Audio Distribution Amplifier
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 Kramer VM1110XL 15 Balanced Stereo Audio Distribution Amplifier  US $528.00
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 Whirlwind DA2 Audio Distribution Amplifier US $480.99
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 Whirlwind DA 2 DA2 Audio Distribution Amplifier US $440.77
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 Sescom ADA 2 2x8 Audio Distribution Amplifier US $150.00
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 BCS audio distribution amplifier US $149.00
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 Kramer 105A 15 Stereo Audio Distribution Amplifier US $144.00
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 RDL Audio Distribution Amplifier RU DA4D balanced unbalanced RUDA4D 2x4 1x4 US $69.99
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 Shintron Model 316 Audio Distribution Amplifier Amp US $65.00
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 Shintron 311 Audio Distribution Amplifier US $59.99
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 Systemtrix 581E 3 4in 16 out audio distribution amplifier US $99.99
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 RDL TX MX2R Audio Mixer Distribution Amplifier US $39.00
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 Extron DA 6A 6x1 Stereo Audio Distribution Amplifier US $37.00
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A Glimpse At Some Of The Trendiest Wireless Toys
Latest-generation wireless audio products such as iPods, iPhones and wireless surround sound products claim to eliminate the cord while delivering crystal-clear audio. I will look at a few of the newest devices and technologies to find out how well they operate and in which conditions they work best.
A number of products come with wireless already built in while some others, specifically streaming audio products, frequently have optional wireless ability. Modern cell phones and MP3 players already come with support for wireless. iPhones and touch-screen iPods, for instance, have Bluetooth and WiFi.
Bluetooth is a relatively low-cost option but has some limitations which are frequently overlooked.
1) Short range
Bluetooth devices usually merely have a 30-foot range which restricts Bluetooth to single-room applications.
2) Audio compression due to limited data rate
Bluetooth offers a maximum reliable data rate of approximately 1 Mbps only. This rate is not large enough to broadcast uncompressed CD-quality audio. Therefore Bluetooth wireless devices use audio compression. The audio will be degraded to some extent as a result of the audio compression. For this reason higher-end audio equipment normally does not use Bluetooth wireless audio.
3) Audio delay
The audio will experience a delay of no less than 10 ms mostly because of the audio compression which is a dilemma for real-time audio applications but less critical for MP3 players.
4) No support of multiple headphones
Bluetooth does not support any number of headphones which might be a problem if you have a larger number of people who want to listen to headphones from a single transmitter device.
Another common protocol is WiFi which supports uncompressed audio but also has limitations simultaneously streaming to numerous receivers. It is convenient for streaming music from a PC because of the high availability but is in general not utilized in wireless headphone products because of the fairly high power consumption of WiFi.
While newest-generation wireless speakers and wireless amplifier products use proprietary digital technologies, low-cost products regularly still rely on FM transmission which is noisy and has high audio distortion and high susceptibility to radio interference.
More recent wireless audio protocols are based on digital transmission. This eliminates audio degradation. Some protocols also incorporate error correction to deal with interference from other wireless products.
Latest-generation wireless amplifiers employ uncompressed audio transmission. New protocols also permit streaming to an unlimited number of receivers. This enables whole-house audio distribution.
Some of these protocols support low-latency audio transmission which ensures that the audio of all speakers will be in sync in a multi-channel application. These wireless audio transmitters typically work at 2.4 GHz. There are also some products such as Amphony’s line of wireless audio devices that work at 5.8 GHz. Products that operate at 5.8 GHz have less competition from other wireless products than those using the crowded 2.4 GHz frequency band.
Wireless amplifiers offer different levels of audio quality, output power and standby power. Digital Class-D amplifiers offer high power efficiency of not less than 80%. They also have low standby power, typically less than 5 Watts. This reduces heat and keeps them cool during operation. Some digital amplifiers, on the other hand, have fairly high harmonic distortion. It is crucial to pick a wireless amplifier with low audio distortion. This will ensure good sound quality. High-quality amplifiers have audio distortion of 0.05% or less.
Thinking about buying a HDTV Video/Audio Dirstribution Amplifier for my HDTVs in my house. Will this work?
Okay, I have been given by a friend who knows nothing about these things a ,CE Labs HDTV Component Video/Audio Distribution Amplifier. The model is CE Labs AV 400 Comp.
It has 1 input for the Y, Pb, Pr, and L and R Audio and then 4 outputs of the Y, Pb, Pr, and L and R Audio. If I was to hook this up, would it send just the same signal to all other the tvs hooked up to it? Since im thinking whatever you input into this, it would output the same. Am I getting the gist of this correctly? Doing a lot of research on it, it seems companies use these for their display TVS and now these are being used in residential homes, but what would be the advantage of me using this in my home, besides sending a HD signal to all TVs hooked up, if I have to watch the same thing on each one...PLEASE HELP...
Yes, you are right. You have answered your
own question. What you put in is what you
get out...times four. This is a good unit, if
you have long runs from unit to set.
Audio Distribution Amplifier
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