Showing posts with label surround sound. Show all posts
Showing posts with label surround sound. Show all posts
Speaker Soundbars
What are speaker soundbars?
With the advent of flat panel TV’s; plasma & LCD, a new type of home theater loudspeaker has emerged. Speaker Soundbars can deliver 2,3 or 5 channel surround sound. Typically they position all three front channels, left center and right into one box. Speaker soundbars can be made of metal, molded plastic or even wood. They are usually flatter in depth then conventional speakers and almost always come with a way to attach the speaker to a wall. The advantage of the speaker soundbar is that it takes up less space and can usually blend into the décor.
Types of speaker soundbars
Passive speaker soundbars.
This type of soundbar includes 1 or several speakers for each of the front channels, left, center and right. There is a speaker connection for each channel on the back of the speaker. A passive soundbar speaker needs an amplifier or receiver since it has no built in power amps. The passive soundbar usually needs a surround receiver to produce the center channel results.
Picture of Boston Acoustics 2.1 Soundbar with subwoofer...no surround but a very neat wireless subwoofer at an attractive price.
Active speaker soundbars
Active speaker soundbars will have the same configuration as the passive soundbars but will include a built in amplifier and surround sound processer to separate the center channel sound. The advantage of an “active” soundbar is that it does not require a bulky amplifier to produce the basic front channels of surround sound. This can give you an incredibly clean Flat Panel (LCD) TV installation with the minimum of wires. Even though these speakers have surround amplifiers built into them they usually will not have outputs for rear channel surround.
Active speaker soundbars with DSP (Digital Signal Processing)
This is the most sophisticated type of soundbar speaker. Besides having 3 speakers and a 3 channel amplifier it includes a Digital Signal Processor. The DSP enables the soundbar to take the surround sound signal and create the illusion of rear and side surround sound WITHOUT the need for additional speakers! Some of these speaker do an incredible job of reproducing surround material.
Buying a speaker soundbar for a flat panel TV
Given that they are relatively new, prices for sound bars are all over the place. In general the passive soundbars are the cheapest, the active soundbars cost more and adding DSP will bring the price up even more.
All types of speaker soundbars could increase your enjoyment of watching TV with the addition of a center channel and the convenience of not having to fiddle with costly and often hard to use surround sound receivers.
Some resources for the newest soundbars
On-Wall Soundbars in TWICE Magizine
More on Soundbars
For Quality speakers at Half the Price visit The Speaker Company at http://www.thespeakercompany.com
With the advent of flat panel TV’s; plasma & LCD, a new type of home theater loudspeaker has emerged. Speaker Soundbars can deliver 2,3 or 5 channel surround sound. Typically they position all three front channels, left center and right into one box. Speaker soundbars can be made of metal, molded plastic or even wood. They are usually flatter in depth then conventional speakers and almost always come with a way to attach the speaker to a wall. The advantage of the speaker soundbar is that it takes up less space and can usually blend into the décor.
Types of speaker soundbars
Passive speaker soundbars.
This type of soundbar includes 1 or several speakers for each of the front channels, left, center and right. There is a speaker connection for each channel on the back of the speaker. A passive soundbar speaker needs an amplifier or receiver since it has no built in power amps. The passive soundbar usually needs a surround receiver to produce the center channel results.
Picture of Boston Acoustics 2.1 Soundbar with subwoofer...no surround but a very neat wireless subwoofer at an attractive price.
Active speaker soundbars
Active speaker soundbars will have the same configuration as the passive soundbars but will include a built in amplifier and surround sound processer to separate the center channel sound. The advantage of an “active” soundbar is that it does not require a bulky amplifier to produce the basic front channels of surround sound. This can give you an incredibly clean Flat Panel (LCD) TV installation with the minimum of wires. Even though these speakers have surround amplifiers built into them they usually will not have outputs for rear channel surround.
Active speaker soundbars with DSP (Digital Signal Processing)
This is the most sophisticated type of soundbar speaker. Besides having 3 speakers and a 3 channel amplifier it includes a Digital Signal Processor. The DSP enables the soundbar to take the surround sound signal and create the illusion of rear and side surround sound WITHOUT the need for additional speakers! Some of these speaker do an incredible job of reproducing surround material.
Buying a speaker soundbar for a flat panel TV
Given that they are relatively new, prices for sound bars are all over the place. In general the passive soundbars are the cheapest, the active soundbars cost more and adding DSP will bring the price up even more.
All types of speaker soundbars could increase your enjoyment of watching TV with the addition of a center channel and the convenience of not having to fiddle with costly and often hard to use surround sound receivers.
Some resources for the newest soundbars
On-Wall Soundbars in TWICE Magizine
More on Soundbars
For Quality speakers at Half the Price visit The Speaker Company at http://www.thespeakercompany.com
Placement of Surround Sound Speakers
Surround speaker placement is challenging. If you’re using a pair of bookshelf speakers, you have two options.
>>> Diagram of surround sound speakers for music listening
If you’re a movie mogul (or just enjoy ‘em), mount the surround speakers on the side walls flanking your primary listening/viewing position. Make sure they’re slightly behind your couch or chair and at least 1.5 to 2’ above ear level.
>>> Diagram for surround sound speaker placement for movies 5.1 system (without subwoofer)
Surround Sound Speaker Placement for Music
Multi-channel music is usually mastered in a studio with direct radiating speakers placed in pre-determined spots. The standard for surround sound speaker placement calls for them to be on or close to the back wall, so my placement suggestion for surround sound speakers is to place them on the back wall facing the front speakers. With music, the artists and producers want you to hear where the sounds are coming from so the best way to do that is to use monopoles (speakers that radiate in only one direction) aimed directly at the listener. That way, you can tell that the rhythm guitar is back left while the lead guitar is front center (or whatever . . . ).
Movie soundtrack reproduction is a different beast. Originally, surround sound info in a theater was reproduced by an array of speakers located along the side walls. (Still is, at least in most theaters). Thus, the surround information was not firmly placed in space – you could tell it was there but you weren’t supposed to know exactly where “there” was. Remember that most movie surround information is what’s called “ambient” information – crickets, wind, rainfall, leaves rustling, etc. – and didn’t carry any really important cues.
The whole point of home theater is to try to “shrink” the theatrical experience so we can enjoy movies at home. One of the ways to duplicate the aural atmosphere is to make sure that we can’t precisely locate the source of this ambient information. THX originally specified dipole speakers for surround use as they presented a very diffuse, non-localized soundfield. The only way to do this with direct radiating monopole speakers is to locate them so they aren’t aimed directly at you. That way, the sound bounces off of walls and ceilings enough to confuse the ear/brain combination so that it can’t figure out exactly where the sound is coming from.
Hence my suggestion that the surround speakers go slightly behind the prime listening/viewing position and well above ear level.
Movie soundtrack reproduction is a different beast. Originally, surround sound info in a theater was reproduced by an array of speakers located along the side walls. (Still is, at least in most theaters). Thus, the surround information was not firmly placed in space – you could tell it was there but you weren’t supposed to know exactly where “there” was. Remember that most movie surround information is what’s called “ambient” information – crickets, wind, rainfall, leaves rustling, etc. – and didn’t carry any really important cues.
The whole point of home theater is to try to “shrink” the theatrical experience so we can enjoy movies at home. One of the ways to duplicate the aural atmosphere is to make sure that we can’t precisely locate the source of this ambient information. THX originally specified dipole speakers for surround use as they presented a very diffuse, non-localized soundfield. The only way to do this with direct radiating monopole speakers is to locate them so they aren’t aimed directly at you. That way, the sound bounces off of walls and ceilings enough to confuse the ear/brain combination so that it can’t figure out exactly where the sound is coming from.
Hence my suggestion that the surround speakers go slightly behind the prime listening/viewing position and well above ear level.
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