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Overview on subwoofer types


The human ear is mainly adapted to the frequency range where speech is transmitted. Frequencies below this frequency range are less noted although the same physical level is present. In practice, this effect requires higher bass power e. g. by more powerful subwoofers, more subs or a mixture of both. As speakers generally have a low efficiency comparable to a halogen lamp, manufacturers try to achieve the highest efficiency by optimized housing shapes. But not every housing shape is suitable for every event location and audience. The following article should help to find the suitable subwoofer type.

1. Introduction

The loudspeaker celebrates its 150th anniversary based on the invention of the telephone by Philipp Reis in the year 1861. Already in the year 1878, the electro-dynamic loudspeaker was patented. This kind of loudspeaker is still built into most speaker-systems today.

If such a loudspeaker is operated without housing, an acoustic short-circuit is produced because the sound waves produced by both membrane sides are eliminated by each other. The volume is clearly reduced, especially the lower frequencies. A pragmatic use is not possible like this so that diverse types of loudspeaker housings for different applications were developed. Read more »

Entertainment Mixer from Omnitronic

November 15th, 2011 Posted in OMNITRONIC Tags: , ,

Entertainment Mixer

Very high standards in quality and features for sound devices – this can often be found in the gastronomy industry. A branch including not only restaurants, but also hotels, bars or theme parks.

With its EM series Omnitronic has developed special devices for this industry. Mixers offering highest flexibility and quality in very small mixer casings.

The EM-series presents a variety of connection possibilities and also convinces by an ergonomic design and easy use.
A special housing design and the state-of-the-art construction are further reasons which make the EM-series the first choice for installers.

Here, an overview over Omnitronic’s Entertainment Mixers:

Item no. 10007071

2-channel/24 bit stereo mixer with two USB interfaces
OMNITRONIC EM-180 USB Entertainment-Mixer

Read more »


November 10th, 2011 Posted in OMNITRONIC Tags: , , , , , , ,

Omnitronic XMT-1400

Many wished for new tabletops from Omnitronic – now their wishes have been satisfied. The list starts with…

OMNITRONIC XMT-1400 Tabletop CD player.

OMNITRONIC XMT-1400 Tabletop CD playerHaste makes waste – true, it has taken us some time, but finally the first representative of Omnitronic’s tabletops is available. The XMT-1400 is a modern CD player offering numerous possibilities of digital DJing. Beside the classic CDs (Audio CD/CD-R/CD-RW/MP3-CD) the XMT also welcomes SD(HC) cards and USB storage devices and portable players.

There are many ways to take influence on the music material. Scratching via jog dial is obligatory. In addition to that the XMT offers a reverse run, a break effect, known from analog turntables, a double loop/reloop function and a pitching function. The music’s speed can be accelerated or reduced up to +/- 16 per cent.

A VFD display with a wide angle is responsible for the absolutely sharp illustration of signs and symbols. In combination with the illuminated buttons you always immediately know what’s going on on your workstation and you are able to run the XMT intuitionally. It’s worth a try!

Omnitronic Little Helpers – Part II

Little Helper

In the second part we’d like to present you the remaining “Little Helpers” from Omnitronic. After we have focused on DI-Boxes, isolators, cable testers and signal switchers in the first part, it’s now about mini mixers and preamplifiers.

First comes the passive mini mixer OMNITRONIC LH-010, that can distribute the signal of four audio sources to one output. That makes it possible to create simple submixes or small mixers which can be extended with some channels for an additional group, for example for multitrack recordings or spot microphones. Another possibility is the use on stages to connect multiple guitars at the same time to avoid switching and disturbing noises during a concert. Different output levels of several guitars can already be adjusted in the run-up to a performance. Due to its passive construction, the LH-010 can also be used as 1 to 4 splitter, for example to supply multiple active speakers with the same signal without looping through all speakers. With two LH-010 the output signal of a mixer can be split for further processing in different media (PA, webcam, records, etc). Read more »

Little Helper from Omnitronic – Part I

October 25th, 2011 Posted in OMNITRONIC, worth knowing Tags: , , , , , ,

Little Helper

Let’s talk about the so called „Little Helpers“ from Omnitronic. They have already simplified or even saved quite a few events. In the first part of our series we are concentrating on devices which can rather be found on live settings. Installation and studio environment are the topics of the second part.

It is probably the absolute classic assistant in event industry: the DI-Box (DI means “direct injection”, sometimes also “direct input”). On live stages the DI-Box has to complete three missions at once. First of all, impedance transformation. To directly supply a signal from keyboards, synthesizers, electric guitars or basses into the multicore and finally into the FOH mixer, the very high-resistant output impedance of these instruments has to be transformed. Normally, an electric guitar has an output impedance of several thousand ohms whereas a microphone features only a few hundred ohms. Now, the DI-Box, from a technical point of view, transforms an instrument signal into a microphone signal – thus preparing the signal for further processing in a mixer. The inputs of the instruments’ amplifiers are equipped accordingly and thereby don’t have to be supplied with a transformed signal. Because of this it is possible to simultaneously tap the input signal of the DI-Box and to feed it into the amplifier, which is mostly used as stage monitor. Read more »