it is playing music.
Ensure that the device is disconnected from mains by observing that the ON LED is turned off. Please note that the ON LED can stay on for several seconds after the mains power has been disconnected.
Overload indicator
This device has an indicator (LIMIT LED) that lights when the signal is excessive.
The indicator should not be lit continuously. This distorts the signal (quickly fatiguing your ears) and may damage the speakers. Therefore, it is recommended that you never work with this LED on; at most it should blink only occasionally.
Overheating
This equipment does not overheat during normal conditions of use. Should overheating occur the unit will protect itself. You should then find out why and if necessary contact an authorised dealer for Technical Assistance.
Normally it is enough just to let the unit cool down after you have corrected the problem so that the system functions properly again.
Equalisation
The unit does not need extreme settings of equalisation to produce quality sound. Avoid high levels of gain on the equalisers. Gain values above +3 dB on a console’s EQ are not recommended.
Low mains voltage
If mains voltage falls below the shutdown voltage for the unit, it will stop playing. When acceptable levels are regained, the unit will switch back on automatically.
The power supply allows the system to function using two voltage ranges: from 90V to 128V, for 115V AC version, and from 180V to 256V, for 230V AC version.
The current consumed by the first range (90 to 128V) is double the second to achieve the same acoustic power level.
Current consumption:
Pink Noise Mains 230 Vrms
Max. Power
1/3 Power
1/8 Power
Idle
1.1A
0.86A
0.6A
0.2A
(*)Note
E1.- Residential. E2.- Commercial and light industrial. E3.- Urban outdoors. E4.- Controlled EMC environment and the rural outdoors environment.
Manual del Usuario / aero 8A / User’s Manual
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Connections
The æro 8A can be used full-range. Full-range use is only recommended for applications where low SPL level and no bass reinforcement is required. To use it in this mode simply plug the mixer into the enclosure's input.
The most common use will be combined with the LX-212A or LX-212RA. In this case different outputs of the mixing console should be used for the provide æro 8A and the SUBs. The use of an external delay to control and adjust the phase of the subs is recommended (with a DSP, for example). The SUBs units are linked with the THRU option setting. As well, the amplifier of the
æro 8A incorporates signal treatment which
provides frequency range extension down to 95Hz.
aero 8A
Retardo /
Mezclador / Mixer
Delay
Procesador /
processor
LX-212A / LX-212RA
The LOOP THRU connector is an output XLR in parallel with the input connector and is useful for daisy chaining the input signal to a number of boxes, connecting them in parallel.
The number of units that can be linked this way depends on the output impedance of the equipment driving the enclosure, such as the mixer or processor. Typically, to avoid signal degradation, the maximum number that can be daisy chained is given by the formula Zc>10Zs, where Zc is the load impedance and Zs is the output impedance of the equipment driving the enclosure (mixer, console, etc). For instance, a mixing console with 100 ohm output impedance allows daisy chaining 20 boxes, when the input impedance of the cabinets is 20K ohm.
LINKLINKLINKLINK
LINK
POWER SUPPLY
12 x æro 8A
6 LX-212A
Center Subs
LINKLINKLINKLINKLINK
DSP-2060
OUT3
OUT1 OUT2
LINK LINK LINK LINK
LINKLINKLINKLINKLINK
OUT4
POWER SUPPLY
LINK
LINKLINKLINKLINK
POWER SUPPLY
LINK
POWER SUPPLY
In applications where the SUBs need to be delayed, the and use separate signal routing
LINK LINK
aero 8A LX-212A
and control at the processor.
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Manual del Usuario / aero 8A / User’s Manual
POWER SUPPLY
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Troubleshooting
PROBLEM
CAUSE
SOLUTION
No sound from the unit. The SIGNAL LED does not light up.
Full power cannot be obtained. The LIMIT LED never lights up.
Sound is distorted. The LIMIT LED is not on, or only lights up occasionally.
Sound is distorted and very loud and LIMIT LED lights up.
Hum or buzz when a mixer is connected to the unit.
Hum or buzz when using lighting controls in the same building.
The ON LED does not light up when the mains connector is connected and the unit is switched to ON.
1 – The signal source is sending no signal. 2 – Defective cable.
3 - The amplifier has overheated.
The signal source does not have a hot enough output.
The mixer or signal source is distorting.
The system is overloaded and has reached maximum power.
1.– The console probably has un­balanced outputs. You may be using an incorrect un-balanced to balanced cable.
2.– The mixer and the powered speaker are not plugged into the same mains outlet.
3.– The audio signal cable is too long or too close to an AC cable
1.– The audio signal cable is too long or too close to the lighting cable.
2.– On a sound system with three­phase AC, the lighting equipment and the UNIT are connected to the same phase.
1.– Bad or loose AC connection to the UNIT or the mains outlet. 2 – Faulty AC cable.
3 – Blown Fuse.
4 - The mains voltage is out of range.
1 – Check that the mixer or sound source is sending signal to the UNIT. 2 – Check that the cable from the sound source to the UNIT is connected correctly. Replace the cable if defective. 3 - Allow the unit to cool down for some minutes and it will function again. Check the main output level of the mixer or channel gains since the unit will have been functioning with excessive levels.
If using a mixer, use the balanced output if available. Use a professional mixer with a hotter output.
Turn mixer channel gains down. Check that none of your signal sources are distorting.
Turn down the mixer's output.
1.– Read the appendix of this manual to make a correct un­balanced to balanced cable.
2.– Connect the mixer and the unit to the same mains outlet.
3.– Use a cable that is as short as possible and/or move the audio signal cable away from mains cables.
1.– Move the audio signal cable away from lighting cables. Try to find out at what point the noise is leaking into the system.
2.– Connect the sound system to a different phase than the lights. You may need the help of an electrician.
1.– Check your connections.
2.– Check the cables, connectors and AC power with a suitable mains tester.
3.- Replace the blown fuse for another of the same type and size.
4.- If the multimeter determines that the mains voltage is out the range, you may need the assistance of an electrician to find an appropriate solution.
Manual del Usuario / aero 8A / User’s Manual
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BLOCK DIAGRAM
Input
Loop thru
DSP
HIGH
LOW
Limit
Signal
ON
Switching Power Supply
Switching Power Supply
MAIN
HF
LF
SPECIFICATIONS
Nominal LF Power Amplifier 250 W (Class D) 1800 W (Class D) 1800 W (Class D)
Nominal HF Power Amplifier 100 W (Class D) --- ---
Frequency Range (-10 dB) 95 Hz -20 kHz 45 Hz -138 Hz 45 Hz -138 Hz
Horizontal Coverage (-6dB) 90º Nominal --- ---
Rated Maximum Peak SPL at 1 m
Transducers/Replacement Parts LF: 1 x 8MN/GM 8MN
Rigging System Splay Angles Integrated in box design Ground Stackable
1. Maximum calculated Peak SPL based on sensitivity and RMS power handling.
Vertical Coverage Splay Dependent --- ---
Enclosure Geometry Trapezoidal 5º Rectangular Rectangular
Enclosure Material Birch Plywood Birch Plywood Birch Plywood
AC Power Requirements 115 V, 50 Hz/60 Hz
Dimensions (H x W x D) 24.5 x 52.6 x 35.5 cm
Model
Input Type Balanced Differential Line Balanced Differential Line Balanced Differential Line
Input Impedance Line: 20 kohms Line: 20 kohms Line: 20 kohms
Sensitivity Line: 1.95 V (+8 dBu) Line: 1.95 V (+8 dBu) Line: 1.95 V (+8 dBu)
(1)
128 dB 136 dB 136 dB
Color/Finish Black Paint Black Paint Black Paint
Connectors INPUT: Female XLR
AC INPUT: PowerCon NAC 3 FCA
AC OUTPUT: Powercon NAC 3 DFCB
Weight 18 kg (39.6 lbs) 49 kg (107.8 lbs) 65 kg (143 lbs)
Accessories AX-aero8 Rigging Grid
aero 8A LX-212A LX-212RA
HF: 1 x M-60N/GM M-60
LOOP THRU: Male XLR
230 V, 50 Hz/60 Hz
9.6 x 20.7 x 14 in
AX-LX212 Rigging Grid
AXS-aero8
LF: 2 x 12LXN/GM 12LX LF: 2 x 12LXN/GM 12LX
INPUT: 2 x Female XLR
LOOP THRU: 2 x Male XLR
AC INPUT: PowerCon NAC 3 FCA
AC OUTPUT: Powercon NAC 3 DFCB
115 V, 50 Hz/60 Hz 230 V, 50 Hz/60 Hz
48.8 x 48 x 87 cm
(19.2 x 18.9 x 34.3 in)
AX-LX212 Rigging Grid
PL-212S
TRD-5
AC INPUT: PowerCon NAC 3 FCA
AC OUTPUT: Powercon NAC 3 DFCB
LOOP THRU: 2 x Male XLR
Integrated in box design
INPUT: 2 x Female XLR
115 V, 50 Hz/60 Hz 230 V, 50 Hz/60 Hz
48.8 x 52.6 x 87 cm
(19.2 x 20.7 x 34.3 in)
AX-LX212 Rigging Grid
PL-212S
TRD-5
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Manual del Usuario / aero 8A / User’s Manual
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RIGGING SYSTEM
Warning
This manual contains needed information for flying D.A.S. Audio line array systems, description of the elements and safety precautions.
To perform any operations related to flying the system, read the present document first, and act on the warnings and advice given.
The goal is to the allow the user to become familiar with the mechanical elements required to fly the acoustic system, as well as the safety measures to be taken during set-up and teardown.
Only experienced installers with adequate knowledge of the equipment and local safety regulations should fly speaker boxes.
It is the user's responsibility to ensure that the systems to be flown (including flying accessories) comply with state and local regulations.
The working load limits in this manual are the results of tests by independent laboratories. It is the user's responsibility to stay within safe limits. It is the user's responsibility to follow and comply with safety factors, resistance values, periodical supervisions and warnings given in this manual.
When flying a system, the working load must be lower than the resistance of each individual flying point in the enclosure, as well as each box.
Hanging hardware should be regularly inspected and suspect units replaced if in doubt.
This is important to avoid injury and absolutely no risks should be taken in this respect. It is highly recommended that you implement an inspection and maintenance program on flying elements, including reports to be filled out by the personnel that will carry out the inspections.
Local regulations may exist that, in case of accident, may require you to present evidence of inspection reports and corrective actions after defects were found.
Absolutely no risks should be taken with regards to public safety. When flying enclosures from ceiling support structures, extreme care should be taken to assure the load bearing capabilities of the structures so that the installation is absolutely safe.
Do not fly enclosures from unsafe structures.
Product improvement by means of research and development is on going at D.A.S. Specifications are subject to change without notice.
To this date, there is no international standard regarding the flying of acoustic systems. However, it is common practice to apply 5:1 safety factors for enclosures and static elements.
For slings and elements exposed to material fatigue due to friction and load variation the following ratios must be met; 5:1 for steel cable slings, 4:1 for steel chain slings and 7:1 polyester slings.
Thus, an element with a breaking load limit of 1000 kg may be statically loaded with 200 kg (5:1 safety factor) and dynamically loaded with 142 Kg (7:1 safety factor).
Consult a certified professional if needed.
All flying accessories that are not supplied by D.A.S. Audio are the user's responsibility. Use at your own risk.
Description
D.A.S. Audio æro 8A line array systems, include 2 rigging structures on each side of the box. Manufactured from zinc plated steel they are painted black and are affixed to an internal plate with special crop resistant screws. Two special stainless steel cam links are assembled to each of the structures, allow for stacking or flying of boxes. Splay angles can be changed from 0º to 10º in 1º increments.
Manual del Usuario / aero 8A / User’s Manual
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2 2
1
AX-aero8
Weight: 6,4 kg.
Dimensions (H x W x D):
174 x 517 x 356 (mm.).
6.85 x 20.35 x 14 (in.).
WLL: 400 kgf.
4
To position the cam link, extract the cam from its location. Align the hole on the lower part of the cam link with the hole on the rigging hardware marked with the desired angle (1) and insert the quick release safety pin (6 mm). The cabinet can now be attached to the bottom of the upper cabinet (2) by hooking the upper part of the cam link to the positioning point (3) on the upper cabinet, aligning the hole on the upper part of the cam link with the hole on the lower part of the rigging hardware (4) and inserting the quick release safety pin (6 mm).
4º 4º
3º 3º
1º 1º2º 2º
6º 6º
0º 0º
7º 7º
5º 5º
8º
9º 9º
10º 10º
ARNING: WEIGHT
W
LIMIT 12 UNITS
ARNING: WEIGHT
W
LIMIT 12 UNITS
8º
3
Detail of the left and right markings on the rigging hardware each indicating the obtained splay angles. To set the cam links, 6 mm quick release safety pins should be used.
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Manual del Usuario / aero 8A / User’s Manual
Page 17
The AX-aero8 should be used to fly the aero 8A, only. To fly the aero 8A combined with LX-212R or LX-
212RA, use the AX-LX212.
AXC-AT
AXS-aero8
AXC-ZT
TRD-2 ó TRD-6
AXS-aero8
The AXS-aero8 can be used with TRD-6, TRD-2, AXC-AT and AXC-ZT for light aplications (see drawing).
Manual del Usuario / aero 8A / User’s Manual
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Page 18
AXS-aero8
50mm (max.)
By way of the AXS-aero8, the aero 8A (up to 4 units only) can be used to stack on the top of a subwoofer (on the top of a LX-212 in the drawing). Note: More information at www.dasaudio.com
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Page 19
CONFIGURATION: 1
12 x æro 8A
4 LX-212RA
Theater Auditorium
(*) (*)
LINK
POWER
SUPPLY
LINKLINKLINKLINK
LINK
POWER
SUPPLY
LINK
LINK LINK
LINKLINKLINKLINKLINK
LINKLINKLINKLINKLINK LINK LINK
POWER SUPPLY
LINKLINKLINKLINK
LINK
POWER SUPPLY
SIGNAL
ON
LEVEL
0
CARDIOID OMNI
F
R
b
LOW-PASS
+6-oo
100Hz
POLARITY
- +
F
b
F
(*) Cabinets facing rear:
125Hz
Press Cardioid Preset button to
“R” position to activate cardioid mode.
160Hz CARDIOID
PRESET
R F
Manual del Usuario / aero 8A / User’s Manual
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Page 20
CONFIGURATION: 2
POWER
SUPPLY
LINK
LINKLINKLINKLINKLINK
6 LX-215A
12 x æro 8A
Center Subs
LINKLINKLINKLINK
POWER
SUPPLY
LINK
OUT4
DSP-2060
LINK
14
LINKLINKLINKLINKLINK
LINKLINKLINKLINK
Manual del Usuario / aero 8A / User’s Manual
OUT1 OUT2
OUT3
POWER
SUPPLY
LINK LINK LINK LINK
LINK
POWER
SUPPLY
POWER
LINK
SUPPLY
Page 21
CONFIGURATION: 3
LINK
LINK LINKLINKLINKLINK
LINKLINK
POWER
SUPPLY
POWER
SUPPLY
LINKLINKLINKLINKLINKLINKLINK
8 LX-215A
16 x æro 8A
OUT4
LINK
DSP-2060
POWER
SUPPLY
Center Cardioid Subs
OUT1 OUT2
LINKLINKLINKLINKLINK
LINKLINKLINKLINK
LINKLINK
LINK
LINKLINK
OUT3
POWER
SUPPLY
LINK
POWER
SUPPLY
(*) Cabinets facing rear:
Press Cardioid Preset button to “R” position to activate cardioid mode.
Manual del Usuario / aero 8A / User’s Manual
SIGNAL
ON
LEVEL
0
CARDIOID OMNI
R
b
LOW-PASS
+6-oo
100Hz
POLARITY
- +
F
125Hz
F F
b
160Hz CARDIOID
PRESET
R F
LINK LINK LINK LINK LINK LINK
LINK
(*) (*) (*) (*)
POWER
SUPPLY
15
Page 22
APPENDIX: Line connections: unbalanced and balanced
There are two basic ways to transport an audio signal with microphone or line level:
Unbalanced line: Utilising a two conductor cable, it transports the signal as the voltage between them. Electromagnetic interference can get added to the signal as undesired noise. Connectors that carry unbalanced signals have two pins, such as RCA (Phono) and ¼” (6.35mm, often referred to as jack) mono. 3 pin connector such as XLR (Cannon) may also carry unbalanced signals if one of the pins is unused.
Balanced line: Utilising a three conductor cable, one of them acts as a shield against electromagnetic noise and is the ground conductor. The other two have the same voltage with respect to the ground conductor but with opposite signs. The noise that cannot be rejected by the shield affects both signal conductors in the same way. At the device’s input the two signals get summed with opposite sign, so that noise is cancelled out while the programme signal doubles in level. Most professional audio devices use balanced inputs and outputs. Connectors that can carry balanced signal have three pins, such as XLR (Cannon) and ¼” (6.35mm) stereo.
The graphs that follow show the recommended connection with different types of connectors to balanced processor or amplifier inputs. The connectors on the left-hand side come from a signal source, and the ones on the right hand side go to the inputs of the processor or amplifier. Note that on the unbalanced connectors on the left-hand side, two terminals are joined in side the connector. If hum occurs with balanced to balanced connections, try disconnecting the sleeve (ground) on the input connector. Note that the illustrations show what should be connected to what, but that pin locations on an actual XLR connector are different. Also, pin 2 hot is assumed on XLR connectors.
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Page 24
www.dasaudio.com
UM_AE8A_01
D.A.S. AUDIO, S.A.
C/. Islas Baleares, 24 46988 Fuente del Jarro Valencia, SPAIN Tel. 96 134 0525 Tel. Intl. +34 96 134 0860 Fax 96 134 0607 Fax Intl. +34 96 134 0607
D.A.S. AUDIO OF AMERICA, INC.
Sunset Palmetto Park 6816 NW 77th Court. Miami, FL. 33166 - U.S.A. TOLL FREE: 1-888DAS4USA Tel. +1 305 436 0521 Fax +1 305 436 0528
D.A.S. AUDIO ASIA PTE. LTD.
25 Kaki Bukit Crescent #01-00/02-00 Kaki Bukit Techpark 1 Singapore 416256 Tel. +65 6742 0151 Fax +65 6742 0157
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