A subwoofer (or ‘sub’) is a woofer, or a complete loudspeaker typically between 8 inches and 21 inches in diameter, which is dedicated to the reproduction of low-pitched audio frequencies (the bass). The first subwoofers were developed in the 1960s to add bass response to home stereo systems. With the advent of the compact cassette and the compact disc in the 1980s, the reproduction of deep, loud bass was no longer limited by the ability of a phonograph record stylus to track a groove and producers could add more low frequency content to recordings.
Subwoofers use speaker drivers (woofers) typically between 8 inches and 21 inches in diameter. Why do diesel internal combustion engines require no spark plug to ignite the fuel unlike petrol engines? Enter your email address to subscribe to this blog and receive notifications of new posts by email. Significantly smaller than 12” subwoofers of other manufacture, the SW1112 delivers outstanding sonic performance and Yamaha reliability.
The SW1112 is easy to handle with flexible installation and includes 12 x M10 rigging points, two handles, a pole socket, NL4 and barrier strip connectors.


Subwoofers are constructed by mounting one or more woofers in a well-braced wood or plastic enclosure. Subwoofers came into greater popular consciousness in the 1970s with the introduction of Sensurround in movies such as ‘Earthquake,’ which produced loud low-frequency sounds through large subwoofers. As well, during the 1990s, DVDs were increasingly recorded with ‘surround sound’ processes that included a Low Frequency Effects (LFE) channel, which could be heard using the subwoofer in home theater systems.
Some car audio subwoofers have a 22 inches diameter and single prototype subwoofers as large as 60 inches have been fabricated. The subwoofer features 2800 watt input capacity with peak 127 dB sound pressure level output. Subwoofers have been designed using a number of speaker enclosure designs, including bass reflex (with a port or tube in the enclosure), infinite baffle, horn-loaded, and bandpass designs, each of which has advantages and disadvantages in efficiency, size, distortion, cost, and power handling.
On the smaller end of the spectrum, subwoofer drivers as small as 4 inches may be used, depending on the design of the loudspeaker enclosure, the desired sound pressure level, the lowest frequency targeted and the level of permitted distortion. Ideal for smaller, full-ranged IS models, Yamaha IS1112W is the perfect subwoofer to achieve naturally extended low-end response in models used for primary delivery.


The company has a dedicated dealer network, intensive field training, and 24-7 tech support in the U.S.
Passive subwoofers have a subwoofer driver and enclosure and they are powered by an external amplifier. The Yamaha IS Speaker Series has achieved much success in installations requiring seamlessly-integrated hardware, meeting the expectations of contractors and end users requiring superior audio quality, and ease of installation and system design.
The new subwoofer has a direct connection to full-range units without the need for special speaker cables.



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