Dynacord AM 12 User manual

BEDIENUNGSANLEITUNG
OWNER’S MANUAL
MODE D’EMPLOI
AM 12
360 W HIGH EFFICIENCY 2 WAY ACTIVE CABINET

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 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.
IMPORTANT SAFETY INSTRUCTIONS
For US and CANADA only:
Do not defeat the safety purpose of the grounding-type plug. A grounding type plug has two blades and a third grounding prong.
The wide blade or the third prong are provided for your safety. When the provided plug does not fit into your outlet, consult an
electrican for replacement of the absolete outlet.
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 location 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 (HAS TO BE REPLACED WITH ORIGINAL PART ONLY)
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. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4.Follow all instructions.
5. Do not use this apparatus near water. Do not expose this apparatus to dripping or splahing and ensure that no objects filled
with liquids, such as vases, are placed on this apparatus.
6.Clean only with a dry cloth.
7. Do not block any of the ventilation openings. Install in accordance with the manufactures instructions.
8.Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
9.Only use attachments/accessories specified by the manufacturer.
10. 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
9

Congratulations! With buying the DYNACORD AM12 you got yourself an active monitor system
that incorporates most advanced technology.
The AM12 is an active 2-way loudspeaker system that has been designed for use in stage-monitoring or
general sound reinforcement applications. The multitude of connection and setting facilities (MIC, LINE,
and AUX) allows using the AM12 in many creative ways. You can use the AM12 as on-stage monitor
speaker, small PA system or even for sound reinforcement during presentations and similar events.
Employing only quality speaker components and a sophisticated modern power amplifier design, the
AM12 generates outstandingly high sound pressure level offering maximum sound performance. The
integrated high-efficiency power amps provide 300W/4ohms for the Lo range channel and 60W/8ohms
for the Hi range channel, supplying sufficient output power and reliable operation for all your sound
reinforcement applications. The Extension Speaker Speakon-type connector allows connecting an
additional passive monitor, like the M12 or an external subwoofer and using the integrated Acoustic
ProcessingSectionprovidesallthecontrolsyouneedtoadjusttheAM12’ssoundtoindividualapplications
or acoustic conditions.
Unpacking and Warranty
Open the package and carefully take out the AM12. Remove the protection foil from the handle of the
appliance. Next to this owner’s manual the package also contains the mains cord, a cable pull-relief and
the warranty card. Please check whether the warranty card has been filled out entirely. Only a warranty
card with completely filled in information entitles you to make any warranty claims. The appliance comes
with a full 36 months warranty that is valid from the date of original purchase. Please alsokeep the original
invoice together with the warranty card.
Setup and Connections
To ensure safe and reliable operation, always place the AM12 on an even surface standing on its rubber
foot stands. When mounted on a tripod, please make sure that the system is firmly locked in place and
that the tripod has a stable stand. Do not cover the heat sink on the rear of the appliance during operation.
Otherwise, the AM12 will enter protect-mode because of thermal overload. This prevents thesystem from
being damaged but the sound reproduction is suspended until the system regains operational state. The
speaker output (EXTENSION SPEAKER) on the rear of the appliance is carried out via professional
SPEAKON-type high-performance connectors, which provide absolutely secure and reliable connection
of additional speakers. The pin-assignment of the female-type connectors is 1+(hot) and 1-(cold).
Before connecting the AM12 to the mains, please make sure that the value stated on the mains voltage
label which is located next to the appliance’s mains switch, complies to the voltage settings of your local
powersupply.Installingthesuppliedcablepull-reliefpreventsthatthemainscordgetsinadvertentlypulled
out of the mains socket.
For installing the cable pull-relief, please re-
move the screw as shown in the diagram.
Slidethecablepull-reliefoverthemainscord
andusethescrewtofixit to the AM12panel.
TABLE OF CONTENTS
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Quick Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Setup Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Block Diagramm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
DESCRIPTION
10

Quick Start
Please set all Acoustic Processing controls to their center position, before switching the AM12’s power
on.
Caution: Before switching the AM12’s power on, make sure to set the level controls to
their counterclockwise margin. Otherwise, this could result in extremely high acoustic
output, especially when the connected audio source is already playing. It is particularly
dangerous when a microphone is connected, because of the possibility of acoustic
feedback.
The input section of the AM12 allows the connection and mixing of three individual audio signal sources
(MIC, LINE, and AUX). MIC
1. Before connecting a microphone, turn the MIC
GAIN control all the way down (counterclockwise).
2. Connect a microphone via XLR-type cable to the MIC
input of the AM12.
3. Switch the microphone on and while speaking into the
mic slowly increase the MIC GAIN setting until the wanted
volume is achieved.
Caution: Too high level setting can result in acoustic
feedback. Therefore be careful when turning the MIC
GAIN control.
Under some circumstances it is possible to increase the
feedback threshold by lowering the mid range level using
the MIDs control.
4. Using the HI, MID, and LO controls lets you match the
sound according to acoustical conditions. Again, be sure
to keep the feedback threshold in mind. Whenever you
notice feedback noise after making a certain change,
decrease the setting of the control that you have just
used by a little bit.
LINE IN
1. Before connecting an audio signal source, always turn
the LINE TRIM control all the way down
(counterclockwise).
2. Connect an audio signal source (e.g. mixer, keyboard,
etc.) to the AM12’s LINE IN connector using a 0.25-inch
phone plug.
3. First, switch on the audio source and then slowly
increase the setting of the LINE TRIM control until the
desired volume is achieved.
4. Using the HI, MID, and LO controls lets you match the
sound to your liking.
AUX IN
1. Before connecting an audio signal source, always turn
the AUX LEVEL TRIM control all the way down
(counterclockwise).
2. Connect an audio signal source (e.g. CD/MD-Player or
Tape Deck) to the AM12’s AUX IN using a RCA
connector-type cable.
3. Switch on the audio source and then slowly increase
the setting of the AUX TRIM control until the desired
volume is achieved.
4. Using the HI, MID, and LO controls lets you match the
QUICKSTART
11

MIC
is an electronically balanced XLR-type input for connecting
low-impedance microphones. Basically, you are able to con-
nect any type of microphone to this input as long as you mind
the correct pin-assignment. It is also possible to connect con-
denser microphones, which automatically gets the needed
phantom power (+24V) from the AM12. Please also refer to
your microphone’s owner’s manual for additional information.
Caution: Before connecting or unplugging a microphone,
make sure to turn the GAIN control all the way down
(counterclockwise).This helpsto protectthe audienceand
you from unpleasing knack noise.
The MIC-input is not necessarily meant for the connection of
mixers, keyboard instruments or other electronic sound gene-
ratingsources. For better results, please use thedenLIN-input
instead.
MIC GAIN
This control is used to set the volume of the connected micro-
phone within an adjustment range of -∞to +40dB.
Caution: Extremely high volume setting may result in
unpleasing feedback noise!
LINE IN
is an electronically balanced input for connecting high-impe-
danceaudiosignalsourceslikemixers,electronicmusic instru-
ments like keyboards, guitars and bass guitars with built-in
active electronics. It is possible to connect balanced as well as
unbalanced gear at the LINE-input using monaural or stereo
phoneplugcables.Balanced connection viastereophoneplug
cables is preferable whenever the source unit has a balanced
output stage. Following this advice will provide you with the
advantage of less interference that is introduced from external
hum of HF-induction.
Caution: Before connecting or unplugging devices, make
sure to turn the LINE TRIM control all the way down
(counterclockwise).This helpsto protectthe audienceand
you from unpleasing knack noise.
LINE OUT
The LINE OUT socket provides the carried through audio
signal from the LINE IN connector. It can be used to feed
additional external equipment (e.g. an additional AM12) with
the identical input signal.
LINE TRIM
This control serves for setting the input level of the signal
sourcethatisconnectedto LINE INwithinanadjustmentrange
of -∞to +6dB.
CONTROLS
12

AUX IN
These RCA-type connectors allow the connection of stereo
signal sources (e. g. CD/MD-Player, Tape Deck,...). The ste-
reo input signals are internally summed for monaural output.
Caution: Before connecting or unplugging an appliance,
makesure toturntheAUXLEVELcontrolall thewaydown
(counterclockwise). This helps to protect the audience
and you from unpleasing knack noise.
AUX LEVEL
Thiscontrolisusedtoadjusttheinputlevelofthesignalsource
that is connected to AUX IN.
ACOUSTIC PROCESSING
TheACOUSTICPROCESSINGsectionisnotwhatyouwould
call the ‘usual’ sound control section, like the ones found on a
mixer for instance. What’s more, the ACOUSTIC PROCES-
SING section provides the possibility to very efficiently match
the desired sound of the AM12 to existing acoustic conditions.
Using the controls lets you alter the AM12’s frequency respon-
se up to the margins as shown in the below diagram. When
altering the sound, it is always good advice to start with all
controls set to their neutral positions - all controls centered -
and to adjust their setting by cautiously turning the controls.
HI control
The HI control allows amplifying or attenuating the high-fre-
quency range of the signal by ±10dB.
MID control
Turned all the way to the right (clockwise), the MID control is
set to its neutral position, i.e. the signal’s mid-frequency range
is unaltered. Set the control to its counterclockwise margin for
6dB attenuation. Therefore the MID control provides a way to
efficiently prevent acoustic feedback noise. The MID control’s
cutoff frequency is at 4 kHz. Experience has shown that with
most set-ups in this frequency range feedback noise tends to
occur.
LO control
The LO control incorporates the DYNACORD’s patented Lo-
Pass notch filter. Using the LO control lets you increase the
audio signal’s low frequency range level. The signal is unalte-
red when the LO control is set to its neutral position, i.e. turned
all the way down (counterclockwise). Setting the control to its
clockwise margin causes a level increase of 12dB.
CONTROLS
13

STATUS INDICATORS
These indicators provide information about the integrated po-
wer amplifier’s actual status.
When the AM12 is powered-on, the POWER will light. In case
the LED does not light after switching the power on please
make sure that the mains cord is plugged in correctly. When
the POWER LED still does not light although the mains con-
nection is correct, please contact your dealer.
When theLIMIT LED lights, this is an indication that the power
amplifier is operated at its limit. Short-term blinking is not
critical, since the integrated limiter circuit controls occurring
distortion within the power amplifier. When the LED is con-
stantly lit, this can result in sound degradation and you should
reduce the output level.
ThePROTECTLED willlightwhenoneofthepoweramplifier’s
comprehensive protection circuits like the temperature over-
load protection, HF-protection, DC-protection, and the Back-
EMF-protection is activated. In Protect Mode, the loudspeaker
outputsaremutedviathespeakerrelaysandtheaudiosignal’s
input level is automatically attenuated to protect the power
amps from being damaged. When the AM12 enters Protect
Mode, first check the EXTENSION SPEAKER output for exi-
sting short-circuits. If necessary unplug the SPEAKON-type
loudspeaker cable from the appliance. Maybe you have con-
nected more than one speaker cabinet to the output.
Whenswitchingthepowerof theAM12on,thePROTECTLED
willlightfor approximately2seconds.Thisisnormal,indicating
that the entire protection circuitry is operational.
POWER
1. Mains connection via rubber connector
2. Mains fuse socket
3. Mains-switch for Power-On/Off
EXTENSION SPEAKER
Full-range loudspeaker output for the connection of passive
cabinets like the DYNACORD M12 or C15SUB. The output is
carried out as a professional standard SPEAKON high-perfor-
manceconnection.Thismechanicalandelectricalsecurecon-
nection complies with all safety standards allowing the use of
high-quality speaker cables with diameters of up to 4 x 2.5mm.
The Extension SPEAKER output provides the possibility for
connecting a single cabinet with an impedance of 8 ohms.
Connecting several cabinets does not necessarily cause da-
mage to the integrated power amplifier but it might activate the
internal protection circuitry.
WARNING:
The speaker output terminals are marked with a symbol
“”, which signifies that these terminals present a
shock hazard to the user.
Make connections to these terminals as described in the
owner’s manual.
Plugs,jacks,andhigh-qualityloudspeakercablesareavailable
from DYNACORD’s accessory assortment.
CONTROLS
14

CABLING
Loudspeaker cable - Experience has shown that cable with rubber jacket, a diameter of 2.5mm2 per
conductor, and SPEAKON-type plugs and jacks represent the optimal speaker connection solution.
Connect the SPEAKON-type connectors on the rear panel of the AM12 according to the example in the
diagram. DYNACORD loudspeaker cables that have SPEAKON-type connectors as well as any other
types of cable are available from your dealer.
LF-cord
For connecting audio signal sources to the AM12, we recommend using cable with balanced XLR-type
or stereo phone plug connectors. Using balanced cable reduces the risk of sound degradation resulting
frominterference.However,makesuretomindthepin-assignmentasshownbelow.OriginalDYNACORD
cable from our accessory program will always comply with this pin-assignment.
XLR MALE XLR FEMALE
balanced connecti-
on of microphones
external equipment
with XLR-type
in/output jacks
unbalanced
balanced
external equipment
with XLR-type
in/output jacks
unbalanced
balanced
CABLING
15

Monitoring mit AM12 und M12 am Extension Output
Monitoring with AM12 and M12 on Extension Output
PA mit 2xAM12 und 2x Subwoofer / PA with 2xAM12 and 2x Subwoofer
PowerMate 1000 mit AM12 als Monitor / PowerMate 1000 with AM12 Monitor
LINE
OUT
AUFBAUBEISPIELE / SETUP EXAMPLES
23

Technical Specifications: AM12
Amplifiers at rated conditions, 4 ohms loads on fullrange- and 8 ohms loads on hf-amplifier,
acoustic control in 0-position, unless otherwise specified.
Fullrange Amplifier High Frequency Amplifier
Minimum Load Impedance
External Speaker 8 ohms -
Maximum Midband Output Power
THD=1% 300W (1kHz) 50W (10kHz)
Rated Output Power
THD<0.2% 250W (100Hz - 20kHz) 40W (3kHz - 20kHz)
Max. Output Power
Dynamic-Headroom, IHF-A 450W 60W
Maximum RMS Voltage Swing
THD=1% 46.8V (1kHz) 23.3V (10kHz)
THD at rated output power,
MBW=80kHz < 0.1% (1kHz) < 0.1% (10kHz)
IMD-SMPTE
60 Hz, 7 kHz < 0.2% -
DIM30
3.15 kHz, 15 kHz < 0.1% -
Frequency Response
-1dB, ref. 1 kHz 30Hz - 30kHz 12.5kHz - 57kHz
Power Bandwith
THD=1%, half power 14Hz - 20kHz 2kHz - 68kHz
Slew Rate 24V/µs 17V/µs
Signal to Noise Ratio
A-weighted 104 dB 105dB
Power Consumption
at 1/8 maximum output power @ 4ohms 170W
Input Sensitivity
at rated output power @ 1 kHz MIC: -34dBu
LINE : 0 dBu
AUX: -3dBu
Input Impedance
20Hz ... 20 kHz, balanced MIC: 1.3kohms
LINE: >10kohms
AUX: 8kohms (unbalanced)
Phantom Power 24V dc
Power Requirements 230V, 50Hz
Protection Audio limiters, High temperature, DC, HF, Back-EMF,
Peak current limiters, Inrush current limiters, Turn-on delay,
speaker protection
Cooling convection cooled
Safety Class I
Dimensions (W x H x D), mm 530.5 x 355 x 344
Weight 21kg
24

Abmessungen / Dimensions (in mm)
BLOCK DIAGRAM AM12
25

GARANTIE
Das Werk leistet Garantie für alle
nachweisbaren Material- und Ferti-
gungsfehler für die Dauer von 36
Monaten ab Verkauf.
Garantieleistungen werden nur
dann anerkannt, wenn gültige, d.h.
vollständig ausgefüllte Garantieun-
terlagen vorliegen.
Von der Garantie ausgenommen
sindalleSchäden,diedurchfalsche
oder unsachgemäße Bedienung
verursacht werden. Bei Fremdein-
griffen oder eigenmächtigen Ände-
rungen erlischt jeder Garantie-
anspruch.
WARRANTY
The manufacturer’s warranty co-
vers all substantial defects in mate-
rials and workmanship for a period
of 36 months from the date of
purchase.
Liability claims are accepted solely,
whenavalid–correctlyandcomple-
tely filled out – Warranty Registrati-
on form is presented by the original
owner of the product. The warranty
does not cover damage that results
from improper or inadequate treat-
ment or maintenance. In case of
alteration or unauthorized repairs,
the warranty is automatically termi-
nated.
GARANTIE
La garantie constructeur couvre
tous les défauts matériels et de
main d’œuvre pour une période de
36 mois à compter de la date
d’achat. La garantie ne sera recon-
nue que si la Carte de Garantie,
correctementetcomplètementrem-
plie, est présentée par l’acheteur
d’origine du produit. Les dommages
dus à un mauvais maniement de
l’appareil, à un traitement ou une
maintenance incorrects ou ina-
déquats ne sont pas garantis. Toute
modification ou intervention effec-
tuéeparunepersonnenon qualifiée
entraîne la résiliation automatique
de la garantie.
GmbH • Hirschberger Ring 45 •94315 Straubing •Telefon [phone] •Telefax [phone]
Änderungen vorbehalten. Subject to change without prior notice. Printed in Germany 17. 04. 2000 / 358 206
Internet: http:// www.dynacord.de