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Higher power, higher efficiency MOSFETs meet Class D audio amplifier needs500W Class D subwoofer amplifier boosts audio performanceMOSFETs to give that home theater soundAudio amplifier boards give true hi-fi sound with better than 0.2% distortion and noiseClass D audio amplifier gives a virtuoso performance
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Press releases - Audio

For press releases prior to this date contact: marcom@zetex.com

Articles - Audio

  • 500W subwoofer design using Class D technology
    • With active subwoofers demanding typical power levels up to 500W, building the amplifiers to meet the requirement is not without difficulty. Consider using a 50% efficient Class AB amplifier, and it's not hard to imagine a power source that generates masses of heat, is very large, heavy and prohibitive in cost.
  • Class D audio - meeting the design challenge
    • Developed to tackle the design constraints imposed by many of today's audio system requirements, the latest in Class D audio amplifier chip overcomes the problems associated with this class of amplification and enables development of some very high quality amplifiers.
Date: June 2006
Title: Higher power, higher efficiency MOSFETs meet Class D audio amplifier needs
Synopsis: A new generation of trench MOSFETs from Zetex Semiconductors has been introduced to provide the high efficiency, cool running and quality audio reproduction demanded by Class D output stages.

Date: April 2005
Title: 500W Class D subwoofer amplifier boosts audio performance
Synopsis: Achieving THD+N figures of better than 0.05% from 1W up to 90% full power, a 500W RMS into 4Ω analog input Class D reference design from Zetex is setting new standards of audio performance in active subwoofers. Backed by a single channel evaluation board - the ZXCD500MOEVAL " the design also demonstrates how amplifier cost and size can be significantly reduced.

Date: February 2002
Title: MOSFETs to give that home theater sound
Synopsis: Zetex has launched a series of four N and P-channel MOSFETs providing all the performance demanded by Class D audio systems. The 35V breakdown voltage of the parts ensures they readily deliver up to 100W to a 4Ω speaker.

Date: July 2001
Title: Audio amplifier boards give true hi-fi sound with better than 0.2% distortion and noise
Synopsis: Built around the ZXCD1000 switching amplifier controller, two new evaluation boards from Zetex provide complete mono and stereo Class D audio amplifiers attaining total harmonic distortion plus noise (THD+N) ratings of less than 0.2% in open loop, reducing to a typical of 0.05% in a closed loop configuration.

Date: December 2000
Title: Class D audio amplifier gives a virtuoso performance
Synopsis: The ZXCD1000 switching amplifier offers high efficiency, excellent audio quality (best in class THD + N), compactness, and low cost per watt. In combination with application specific output magnetics and Zetex HDMOS MOSFET devices, the ZXCD1000 provides a high performance Class D audio amplifier with all the inherent benefits of Class D. Efficiency is excellent, at greater than 90%. This enables a very compact solution requiring smaller power supplies and generating between much less heat than comparable Class A/B linear amplifiers. Depending on the choices of output bridge configuration, it provides true high fidelity performance at an output power between 20W and 100W. The new device is ideal for wide ranging audio applications, including DVD, home theater, powered speakers, PC multimedia, automotive audio, PA systems, and mini/micro hi-fi systems.