Theatrus Series

Why does Theatrus use an AMT tweeter (Air Motion Transformer) for home cinema? Our engineers have been working on various materials for AMT tweeters since 2008. From this research, the AMT tweeter for the SuperTweeter series was developed from 2018. This AMT has an efficiency of 103dB paired with excellent fine resolution. For use in the new home cinema series, a special protective circuit was added to enable distortion-free sound even in large rooms with maximum dynamics.

What makes the Theatrus AMT tweeter so unique? There are basically two classes of tweeters: PA tweeters, which usually have a high efficiency of more than 100 dB, or HiFi tweeters, which often only have a low efficiency of 92 dB or less. Although PA tweeters can handle the high home cinema sound pressure levels, they then have a lower resolution and detail reproduction compared to HiFi tweeters. Therefore, using a PA tweeter for the Theatrus series was out of the question. So another solution had to be found and the AperionAudio AMT tweeter is the optimal result.

Midrange speakers have a particularly demanding task in home cinema. On the one hand, they should give structure and details to the sound image, on the other hand, their radiation characteristics must illuminate the entire row(s) of seats as ideally as possible. In addition, unwanted reflections on the wall, floor and ceiling should be prevented. In order to master this challenge, the Theatrus series relies on two specially arranged 2" dome midrange drivers. These are each equipped with a low-distortion 50mm voice coil. In the lower midrange, this ensures perfect impulse fidelity, especially at high power levels. In the upper midrange, the Domes then show their advantages with the extremely even radiation behavior and the unrivaled clarity in the sound.The special arrangement avoids reflections on the floor and ceiling, while a whole row of listening places can enjoy perfect sound next to each other.

It is a real challenge to produce a large woofer that has high efficiency on the one hand and achieves detailed sound quality on the other. This applies to all classic cone materials such as paper, aluminum, Kevlar or woven fiberglass. Instead, the woofers of the Theatrus series rely on a special Curv™ material from the German manufacturer Propex. This material combines important properties: It is light, stiff and has a high temperature resistance without water absorption. However, the decisive factor for the incomparably precise sound is the extraordinarily high modulus of elasticity (correlation between tension and expansion) and the high internal damping. The Curv™ material achieves all of these properties without the use of adhesives or resins, which is common with many other materials. This gives the woofers of the Theatrus series a decisive advantage: Because glue and resins can only be applied imprecisely in the manufacture of the chassis and therefore cause fluctuations in quality. Ultimately, the Curv™ woofers deliver exactly what the Theatrus line needs: high efficiency and at the same time outstanding sound quality in terms of fine resolution.

The 15-inch subwoofer driver developed by AperionAudio is designed as an ultra-long-throw chassis with maximum coarse and fine dynamics. The audiophile basic tuning of the chassis also ensures the highest level of detail when used in pure music systems.

The development of the driver is based on the acoustic advantages of an extended pole piece in the magnet system. However, our engineers went a step further and were able to optimize both the magnet structure and the pole piece. The result is significantly lower distortion values ​​and more effective voice coil cooling.

The membrane is made from a very strong, long-fiber cellulose blend to ensure the right dynamic stability and stiffness. The surround is made of a special NBR mixture (Nitrile Butadiene Rubber) and thus ensures more precise transient response. The large voice coil, high Xmax and vented pole piece enable clear and high-resolution dynamics without mechanical or thermal compression, even at the highest output levels. This also predestines it for the sound reinforcement of large rooms.