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PowerH SERIES
Owner’s Manual 35
4 Options
Installing one of the optionally available extension modules in the extension slot on the rear panel lets you
expand the power amp’s functional range. As an example, the following paragraphs describe all aspects of
the RCM-26 Remote Control Module in detail. Please read and follow the instructions provided in the
owner’s manuals that you have received together with each extension module.
4.1 RCM-26
System Description
The RCM-26 Remote Control Module is a two-channel digital controller module for live sound
reinforcement, PA and fixed installation applications. Installing the RCM-26 turns a conventional amp into a
remote amplifier, which, at any time, provides complete overview of the overall system status and control
of all system parameters.
RCM-26 modules allow the integration of PowerH amplifiers into a remote control network with up to
250 units. This offers the possibility to control and monitor an entire PA system from one or more PCs
using the IRIS-Net™ - Intelligent Remote & Integrated Supervision - software package. All operational
states, e.g. power-on status, temperature, modulation, limiting, activation of protections, deviation from the
load impedance, etc., are centrally registered and displayed in IRIS-Net™. This provides the possibility to
react and to selectively intervene even before critical operational states arise. Programming an automatic
reaction, when specific thresholds are being exceeded or fallen below, is also possible.
With an RCM-26 installed, the integrated impedance testing function allows very precise monitoring of the
connected loudspeaker systems. The impedance testing function utilizes the internal test tone signal
generator and voltage/current measuring to determine the impedance of the loudspeaker systems
including crossovers and cables over the entire frequency range. IRIS-Net™ plots an impedance curve of
the measured impedance that can be compared with a formerly stored reference curve at any time. This
reveals even smallest loudspeaker defects or deficiencies instantly. The impedance testing function is
optimized for low impedance loads, like typical loudspeaker cabinets and/or loudspeaker components.
All parameters, like power on/off, level, muting, filters, etc. can be controlled in real-time and stored in the
amplifier. Besides controlling and monitoring amplifiers, the RCM-26 also offers all conventional signal
processing functions, like parametric equalizers, frequency crossovers, delays, compressors and limiters.
Beyond that, linear-phase FIR-filters, zero-latency FIR-filters and digital speaker protection algorithms are
available to optimize the amplifiers and loudspeaker system. All DSP-settings can be freely edited and
stored in user presets directly on the module. In the event of network failure or loss of power, all settings
(filters, delay, level, etc.) stay intact, independent of the control by the network.
Furthermore, the RCM-26 provides a control port with freely programmable control inputs and control
outputs. Control inputs (GPI's) allow the connection of switches. IRIS-Net™ offers the possibility to
program a variety of logic functions for the inputs (e.g. switching to an alarm-preset with maximum energy
in the speech area). Control outputs (GPO's) allow the connection of external components, which, for
example, are used to signal specific states to peripheral equipment. Consequently, an amplifier with a
RCM-26 module installed corresponds to highest safety requirements.
The RCM-26 has been designed with uncompromising audio quality in mind. Analog audio inputs
(internally) and an AES3 (AES/EBU) digital audio input with XLR-type connector are provided. The use of