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 external amplifier, within the same fashion as alternative speakers in your system. The top consideration here is that since extreme bass needs more electricity to reproduce low frequency sounds, your amplifier or receiver really should be capable to output enough power to sustain bass effects in the subwoofer with out draining the amp. Just how much power is dependent upon the needs from the speaker as well as the size of the space (and just how much bass you could stomach!).
Powered Subwoofers To eliminate the problem of inadequate power or other characteristics which may be lacking in a amplifier or receiver, powered sub woofers are self-contained speaker/amplifier units wherein the characteristics of your amplifier and subwoofer are optimally synchronised. As a side benefit, all a powered bass speaker or subwoofer needs is known as a line output from your receiver. This arrangement needs a lot of the energy load out 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 Subwoofers Front firing sub woofers make use of a speaker mounted in order that it radiates the audio through the side or front of the sub woofer enclosure. Down-firing sub woofers employ a speaker which is mounted so it radiates downwards, towards the floor.
Ports and Passive Radiators Some bass speaker enclosures utilize an additional port, which pushes out more air, improving bass response from a more efficient manner than closed enclosures. Yet another kind of enclosure runs on the Passive Radiator in addition to the speaker, instead of a port, to help improve preciseness and efficiency. Passive radiators either can 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 Aside from that, because the deep bass frequencies reproduced from the subwoofers are non-directional (as frequencies which are at or below the threshold of hearing). It's very difficult for our ears to actually pin-point the direction the location where the sound is coming from. Thats why we can only sense that an earthquake appears to be all around us, rather from coming from a particular direction.
Bass speaker Placement Because of the non-directional sound that is reproduced by way of the subwoofer, it can be placed any where in your theater room. However, the best results will depend on size of the room, furnishings, wall construction and floor type. Typically, best placement for a subwoofer is within the front of your room, just to the left or right of the main speakers, or even in a front corner of the room.
The Results Despite all of the technical specifications and design elements of subwoofers, the type of subwoofer you select for your personal system depends upon the characteristics of your room and your own preferences.
Passive Subwoofers Passive subwoofers are powered by an external amplifier, within the same fashion as alternative speakers in your system. The top consideration here is that since extreme bass needs more electricity to reproduce low frequency sounds, your amplifier or receiver really should be capable to output enough power to sustain bass effects in the subwoofer with out draining the amp. Just how much power is dependent upon the needs from the speaker as well as the size of the space (and just how much bass you could stomach!).
Powered Subwoofers To eliminate the problem of inadequate power or other characteristics which may be lacking in a amplifier or receiver, powered sub woofers are self-contained speaker/amplifier units wherein the characteristics of your amplifier and subwoofer are optimally synchronised. As a side benefit, all a powered bass speaker or subwoofer needs is known as a line output from your receiver. This arrangement needs a lot of the energy load out 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 Subwoofers Front firing sub woofers make use of a speaker mounted in order that it radiates the audio through the side or front of the sub woofer enclosure. Down-firing sub woofers employ a speaker which is mounted so it radiates downwards, towards the floor.
Ports and Passive Radiators Some bass speaker enclosures utilize an additional port, which pushes out more air, improving bass response from a more efficient manner than closed enclosures. Yet another kind of enclosure runs on the Passive Radiator in addition to the speaker, instead of a port, to help improve preciseness and efficiency. Passive radiators either can 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 Aside from that, because the deep bass frequencies reproduced from the subwoofers are non-directional (as frequencies which are at or below the threshold of hearing). It's very difficult for our ears to actually pin-point the direction the location where the sound is coming from. Thats why we can only sense that an earthquake appears to be all around us, rather from coming from a particular direction.
Bass speaker Placement Because of the non-directional sound that is reproduced by way of the subwoofer, it can be placed any where in your theater room. However, the best results will depend on size of the room, furnishings, wall construction and floor type. Typically, best placement for a subwoofer is within the front of your room, just to the left or right of the main speakers, or even in a front corner of the room.
The Results Despite all of the technical specifications and design elements of subwoofers, the type of subwoofer you select for your personal system depends upon the characteristics of your room and your own preferences.
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