Wireless Surround Sound – Does It Free Your Speakers?
An increasing number of vendors has started to offer wireless speakers for home theater systems or a separate wireless surround sound kit. Multi-channel audio is still a relatively new phenomenon. As such in older homes which are not pre-wired for rear speakers, not to mention 7.1 speakers, a wireless option seems like the logical conclusion. But how reliable are these wireless surround sound kits and do they really eliminate the dreaded cable clutter?
Looking at some of the available options for wireless surround sound kits, you’ll notice that most of these systems, such as the products from LG or Rocketfish, will connect two speakers to a wireless receiver unit. Thus while these systems eliminate the speaker cable from the front of the room to the back, there still is a significant amount of speaker cable to run. A better choice would be a product, such as the wireless surround sound kit from Amphony, which offers separate wireless receivers for each speaker thus offering a much cleaner installation.
The big question is: do these wireless systems have any impact on audio quality? When choosing a wireless surround sound kit, one should prefer a system where the audio is transmitted digitally. This will ensure that the signal does not pick up noise during the transmission. Another consideration is the quality of the audio amplifier inside the wireless receiver. A good-quality amplifier will have minimum audio distortion and high efficiency. Also, picking a small-size wireless receiver will help hide it from view.
Another issue to consider is that in a home theater setting is that the sound to all speakers should be in sync with the video and also in sync with each speaker. Some wireless units such as the Rocketfish will introduce a delay in the signal, apparently to cope with interference. As such you should investigate how much the signal travelling to the wireless speaker will be delayed. The Amphony product however specifies a delay of less than 1 ms which should be low enough for pretty much any real-world application. Finally, how reliable are wireless speakers and wireless surround sound kits?
But how well do these wireless kits work in a real-world scenario? One of the biggest concerns should be interference from other wireless devices. In the US, wireless devices are restricted to a limited number of frequency bands. Especially the 900 MHz and 2.4 GHz frequency band are increasingly crowded by WiFi, Bluetooth and an array of other devices making interference more of a concern. Picking a system working at an alternate frequency band such as the 5.8 GHz band would naturally reduce the impact from competing devices.
In addition to connecting rear speakers in a home theater setting, another useful application of a wireless surround sound kit is setting up speakers wirelessly in another room in cases where installing speaker wire between different rooms presents a challenge or for setting up speakers in your backyard within minutes. The applications are endless.
Yamaha YAS-70 Front Surround Sound System
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