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Description
The PM2600 4-channel controlled power amplifier provides an
overall output power capacity of 2600 watts into 4 ohms.
Although being suitable for universal use, the amplifier has
been mainly designed to easily accomplish professional active
2-way sound reinforcement installations incorporating full-ran-
ge loudspeaker systems and sub woofers. This controlled
power amplifier provides an integrated PowerMax12 frequen-
cy crossover, several processor-controlled functions, equali-
zers for matching the sound to acoustic necessities of the
location or to the incorporated loudspeaker cabinets respecti-
vely, as well as extensive protection circuitry. The four power
amplifier blocks of the PM2600 are designed in "Linear Preci-
sion Topology". This meanwhile legendary concept provides
highest audio quality with an output power capacity of 2 x 700W
/ 4 ohms for the LO-channels and 2 x 600W / 4 ohms for the
HI-channels. Up to three loudspeaker systems with a nominal
impedance 8 ohms each can be connected to each output
channel. The newly developed PowerMax12* frequency cross-
overs optimally utilize the amplifiers powerful performance as
well as the reproduction and transmission abilities of full-range
loudspeaker systems and sub woofers. Compared to conven-
tional frequency crossovers, this ensures outstanding sound
improvement with less effort. With a crossover frequency of
110 Hz, 12dB/octave, basically any full-range / sub woofer
combination can be operated.
Equalizer Section
The PowerMax12 frequency crossover's recommended cross-
over frequency is 110Hz. It employs an integrated, switchable
4kHz dip-equalizer which allows to match the mid-range fre-
quency response to the characteristics of several different
full-range cabinets and to the requirements of individual acou-
stical environments. The equalizer also provides the opportu-
nity to accomplish a more discrete sound image in near field
applications. The "FLAT" position guarantees the most impro-
ved directive and intelligible reproduction abilities of the sound
reinforcement system providing optimal long-throw coverage.
The level of the LO-channels can be set between -8dB and
+12dB in relation to the HI-outputs which also contributes to
the perfect matching of loudspeaker system models and envi-
ronmental requirements. The integrated Lo-Cut filter elimina-
tes unwanted sub-sonic noise.
LPN Processors
The integrated LPN (Low Pass Notch) audio processors are
responsible for linearizing the frequency and phase response
of the connected cabinets. These processors optimally match
the typical transmission abilities of small and medium size
full-range loudspeaker cabinets and sub woofers. Together
with the PowerMax12 frequency crossovers they produce a
tight and contoured sound image; especially with drums and
bass.
Dynamic Limiters
Four extremely fast audio processors continuously monitor the
internal and external operational state of the amplifier blocks,
activating the dynamic limiters on the occurrence of any audi-
ble non-linearity. This concept ensures absolutely distortion-
free sound reproduction even at the highest playback levels
and reliable protection for all connected loudspeaker compo-
nents.
Thermal Brain Circuits
In dynamic peaks, the Linear Precision power amplifier blocks
are capable of producing much higher output than the stated
700 watts. In return this guarantees the outstanding overall
dynamic range of the sound system. Four Thermal-Brain cir-
cuits simulate the thermal model of typical loudspeaker com-
ponents, limiting the energy that is fed to the speaker systems
during continuous overload.
Speakon Female-Type System Output Connectors
The SPEAKON-type loudspeaker output connectors directly
provide the LO audio signals (pin1+, pin1-) for the sub woofers
as well as the HI audio signals (pin2+, pin2-) for the connection
of full-range cabinets. Using 4-pole DYNACORD system spe-
aker cables (PSS 404, PSS 415), active 2-way configurations
with sub woofers are easily realized - quick and reliable - since
inadvertent mismatching LO and HI channels is virtually im-
possible. The DYNACORD full-range cabinets of the FORUM
Line Series employ a pin-assignment selector switch on their
rear panel. This feature offers the possibility to incorporate
FORUM Line loudspeaker systems either in active 2-way sy-
stems with sub woofers or in full-range applications without a
problem.
Balanced XLR Inputs
Each electronically balanced XLR-type input is connected par-
allel to an additional XLR-type socket, allowing to distribute the
input signal to external power amplifiers. It is also possible to
directly connect the inputs of channel "A" and channel "B" via
these sockets. A feature that is very practical when the set-up
contains two PM2600 - one for each side of the stage - and
identical audio signals are reproduced via channel "A" and
channel "B".
* Patents pending
Description
L'amplificateur de puissance contrôlé à 4 voies PM2600 dis-
pose d'une puissance de sortie globale de 2 600 watts sous 4
ohms. Bien qu'il soit d'un usage universel, cet amplificateur a
été principalement conçu pour réaliser facilement des installa-
tions de sonorisation professionnelles actives à 2 voies incor-
porant des haut-parleurs large bande et des sub-woofers. Cet
amplificateur de puissance contrôlé dispose d'un filtre Power-
Max12 intégré, de plusieurs fonctions contrôlées par proces-
seur, d'égaliseurs permettant d'adapter le son aux
caractéristiques acoustiques du lieu ou aux enceintes utili-
sées, ainsi que d'un circuit de protection très complet. Les
quatre blocs d'amplificateur de puissance du PM2600 sont
conçus selon une "topologie à précision linéaire" ("Linear Pre-
cision Topology"). Ce concept légendaire offre une qualité
audio des plus satisfaisante avec une puissance de sortie de
2 x 700W / 4 ohms pour les voies basses (LO) et de 2 x 600W
/ 4 ohms pour les voies aiguës (HI). Un maximum de trois
systèmes de haut-parleurs ayant une impédance nominale de
8 ohms chacun peuvent être connectés à chaque voie de
sortie. Les filtres, nouvellement développés, PowerMax12*
utilisent de façon optimale les caractéristiques de puissance
des amplificateurs ainsi que les caractéristiques de restitution
des systèmes de haut-parleurs large bande et de sub-woofers.
Comparé aux filtres conventionnels, il en résulte une amélio-
ration sonore significative obtenue avec moins d'efforts. Avec
une fréquence de coupure de 110 Hz, 12dB/octave, pratique-
ment n'importe quelle combinaison de HP large bande / sub-
woofer peut être employée.
Section Égaliseur
La fréquence de coupure recommandée pour le PowerMax12
est 110Hz. Il utilise un égaliseur commutable 4kHz intégré,
permettant de régler la réponse en fréquence des médium aux
caractéristiques de différentes enceintes large bande ainsi
qu'aux exigences de chaque environnement acoustique.
L'égaliseur offre également la possibilité d'obtenir une image
sonore plus discrète dans les applications à champ rapproché.
La position "FLAT" (plate) garantit une restitution avec un son
directif des plus satisfaisant et une excellente intelligibilité, ce
qui donne une couverture longue-portée optimale. Le niveau
des voies basses (LO) peut être réglé entre -8dB et +12dB en
relation avec les sorties des aigus (HI) qui contribuent égale-
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