4 Channel Amp For Subwoofer
4 Channel Amp For Subwoofer
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Do You Need A Subwoofer?
Since it is tough for small-sized loudspeakers to reproduce frequencies under 40 Hz, and really tough for under 100 dB, people often choose to use a loudspeaker just for this purpose. Hence the subwoofer, a kind of loudspeaker that reproduces bass frequencies ranging most generally from roughly 20 Hz to around 200 Hz. DO you need one? Depends upon how well you want to hear deep bass, if your music or audio is reproduced under 40 Hz.
Subwoofer drivers, known as woofers, average between 8" and 15", and can run 34" even. And drivers begin at 4" those under 8" generally don't reproduce lower frequencies with good quality and usually have higher distortion.
Use high-powered amps with subwoofers and an electronic crossover with a low-pass filter. There are two types of subwoofers; those with an amp in the subwoofer cabinet (active), and those without the amplifier (passive). Typically active subwoofers will be clearer and stronger.
Home Theater
With regards to the use of subwoofers in home theater systems, they come mounted in a sealed enclosure. Some people like to focus attention of their systems around satellite speakers, hiding their subwoofer; hence it may be packaged within the system. Others build the subwoofer into the theater cabinet.
Why the separation? To keep them out of site, for one thing. Plus for sensitivity issues dealing with the areas' sound compatibility and mode. Some people prefer to place the subwoofer near the listener.
Bottom line is, if you want to be able to hear low frequencies, you need a subwoofer. If you don't care, don't' worry about it then.
When will this come into play? Lower frequencies are needed with older sound formats, like with vinyl records replaced with digital formats, like CDs, mainly with 5.1 formats Dolby Digital and DTS (where the ".1" channel is for the bass frequencies, for the subwoofer), common choice of mixed artists.
About the Author
Hyun Kim is a freelance writeer who writes about home audio & home theater topics. He loves to visit Stereo|411 to read about Home Theater stores & to discuss at bose home theater systems.
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Sundown Audio SAX 100.4 4channel amp for the work truck
4 Channel Amp For Subwoofer Questions
Three Widespread Subwoofer Failure Causes
Usage, tear and wear are not the only causes of failing subwoofers. There are in fact many reasons why subwoofers fail. Because of their complex design and cheaper subs using short lasting material, subwoofers can often die within their first few years, particularly if used heavily. Like any highly used electronic product, car subwoofers can fail at times, but also can be fixed.
A common is cause of subwoofer failure is the lack of power, which is caused by not enough amperage reaching the electromagnet coil, in turn causing the permanent magnet and electromagnetic coil to interact differently. This obviously drastically alters the way the subwoofer works and stops the subwoofer from doing its job. Check that that amp is channeling enough power to your woofer and make sure it is a compatible amp for you sub.
Another widespread problem is overheating. Like any electronic product, if used intensely, it is bound to overheat. Although the first time the product overheats, it may not cause obvious problems, it can if repeated cause long term problems to your subwoofers. It may cause damage to the woofers components, in turn causing the subwoofer to stop functioning. To avoid overheating subs, when purchasing subwoofers look out for a sub with a ventilation system, which will keep your system cool. Also, always place your subwoofer in a ventilated area, avoid compacting close together with other audio components and don't place in an area without much air flow, such as the boot.
A prevalent cause of subwoofer failure is the short circuit, which causes that vital signal never to reach its destination, the sub, causing the sub to fail. The most lethal short circuit is the short circuit at the terminal of the subwoofer. It stops the electrical current and signal ever reaching the sub, meaning no power and in turn no sound can be produced. Short circuits in the subwoofer coil are also a common determiner of sub failure. Coil short circuits often mean there is not enough power to drive the cone, stopping the correct movement that is needed to produce the sound. Short circuits can be annoying, but may be fixed by a professional depending on the damage.
If you are interested in replacing your subwoofers, or adding a subwoofer to your car audio system for the first time, take a look at the West Midlands based car audio experts at www.bassjunkies.com
About the Author
Marie Coles is a professional writer. She writes informative, yet, dynamic articles on car audio.
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Filed under 4 channel amplifier by on Oct 9th, 2010. 
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