Magnat THX SUB 300

18 hertz and no end of acoustic pressure Certified by THX®

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The Cinema Ultra Sub 300-THX subwoofer also amazed the THX engineers: It is the smallest woofer so far to have been awarded THX Ultra2™ certification. Here, too, the basis for the record is the very latest technology. The 32 cm high-performance driver is optimised for a large stroke and minimal distortions. For power right from the bottom - the Cinema Ultra Sub 300-THX goes all the way down to 18 Hertz! – the subwoofer is supported by two passive radiators of the same size and appearance. Together with the newly developed 550 watt Class D power amp, they are located in a compact, extremely sturdy enclosure where the baffle alone, made of 45 mm thick MDF, effectively suppresses a lot of vibrations.



Technical Data



THX® Ultra2-certified active high-performance


Dual passive radiator


320 mm subwoofer

2 x 320 mm passive radiator

Output power (RMS / Max.)550 / 1100 watts
Frequency Response

18 - 200 Hz

Crossover FrequenciesTHX: without filtering Line-Modus: 40-180 Hz
Phase0° to 180° continuously variable
Recommended Amplifier Output> 40 watts
Dimensions (WxHxD)

468 x 461 x 460 mm

468 x 461 x 478 mm (incl. amplifier)
Weight32.5 kg
Cabinet surface

Front: black silk matt /

body: textured film - anthracite





  • A perfect bass machine – also for non-THX applications
  • 32 cm high-performance long-throw woofer with flow-optimised, highly stable die-cast aluminium cage