DYNACORD SL900, SL1200, SL1800, SL2400 User Manual
SL Series | Standard Precision Power Amp
SL 900 | 1200 | 1800 | 2400
Owner‘s Manual | Bedienungsanleitung
STANDARD PRECISION SERIES
2 Owner‘s Manual / Bedienungsanleitung
STANDARD PRECISION SERIES
CONTENTS
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Scope of Delivery and Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Features and Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Responsibility of the User . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Controls, Indicators and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operating Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mains Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Groundlift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
LPN-Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Selecting the Mode Of Operation and Audio Output Cabeling . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Audio Input Cabeling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Volume Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
FAN Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INHALT
Beschreibung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Willkommen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Auspacken und Inspektion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Lieferumfang und Garantie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Eigenschaften & Beschreibung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Verantwortung des Betreibers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bedienelemente, Anzeigen und Anschlüsse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Betriebsspannung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Netzschalter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Einbau . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Kühlung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Groundlift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
LPN-Filter (Low-Pass-Notch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Betriebsart (MODE) und Verkabelung des Audio-Ausgangs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Verkabelung des Audio-Eingangs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Betrieb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Eingangspegel-Regler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Anzeigen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Lüfter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Specifications/Technische Daten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Owner‘s Manual / Bedienungsanleitung 3
IMPORTANT SAFETY INSTRUCTIONS
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
sufficent magnitude to constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and
maintance (servicing) instructions in the literature accompanying
the appliance.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not cover any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or the grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for a long period of time.
14. Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as powersupply cord or plug is damaged, liquid has been spilled or orbjects have fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
15. Do not expose this equipment to dripping or splashing and ensure that no objects filled with liquids, such as vases, are placed on the equipment.
16. To completely disconnect this equipment from the AC Mains, disconnect the power supply cord plug from the AC receptacle.
17. The mains plug of the power supply cord shall remain readily operable.
18. No naked flame sources, such as lighted candles, should be placed on the apparatus.
19. The product should be connected to a mains socket outlet with a protective earthing connection.
IMPORTANT SERVICE INSTRUCTIONS
CAUTION: These servicing instructions are for use by qualified personnel only. To reduce the risk of
electric shock, do not perform any servicing other than that contained in the Operating Instructions
unless you are qualified to do so. Refer all servicing to qualified service personnel.
1. Security regulations as stated in the EN 60065 (VDE 0860 / IEC 65) and the CSA E65 - 94 have to be obeyed when servicing the appliance.
2. Use of a mains separator transformer is mandatory during maintenance while the appliance is opened, needs to be operated and is connected to the mains.
3. Switch off the power before retrofitting any extensions, changing the mains voltage or the output voltage.
4. The minimum distance between parts carrying mains voltage and any accessible metal piece (metal enclosure), respectively between the mains poles has to
be 3 mm and needs to be minded at all times. The minimum distance between parts carrying mains voltage and any switches or breakers that are not connected to the mains (secondary parts) has to be 6 mm and needs to be minded at all times.
5. Replacing special components that are marked in the circuit diagram using the security symbol (Note) is only permissible when using original parts.
6. Altering the circuitry without prior consent or advice is not legitimate.
7. Any work security regulations that are applicable at the locations where the appliance is being serviced have to be strictly obeyed. This applies also to any
regulations about the work place itself.
8. All instructions concerning the handling of MOS-circuits have to be observed.
NOTE: SAFETY COMPONENT (MUST BE REPLACED BY ORIGINAL PART)
WEEE RECYCLING/DISPOSAL INSTRUCTIONS
The Wheelie Bin symbol found on the product or in the manual indicates that this product must not be disposed of with other waste. It is in our category the
manufacturer’s responsibility to properly dispose of their waste electrical and electronic equipment (WEEE) at the end of its life. Due to the differences in each EU
country’s management of WEEE, please contact your local distributor. We are committed to facilitate our own electronic-waste-management-system, for the free
of charge return of all EVI Audio GmbH products: Telex, DYNACORD, Electro-Voice and RTS. Arrangements are made with the dealer where you purchased the
equipment from, for the returning of all unusable equipment at no cost, to the factory in Straubing, for environmental protective disposal.
Due to line current harmonics, we recommend that you contact your supply authority before connection.
STANDARD PRECISION SERIES
1 Introduction
1.1 Welcome
Thank you for choosing Dynacord SL series amplifier. Please take time to consult this manual so that you can understand all
the features built into your Dynacord amplifier and fully utilize all its performance capabilities.
1.2 Unpacking and Inspection
Carefully open the packaging and take out the power amplifier. Inspect the power amp’s enclosure for damages that might
have happened during transportation. Each amplifier is examined and tested in detail before leaving the manufacturing site to
ensure that it arrives in perfect condition at your place. Please inform the transport company immediately, if the power
amplifier shows any damage. Being the addressee, you are the only person who can claim damages in transit. Keep the
cardboard box and all packaging materials for inspection by the transport company.
Keeping the cardboard box including all packing materials is also recommended, if the power amplifier shows no external
damages.
CAUTION:
Do not ship the power amp in any other but its original packaging.
When shipping the power amp, make sure to always use its original box and packaging materials. Packing the power amplifier
like it was packed by the manufacturer guarantees optimum protection from transport damage.
1.3 Scope of Delivery and Warranty
• 1 Power Amplifier
• 1 Owner‘s Manual (this document)
• 1 Mains Cord
• 4 Foot Stands
• 1 Warranty Certificate
Keep the original invoice that states the purchase/delivery date together with the warranty certificate at a safe place.
1.4 Features and Description
Dynacord SL series amplifiers offer a package of reliable high output power, high efficiency and legendary pro audio
performance. They are the premium choice as system drive for a variety of mobile and club sound systems. Their
comprehensive protection system includes circuitry against overheating, overload, short circuit, HF and DC as well as backEMF and inrush current. Loudspeakers are protected by turn-on-delay relays.
The build-in patented LPN (Low-Pass-Notch) filter compensates for transient distortion in dynamic signals (such as kickdrums) to achieve a higher acoustic output and more punch.
1.5 Responsibility of the User
Speaker System Damage
SL power amps provide extremely high power output that might be dangerous for human beings as well as for the connected
speaker systems. High output voltages can damage or even destroy the connected speaker systems, especially, when the SL
amplifier is operated in bridged mode. Prior to connecting any loudspeakers, make sure to check the speaker system’s
specifications for continuous and peak power handling capacities. Even if amplification has been reduced through lowering
the input level controls on the amplifier’s front panel, it is still possible to achieve full power output with a sufficiently high input
signal.
Danger at the Loudspeaker/Power Outputs
SL amplifiers are capable of producing dangerously high voltage output that is present at the output connectors. To protect
yourself from electric shock, do not touch any blank speaker cables during operation of the power amp.
WARNING:
The terminals marked with are hazardous live and the external wiring connected to these
terminals requires installation by an instructed person or the use of ready-made leads of
cords.
RF-Interference (FCC Information USA)
1. IMPORTANT: Do not modify this unit! Changes or modifications not expressly approved by the manufacturer could void the
user‘s authority, granted by the FCC, to operate the equipment.
Owner‘s Manual 5
STANDARD PRECISION SERIES
2. NOTE:This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection agains harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected
• Consult the dealer or an experienced radio/TV technician for help
This is a Class A product. In a domestic environment this product may cause radio interferences in which case the user may be required to take adequate measures.
This Class A digital apparatus complies with Canadian ICES-003.
Cat appareil numérique de la classe A est conforme à la norme NMB-003 du Canada.
6 Owner‘s Manual
2 Installation
2.1 Controls, Indicators and Connections
Front View
1 Input Level Control (CH A, CH B) for channels A and B
2 Level Indicators for channels A and B
3 Protections Indicator (PROTECT)
4 Power On/Off Indicator (POWER)
5 Mains Switch
STANDARD PRECISION SERIES
Rear View
1 Mains Input
2 Ground Lift Switch (CIRCUIT ⊥ TO CHASSIS SWITCH)
3 Type Plate
4 Audio Inputs (INPUT A, INPUT B)
5 Audio Outputs (OUTPUT A, OUTPUT B)
6 Power Amp Mode Switch (MODE)
7 LPN Filter Switch (LPN)
8 Power Amp Outputs Speakon™ (CHANNEL A, CHANNEL B)
Owner‘s Manual 7
STANDARD PRECISION SERIES
2.2 Operating Voltage
The power amplifier receives its power supply via the Mains input. Only the provided power cord may be used. During
installation, always separate the power amplifier from the mains. Connect the power amplifier only to a mains network, which
corresponds to the requirements indicated on the type plate.
2.3 Mains Switch
The Mains Switch on the front panel separates the power amp from the mains. Turning
the Mains Switch to ON starts booting up the power amp. A soft start circuit compensates
mains inrush current peaks and thus prevents the automatic cutout of the mains from
reacting when switching on the power amplifier. Speaker system switch-on is delayed by
approximately 2 seconds via output relays, effectively suppressing any possible power-on
noise, which otherwise might be heard through the loudspeakers. PROTECT-LED lights
up and fans are at high speed during this delay. This indicates all protections are working
fine.
2.4 Mounting
SL amplifiers have been designed for installation in a conventional 19-inch rack case. Attach the power amp with its frontal
rack mount ears using 4 screws and washers as shown in following illustration.
Additionally securing the amplifier at the rear becomes necessary, if the rack case in which the power amplifier has been
installed will be transported. Failure to do so may result in damage to the power amplifier as well as to the rack case. Attach
the power amp as shown in the illustration using 4 case nuts and screws. Brackets for securing the power amplifier are
available as accessories.
2.5 Ventilation
As with all Dynacord power amps with fan cooling, the airflow direction is front-torear, obviously because there is more cold air outside of the rack case than inside.
The power amplifier remains cooler and dissipating the developing waste heat in a
specific direction gets easier. In general, setting up or mounting the power amplifier
has to be done in a way that fresh air can enter unhindered at the front and
exhausted air can exit at the rear. When installing the power amp in a case or rack
system, attention should be paid to these details to provide sufficient ventilation.
Allow for an air duct of at least 60 mm x 330 mm between the rear panel of the
power amplifier and the inner wall of the cabinet/rack case. Make sure that the duct
reaches up to the cabinet’s or the rack case’s top ventilation louvers. Leave room
of at least 100 mm above the cabinet/rack case for ventilation. Since temperatures inside of the cabinet/rack case can easily
rise up to 40 °C during operation of the power amp, it is mandatory to bear in mind the maximum allowable ambient
temperature for all other appliances installed in the same cabinet/rack case.
CAUTION:
Blocking/closing the power amp’s ventilation louvers is not permissible. Without sufficient cooling/ventilation, the power amplifier may automatically enter protect mode. Keep ventilation louvers free from dust to ensure unhindered airflow.
Do not use the power amplifier near heat sources, like heater blowers, stoves or any other heat
radiating devices.
To ensure trouble-free operation, make certain that the maximum allowable ambient
temperature of +40°C is not exceeded.
8 Owner‘s Manual
STANDARD PRECISION SERIES
2.6 Groundlift
The ground lift switch allows for eliminating noise loops. When operating the power amplifier together with
other equipment in a rack case, setting the switch to the GROUNDED position is recommended. Set the
switch to UNGROUNDED, when the power amplifier is operated together with appliances with differing
ground potentials.
2.7 LPN-Filter
The patented LPN (Low-pass notch) filter corrects the frequency and phase response of the connected
loudspeakers. This effect can not be reached using equalizers or „Bass-Boosters”, because the LPN filter
mainly optimizes the rise time of the audio signal. Switch the filter ON or OFF for evaluation of the actual
effect that the filter has on the sound. The sound is getting more powerful, especially when using fullrange
speakers (e.g. 12/2, 15/2) or subwoofers. For large systems (e.g. controlled via DC‘s DSP 260) using the
LPN filter is not recommended.
2.8 Selecting the Mode Of Operation and Audio Output Cabeling
The MODE switch on the power amp‘s rear panel defines how the audio inputs handle the input signals. Possible settings are
DUAL, PARALLEL or BRIDGED.
DUAL
In DUAL mode, the two channels of the power amplifier work independent from each other. This mode of
operation is being used for all 2-channel applications, like stereo operation. Using the input level controls
on the power amp’s front panel allows independently adjusting the channels’ amplification.
PARALLEL
In PARALLEL mode, the inputs of channel A and channel B are directly electrically linked. The audio
signal has to be applied to the input connectors of channel A. Using the input level controls to
independently control the amplification of the two channels is still possible because only the channels’
inputs are linked. PARALLEL operation is the mode of choice, whenever the same input signal drives
multiple power amp channels of a large system installation.
CAUTION:
In PARALLEL mode, the input signal has to be fed to input channel A only.
Typical Speaker System Cabling
The first possibility in DUAL or PARALLEL mode
is to use the two Speakon-type connectors,
whereas speakers have to be connected to pins
1+ and 1– of the sockets. The correct connection
is also indicated at the amplifiers rear panel.
Bi-Amp Cabling
The second possibility for connecting the speakers when the
power amplifier is operated in DUAL or PARALLEL mode is to
only use the Speakon-type connector CHANNEL A and to
connect one speaker cabinet to pins 1+ and 1–, as described
above and the second cabinet to pins 2+ and 2– as shown in
illustration. Only pins 2+ and 2– of the Speakon CHANNEL A
connector are assigned. Proceeding like this facilitates the cabling
of speaker systems that are used in active 2-way operation (BiAmp). The correct connection is also indicated at the amplifiers rear panel.
Owner‘s Manual 9
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