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We are frequently asked how to protect loudspeakers effectively via limiter. Most common loudspeaker controllers (like Omnitronic’s DXO-series) have an integrated limiter which is mostly not used or not used correctly.

In the following tutorial, we would like to show you how to adjust the limiter based on speaker-system and power amplifier.

For doing so, we need the following data:

– Speaker-system RMS-power and impedance

– Power amplifier voltage gain

As an example, we use several Omnitronic PAS-speaker-systems and the Omnitronic SMA-2000 power amplifier.

The popular Omnitronic PAS-212 has an RMS-power of 300 watts and an impedance of 8 ohms. By using the ohm’s law we can calculate which voltage is sent to the speaker-system at full output.

The formula is power P = Voltage U squared / Resistance R. By converting we get: Power P x Resistance R = Voltage U squared.

With values: 300 x 8 = 2400 Read more »

In the audio world more and more beats a digital heart – as in many OMNITRONIC products. Here is a small selection – if you have questions you can always contact our sales team.

OMNITRONIC EX-820 Digital-Effects-Mixer
Modern mixer from today. Mixing is still the basic feature, but the EX-820 enables mixing of both line as well as USB sources. Besides, the EX-820 offers DJs the possibility to take influence on the songs played. Thanks to the integrated DSP section, 8 digital and BPM-synchronized effect presets in 24-bit quality can be routed as desired. Effects are: Echo, Auto Pan, Flanger, Manual Filter, Auto Filter, Reverb, Transition, Pitch Shifter. The 3 crossfader effects (Echo, Zip, Roll) with automatic or manual crossover function are helpful as well. Find out more here…

OMNITRONIC TMC-3 Interface inkl. VDJ
Standard for the digital DJ. This MIDI controller is delivered with integrated sound card and the audio software Virtual DJ 7 LE. With this device you can play and mix the audio files on your computer directly from the TMC-3 (an analog use without computer is possible as well). Operation is alleviated by the two jog wheels which convince through a first-class workmanship and comfortable haptics. Find out more here…

OMNITRONIC PR-1 Pocket-Recorder
Example for the advantages of digital technology. The big keyword is mobility. In the end you can record MP3 and WAV files with this pocket recorder, anywhere you want and at any time – whether at a jam session, a live concert or an impulsive idea for a melody. With an SD (HC) card you can save 32 GB of data. And despite the size, the sound of the record is really high-class. Find out more here…

We want to complete the list of tools described in the first part. We start with equalizers – also a vital part of oudspeaker controllers. The frequency range of a PA-system can easily be corrected with fully parametric equalizers. While mixer equalizers are mostly semi-parametric, i. e. only amplitude and frequency can be changed, a fully parametric equalizer can also change the filter bandwidth or shape of the bell. Consider that a high filter bandwidth (Q-factor) equals a small bandwidth and vice versa. As already mentioned, too harsh adjustements of the frequency response have to be avoided because the phase problems make the positive effects of the correction void. Here, less is often more!
Read more »

Digital loudspeaker controllers are the heart of every modern PA-system. Controllers assign the matching signal to every speaker, balance inconsistencies in the frequency range and protect the system from overload.

Loudspeaker controllers normally consist of these three important components:

– the hardware including the connectors and interfaces, the transducers, the operating elements and the housing.

– the firmware includes algorithms for signal processing, i.e. equalizers, crossovers, limiters and delays.

– the software providing a graphical surface on the user’s computer for adjusting all controller functions and settings and manage complete setups. Read more »

What kind of amplifier serves what purpose? We enlighten you with our models.

EDP series:
The low-weight EDP series with switch mode power supply is designed for average PA requirements. It boasts optimal space-saving installation dimensions, most suitable for bars, music pubs, restaurants and as expansion of existing systems and for compact mobile systems. Read more »