SR-1590
ACOUSTIC FEEDBACK SUPPRESSOR
EN Instruction manual
We take this opportunity to thank you for buying this product.
We recommend you read the instruction manual before switching on the machine and follow the instructions
that are given. Keep the manual for future reference.
SECURITY AND THE ENVIRONMENT
ELECTRICAL SECURITY
Check that the current in the mains connection where the machine is to be installed corresponds to the
power supply of the machine.
To avoid damaging the equipment, electrical shocks, fire or physical injury when you connect or disconnect
the equipment from the power supply, pull the plug firmly out of the mains socket holding the plug, never the
cable.
Always do this with dry hands.
Keep the power supply cable far from sources of heat. Do not put heavy objects on top of it or change it.
Clean dust and dirt off the power supply cable regularly.
Do not open the machine; you could get an electric shock.
CAUTION
While installing the machine, make sure it is switched off and unplugged.
Do not open the machine. Touching the internal parts is dangerous and you could receive an electric shock.
The machine must not be splashed or dripped on. Never place recipients with liquid inside on the machine.
Do not place anything inside the machine.
LOCATION
Place the equipment on a horizontal surface with enough space around it to allow ventilation.
Avoid direct sunlight, heat sources and excessive dust.
Do not place the machine near magnetic fields or static electricity.
Do not use surfaces which vibrate or receive impact.
Do not pile machines on top of one another.
VENTILATION
Never block or cover the ventilation slits on the machine.
Do not expose it to direct sunlight or place it near sources of heat.
PERIODS OF INACTIVITY
When the machine is not going to be used for a long period of time, disconnect it from the mains.
If you are using an adapter, take into account that it will continue using electricity even if the machine is
switched off. If it is not going to be used for a long period of time, disconnect it from the mains.
THE ENVIRONMENT
To save energy, switch the machine off when you are not going to use it for a long time. The machine could
contain substances that are harmful to the environment or human health. To minimize the effect of these
substances the machine must be correctly managed and recycled when you decide to dispose of it.
When you dispose of it remember: it cannot be thrown into a conventional rubbish bin.
If it contains or uses batteries, these must be disposed of separately.
The machine (without batteries) must be disposed of correctly. Put it in a container specially intended for the
collection of electronic and electrical appliances, at the dump or hand it over to the dealer when you purchase
similar equipment, so that the dealer can dispose of it correctly (at no added cost).
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SIGNIFICANCE OF THE SYMBOLS ON THE MACHINE*
The symbol formed by the expression “Class 1 laser product” written in a rectangle
indicates that visible or invisible laser radiation could be produced. Avoid direct exposure
to the laser.
The symbol formed by a ray of lightening inside a triangle shows that the machine has
connection terminals or a circuit with areas with a current which could cause an electric
shock, even in normal working conditions.
The symbol formed by an exclamation mark in a triangle shows that the instruction manual
must be referred to for information on how the machine works and its use.
The symbol formed by one square inside another square shows that the machine has
double electrical insulation.
The European Community symbol shows that the machine complies with the current
European Union legislation, as well as its transposition to local legislation.
The symbol of a rubbish bin crossed out and over a horizontal line shows that when the
product is disposed of it must be done properly, placing it in a special selective electronic
and electrical equipment container or through a dealer when purchasing a similar product,
at no additional cost. It also shows that the machine was put on the market after 13th
August 2005 (European Community Directive 2002/96/CE of Electrical and Electronic
recycling, and its Spanish equivalent R.D.208/2005).
In accordance with what is set out in the aforementioned decree, FONESTAR is registered
in the RAEE (Registro de Aparatos Eléctricos y Electrónicos) in a special section REI
(Registro de establecimientos Industriales), with the entry number 001851.
The symbol RoHS (Restriction of Hazardous Substances) shows that the product has been
designed and manufactured restricting the use of certain dangerous material(Directive
2002/95/CE on the restriction of certain dangerous substances in electrical and electronic
appliances, and its transferal to the Spanish regulations, R.D. 208/2005).
*It is possible that some of these symbols do not appear on the machine.
EXEMPTION OF LIABILITY
The characteristics of the equipment and the content of the manual can change without forewarning.
FONESTAR, S.A. does not assume responsibilities regarding the inappropriate use of the equipment or the
information supplied in this instruction manual, and specifically disclaims any implied liability for marketability
or fitness for any other use.
All rights reserved by FONESTAR, S.A.
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DESCRIPTION
T
he model SR-1590 is an acoustic feedback suppressor using frequency displacement.
It efficiently removes acoustic feedback or links by using frequency displacement. Due to it being easy to use
it is suitable for all types of systems with multiple microphone inputs, such as conference systems,
congresses, board meetings, etc. where the microphones are particularly sensitive to acoustic feedback.
Activation/deactivation with a button.
CONTROLS AND FUNCTIONS
FRONT PANEL
1.- POWER: on/off switch.
2.- PROCESSING: button which allows you to activate/deactivate the feedback suppressor on the
connected inputs. By default the suppressor is automatically activated on switching the system on.
3.- POWER: LED power indicator.
4.- BYPASS: LED bypass mode indicator. In this case the feedback suppressor is deactivated and the
input signal is not processed by the system. The suppressor can be activated by pressing the
PROCESSING button once.
5.- ON: LED indicator to show that the feedback suppressor has been activated. The input signal is
processed by the system. The suppressor can be deactivated by pressing the PROCESSING button
once.
BACK PANEL
1.- LINE OUTPUT: unbalanced line level output through RCA connector. Final mix output.
2.- LINE INPUT: unbalanced line level input through RCA connector. An external mixer output with line
level for use as a feedback suppressor can be connected to this input. To activate the feedback
suppressor function you have to press the PROCESSING button on the front panel.
3.- OUTPUT: balanced output through XLR connector. Final mix output.
4.- MIC IN: microphone level input with XLR connector. An external mixer with microphone level to be used
as a feedback suppressor can be connected to this output. To activate the feedback suppressor function
you have to press the PROCESSING button on the front panel.
5.- 230 V AC/ 50 Hz mains connection socket.
INSTALLATION AND CONNECTION
Maintain the mixer switched off while the connections are being made.
Check that the cable connectors are firmly connected to the input connectors. A bad connection could cause
noise or interference.
Use suitable cables and ones that are not excessively long to make the connections: shielded cables,
preferably low capacity.
Always start with the mixer volume controls at a minimum. Move the controls slowly.
To clean the system use a dry cloth or an air spray.
Connect the source to the mains (230 V AC).
When not using the mixer disconnect the power supply source from the mains to avoid using electricity.
CONNECTION DIAGRAM
The model SR-1590 acts as a feedback suppressor for an external source connected via a balanced XLR mic.
Level input or an unbalanced RCA line level input.
Connect the output of the external source (microphone mixer, conference system, etc.) to the MIC IN or LINE
INPUT on the back panel, depending on its level. Activate the feedback suppressor by pressing the
PROCESSING button on the front panel.
The LINE OUTPUT OR OUTPUT outputs can be introduced again in the external source, if it has a
SEND/RETURN or PRE OUT/AMP IN. Otherwise, the LINE OUTPUT or OUTPUT can be introduced in a
power amp.
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ACOUSTIC FEEDBACK DETECTION
The main mission of the SR-1590 is to remove links or acoustic feedback in the inputs connected to it.
Acoustic feedback is produced when the sound reproduced by the speakers is picked up on again by the
microphone, to be amplified again. It is known as the LARSEN effect. It could be due to a bad distribution of
the microphones in a room, the acoustic conditions of the area or excessive amplification.
The feedback suppressor removes the links by displacing the frequency of the audio signal a few hertz using
very precise oscillation. In this way it avoids the production of acoustic feedback at a frequency that is
favoured by the amplification system and the characteristics of the area it is being used in.
So that the feedback suppressor works, it has to detect which of the microphone inputs is producing the
effect. Then the gain level of that input has to be attenuated to the exact point where it can tell that the
microphone is being linked and the feedback suppressor has to be activated using the buttons.
If acoustic feedback is not detected, activating the feedback suppressor is not necessary, as the system
response will be unnecessarily weakened at high frequencies.
ADJUSTING THE FEEDBACK PARAMETERS
It is possible to adjust the feedback suppressor parameters precisely. To access the two adjustment
potentiometers you need to unscrew the screws on the top lid on the top and sides of the system.
Once open, on the right-hand side of the back you will find two blue square potentiometers, as shown in the
picture, which let you adjust the sensitivity of the inputs and the speed of the signal displacement.
To work with these, use a precision screw driver. Moving the adjustment anti-clockwise the sensitivity and
speed increases. Turning it clockwise, it decreases.
SPECIFICATIONS
SR-1590
C
HARACTERISTICS
F
eedback suppressor.
Frequency displacement 5Hz ±1Hz.
Mono mode.
RESPONSE 20-20 000 Hz without feedback suppression.
150-15 000 Hz with feedback suppression
INPUTS 1 balanced mic,XLR 5,000Ω 2.5 mV
1 unbalanced line, RCA 5,000Ω 1 V
OUTPUTS 1 balanced mic., XLR 600 Ω100mV
1 unbalanced line, RCA 600Ω 2.5V
POWER SUPPLY 230 V AC, 12 W
DIMENSIONS 483 x 44.5 x 210 mm depth. 1 U 19" rack
WEIGHT 2.3 kg
ACCESSORIES 1 RCA cable
1 XLR cable
2 x 6.3 mm jack to RCA cables
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DECLARATION OF CONFORMITY
The feedback suppressor model SR-1590 complies with the European Community directives
2004/108/CE on Electromagnetic Compatibility and 2006/95/CE on Low Voltage.
Santander, 24th January 2011
Juan Vallejo
Technical Engineer, Sales Department
WARRANTY
This product has been tested and has passed the corresponding quality control prior to being put on the market.
FONESTAR guarantees the suitability of the product for its specified use during a period of 2 years from the
delivery date and commits itself to repair or substitute the goods as expressed in the Spanish law ‘La Ley
General para la Defensa de los Consumidores y Usuarios, Real Decreto Legislativo 1/2007 16 Noviembre.
The lack of conformity in the first six months after purchase, due to a manufacturing defect, will be rectified with
no more than showing the proof of purchase. After six months FONESTAR reserves the right to demand proof of
the product being sold with that problem.
This warranty does not include damage produced by: inappropriate use or negligence, accidents, worn out parts
due to use, breakages, burns, spilt liquids or other substances, excessive humidity, battery deterioration and
internal manipulation of the device, the software or its components by unauthorized persons, and in general any
use that is unrelated to the nature and purpose of the product.
If any service is needed during the warranty period because of lack of conformity, please contact the business or
distributor where the product was purchased in no more than 2 months after being conscious of the problem. It
is only necessary to contact FONESTAR if it is impossible or imposes an undue burden for them to solve it.
To benefit from this warranty it is necessary to show the proof of purchase with the date clearly visible, with no
corrections or crossing out.
This document adds information, and never decreases the consumers’ rights, which in all cases are protected by
the Spanish law ‘La Ley General para la Defensa de los Consumidores y Usuarios, Real Decreto Legislativo
1/2007 16 Noviembre’
FONESTAR is a member of ECOEMBALAJES ESPAÑA, S.A. “ECOEMBES”, with number 03497 and all our products carry
the symbol, backed by our membership and subscription to the above mentioned organization with the recycling and
subsequent management of our packaging.
FONESTAR S.A. - NIF A28780443 - Apartado 191 - 39080 - Santander, Cantabria, (Spain)
www.fonestar.com
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