Subwoofers are becoming even more important to the home theatre experience. When you visit your local theatre, you marvel not only at the images projected on the cinema screen, but the sounds emanating near you. What really grabs you, though, is definitely the sound most people feel; the heavy bass that shakes you up and gets you in the middle of your gut. A specialty speaker, known as a subwoofer, enhances this experience. The sub woofer is manufactured just to reproduce the lowest of audible frequencies.

Passive Subwoofers Passive subwoofers are powered by an outside amplifier, within the same fashion as other types of speakers in your system. The strong but subtle consideration here is that since extreme bass needs more electricity to reproduce low frequency sounds, your amplifier or receiver should be effective at output enough power to uphold bass effects in the subwoofer without depleting the amp. The amount of power is determined by what’s needed from the speaker and the size of the space (and exactly how much bass you are able to stomach!).

Powered Subwoofers In order to resolve the circumstance of inadequate power or other characteristics that might be lacking in a receiver or amplifier, powered sub woofers are self contained speaker/amplifier units while the characteristics of the amplifier and sub woofer are optimally harmonized. As being a side benefit, all a powered subwoofer needs is known as a line output from a receiver. This arrangement needs a lot of the power load away from the amp/receiver and allows for the amp/receiver to power the mid-range and tweeters with less effort.

Front-Firing and Down-Firing Bass speakers Front-firing sub woofers make use of a speaker mounted so that it radiates the sound within the front or side of the sub woofer enclosure. Down-firing sub woofers make use of a speaker thats generally mounted so that it radiates downward, on the floor.

Ports and Passive Radiators Some sub woofer enclosures also employ an extra port, which forces out quite a bit of air, maximizing bass response in a more efficient manner than sealed enclosures. Yet another kind of enclosure runs on the Passive Radiator along with the speaker, rather than a port, to increase preciseness and efficiency. Passive radiators can either be speakers having the voice coil removed, or else a flat diaphragm.

Cross-overs The crossover is an electronic circuit that tracks all frequencies below a precise point to the bass speaker; all frequencies above that point are reproduced to the main, center, and surrounding speakers. Typically, a very good bass speaker features a “crossover” frequency close to 100hz. Gone may be the need for those large 3 way speaker systems with twelve or fifteen inch woofers. Smaller satellite speakers, designed for mid-and-high frequencies, that take up a lesser amount of space and generally are now common in many home cinema systems.

Deep Bass is Non Directional In addition to that, since the deep bass frequencies reproduced by way of the subwoofers are non-directional (as frequencies which are at or below the threshold of hearing). It is extremely difficult for our ears to successfully pin-point the direction the location where the sound is originating from. That’s the reason we can only sense that an earthquake seems to be all over, rather from coming from a particular direction.

Subwoofer Placement Caused by the non-directional sound that is reproduced by the subwoofer, it can be placed anywhere in your room. However, the best results rely upon room size, furnishings, wall construction and floor type. Typically, best placement for a subwoofer is by the front of the room, simply to the left or right of the main speakers, or in a front corner of the room.

The Bottom Line Despite all the technical specifications and design aspects of subwoofers, the kind of subwoofer you select for your system relies upon the characteristics of your room along with your own preferences.

Now that you’ve got a concept about Subs, take account of all the subwoofer reviews. If all else fails, and you simply would like to buy a quality subwoofer, try them out here

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