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Thomann's Cool Online Guides: PA Speakers

2. Overview

There is a bewildering variety of speakers to choose from. Each manufacturer produces ranges to suit all kinds of uses and budgets, including active speaker systems with built-in amplification, passive monitors, and huge horns. All speakers, however, apply the same principles in their basic function.

A typical driver

Probably the most familiar type of speaker is the cone driver, in which a cone-shaped diaphragm is attached to a voice coil with a magnet hanging behind it. The electrical signals reaching the driver cause the coil to move backwards and forwards through the magnetic field, in turn causing the cone to push sound waves through the air.

Drivers like these are generally measured by their diameter, the rule being that the larger the diameter of the driver, the more low frequency tones it will produce. Small speakers are therefore used for high frequencies, mid-sized speakers handle the mid-range sound, and large speakers deliver the bass. We’re in the realm of applied physics here - the lower the frequency, the longer the sound wave, and the harder it is to push the sound through the air. Just as you need a big paddle to move a large boat, you need a big cone to move a big sound.

How big?

Generally, speaker diameters are measured in inches. The most widely used sizes are 12" (30 cm), 15" (38 cm), and 18” (46 cm). In practice, the dimensions used when installing a speaker may be different, but most standard specifications refer to the maximum diameter of the driver.

Some speakers feature a bonded second cone which adds strength for high and mid-range frequencies. These are often used for multiple speaker systems and stage monitors because they can handle a broader range of frequencies.

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Terms and Conditions for participation
in online competitions

Note: Participation in an online competition runs independently from any purchase at Musikhaus Thomann GmbH. The following Competition Rules apply when participating in any online competition run by Musikhaus Thomann:

  1. Competition

    1. The competitions are organised by Musikhaus Thomann e. K., owner: Hans Thomann, Treppendorf 30, 96138 Burgebrach, Germany.
  2. Participation

    1. Competitions are only open to persons of full age.
    2. To take part in the competition you must answer all questions correctly, fill in the registration form and submit your entry to Musikhaus Thomann e. K. by pressing the "send" button.
      By pressing the "send" button the participant accepts the aforementioned terms and conditions.
    3. The participant is responsible for entering their email and/or postal address correctly. Entries to the competition will be logged electronically.
  3. Qualifying Entrants

    1. Staff of Musikhaus Thomann e. K. and any cooperation partners and their dependants are excluded from participation.
    2. Should these conditions of participation be violated, especially by using illegitimate means, Musikhaus Thomann e. K. reserves the right to exclude persons from the competition. In case of such violations prizes can be withdrawn and claimed back subsequently.
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    1. The winners will be notified by Musikhaus Thomann e. K. by email or in writing and their names may be published on the homepage www.thomann.de. The winner accepts this form of publication explicitly.
      Should for whatever reason the winner not claim their prize, then a new winner will be drawn.
    2. The prize presented to the winner may not be identical to the item description. There can be deviances regarding the model, colour etc.
    3. The merchandise prizes will be sent by Musikhaus Thomann GmbH or by one of its contracting delivery companies, per freight forwarder, courier or postal service to the postal address indicated by the winner.

      The delivery is free of charge. Only extra transport costs and customs/duties must be covered by the winner. In the case that the delivery has to be made through a freight forwarding company the freight forwarding company will contact the winner to arrange delivery timings.
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      Musikhaus Thomann e. K.
      to the data protection officer
      Treppendorf 30
      96138 Burgebrach, Germany
    2. Musikhaus Thomann e. K. is obliged to consider the regulations for data protection according to the Federal Data Protection Law (BDSG) valid at the conclusion of the competition. In this context the general data protection regulations under notes regarding data protection should be noted.
  6. Liability

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    2. Musikhaus Thomann e. K. is not liable for the insolvency of a cooperation partner and the resulting consequences for the implementation and processing of the competition.
  7. Other

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Our groupies
I received my gm55 microphone yesterday. It works brilliant and is just as good as my old one.
pxxx@awesomemerchandxxx.com, 22.06.2015

PA Speakers overview