computer hardware, electronic components, consumer electronics  
Generally, the loudspeaker system comprises a woofer for reproducing low-frequencies, a squawker for reproducing midrange-frequencies, and a tweeter for reproducing high-frequencies. A common limitation of loudspeaker systems, particularly those intended for high quality stereo sound reproduction, is relatively inadequate low frequency performance. In response to the increased low frequency sound in recordings, a growing number of audio systems are adding an additional type of loudspeaker to their existing array of loudspeakers. This type of loudspeaker is known as a subwoofer. Subwoofers are specialized loudspeakers which reproduces the lowest bass frequencies in music and sound. Adding a subwoofer to an audio system relieves the full range loudspeaker from reproducing the lowest frequencies, thereby improving its performance. Subwoofers are designed to be either powered or passive. In the powered or active variety, the sub-woofer system has a built-in power amplifier to drive the sub-woofer speaker. Powered sub-woofers are used in applications where a local amplifier of a stereo or home entertainment system is limited in its output power and cannot drive the sub-woofer to its full efficiency. Passive subwoofers rely on the amplifier of the audio source to drive the sub-woofer audio driver. Passive sub-woofers are generally not able to produce the same sound level as powered sub-woofers due to the limited output power of most conventional stereo amplifiers. Powered or active sub-woofers include a class-AB audio power amplifier to drive the speaker.

Listings on Audio electronics : Speakers and subwoofers : Subwoofers

  • ETO Technology Ltd.
    Manufacturer of 2.1 subwoofers, multimedia speakers, 5.1 home theatre, RF wireless optical mouse, keyboards, and power supply. China.
  • Hangzhou Jinlu Electronics Co., Ltd.
    Manufacturer of subwoofers, speakers, car speakers, PA speaker boxes, speaker drivers, speaker enclosures, and component kits. China.
  • Ningbo Rixing Electronics Co., Ltd.
    Manufacturer of woofers, subwoofers, ceiling speakers, guitar amplifier, professional speaker system, and tweeter speakers for cars and boom boxes. China.
  • Sunfire Corporation
    Manufacturer of subwoofers, stereo and home theater amplifiers, preamplifiers, and receivers. USA.
  • Ultimate Sound
    Manufacturer of loudspeakers, subwoofers and amplifiers. Canada.
  • Velodyne Acoustics, Inc.
    Manufacturer of high-performance, low distortion powered subwoofers for audio and home theater applications. USA.

Lamps, light bulbs, lighting fixtures

2009 Electronics manufacturers directory • (Subwoofers section) • Site map