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Cinema Ultra SUB 300-THX

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

  • Smallest THX Ultra 2-certified single subwoofer in the world
  • 32 cm high-performance woofer supported by two 32 cm passive membranes
  • Integrated Class D amplifier with 550 watts RMS and 1,100 watts of maximum power output
  • Extremely sturdy MDF cabinet with solid 45 mm baffle
  • Solid, dynamic bass for home cinemas up to 18 Hz

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

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

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Technical specifications

  • THX Ultra2-certified active high-performance subwoofer
  • Dual passive radiator
  • 320 mm Woofer
  • 2 x 320 mm passive radiator
Output power (RMS/Max.)
  • 550 / 1100 watts
Frequency Response
  • 18 - 200Hz
Crossover Frequencies
  • THX: without filtering Line-Modus: 40-180 Hz
  • 0° to 180° continuously variable
Dimensions (WxHxD)
  • 468 x 461 x 460 mm
  • 468 x 461 x 478 mm (incl. amplifier)
  • 32,5 kg
Cabinet surface
  • Front: black silk matt / body: textured film - anthracite


  • 30 cm high-performance long-stroke woofer, 30 cm long-stroke passive diaphragms with selber Membran
  • Flow-optimised, highly stable die-cast aluminium cage to avoid compression effects and resonances
  • Double-magnet high-power drive system with inductivity control ring for extremely low distortion
  • Extremely large linear hub for maximum signal purity with large deflections
  • Multiple-ventilated high-performance voice coil for high resilience
  • Multiple coated paper diaphragm and dust cap for ideal rigidit
  • Low-loss rubber surrounds for woofer and passive diaphragms
  • 8 screw fixings for firm anchoring in the baffle
High-performance subwoofer
  • THX Ultra2-certifed subwoofer for the Magnat Cinema Ultra set
  • All of the chassis have been specially developed for the Cimema Ultra set in order to meet the very strict requirements of the THX Ultra2 standard
  • Top acoustic performance through individual components developed for high performance in all details
  • Non-ventilated design to eliminate any air-flow noise at high levels
  • Two long-stroke passive diaphragms adapted to the woofer and enclosure volume ensure deep extended bass without any background noise
  • Very stable, braced MDF enclosure with particularly low-resonance, 45 mm thick baffle
Cabinet surface
  • Front: black silk matt / body: textured film - anthracite
  • Active frequency range equalisation according to the strict THX Ultra2 guidelines
  • THX input and stereo inputs for flexible use in any surroundings
  • Adjustable volume, phase and crossover frequency (in stereo mode)
  • Auto stand-by and automtic switch-on for high user convenience
  • Low stand-by power consumption < 1 Watt
  • Class D high-performance amplifier specially developed for this subwoofer
  • Class D technology and a switch mode power supply ensure low heating and compact dimensions despite extemely high-efficiency performance
  • Real-time limiter minimises distortions and prevents overloading


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