Introduction; Dual Active 2-Way Powermax Controlled Amplifier; Equalizer Section; Lpn Processors - Dynacord PM2600 Owner's Manual

INTRODUCTION

Universal Controlled Power Amplifier For Professional Active 2-Way Systems With Sub Woofers

Dual Active 2-Way PowerMax Controlled Amplifier

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 ac-
complish professional active 2-way sound reinforcement installations incorporating full-range loudspeaker
systems and sub woofers. This controlled power amplifier provides an integrated PowerMax12 frequency
crossover, several processor-controlled functions, equalizers for matching the sound to acoustic necessi-
ties of the location or to the incorporated loudspeaker cabinets respectively, as well as extensive protection
circuitry. The four power amplifier blocks of the PM2600 are designed in "Linear Precision 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 Po-
werMax12* frequency crossovers optimally utilize the amplifiers powerful performance as well as the repro-
duction 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 crossover frequency is 110Hz. It employs an in-
tegrated, switchable 4kHz dip-equalizer which allows to match the mid-range frequency response to the
characteristics of several different full-range cabinets and to the requirements of individual acoustical envi-
ronments. The equalizer also provides the opportunity to accomplish a more discrete sound image in near
field applications. The "FLAT" position guarantees the most improved directive and intelligible reproduction
abilities of the sound reinforcement system providing optimal long-throw coverage. The level of the LO-chan-
nels 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 environmental requirements. The integrated Lo-Cut filter elimi-
nates 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 abi-
lities of small and medium size full-range loudspeaker cabinets and sub woofers. Together with the Power-
Max12 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 audible non-linearity. This con-
cept ensures absolutely distortion-free sound reproduction even at the highest playback levels and reliable
protection for all connected loudspeaker components.
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 sys-
tem. Four Thermal-Brain circuits simulate the thermal model of typical loudspeaker components, 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 speaker cables (PSS 404, PSS 415), active 2-way configurations with sub woo-
fers are easily realized - quick and reliable - since inadvertent mismatching LO and HI channels is virtually
impossible. The DYNACORD full-range cabinets of the FORUM Line Series employ a pin-assignment se-
lector switch on their rear panel. This feature offers the possibility to incorporate FORUM Line loudspeaker
systems either in active 2-way systems with sub woofers or in full-range applications without a problem.
Balanced XLR Inputs
Each electronically balanced XLR-type input is connected parallel 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
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