A glimpse at the most recent cordless speaker kit models.

| Thursday, August 4, 2011
By Gunter Fellbaum


Recently more and more manufacturers have started to offer home theater systems with wireless speakers or a wireless surround sound kit. From a homeowners standpoint, eliminating long speaker cable runs is certainly a big plus. Multi-channel surround sound is a fairly new phenomenon and as such many older houses are not wired for rear speakers, not to mention 7.1 systems. As such a wireless solution might be the logical conclusion. But how reliable are these wireless surround sound kits in a real-world scenario and do these options really eliminate the dreaded cable clutter?

Looking at available wireless surround sound kits, you will notice that most of them, such as the products from Rocketfish or LG will connect two speakers to a wireless receiver unit. As a result, such systems, while eliminating the speaker cable from the front of the room to the rear, do not really eliminate speaker cable but only reduce it. As such products with separate wireless receivers for each speakers, such as the product from Amphony, offer a much cleaner solution since each receiver can be attached directly to the speaker of choice.

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.

In a surround sound application, such as a home theater setting, the audio from each speaker naturally should be in sync with the video and also with the audio of the other speakers. Some wireless surround sound kits, such as the product from Rocketfish, will introduce a significant delay to the signal. Therefore when choosing a wireless surround sound kit, it is important to look closely at how much latency the wireless unit will introduce. The Amphony product adds a little less than 1 ms delay which should be sufficiently low for pretty much any application.

One of the main issues with wireless devices of any sort is interference from other devices. As more and more consumer devices go wireless, the available frequency space becomes more and more limited. Especially the 900 MHz and 2.4 GHz bands are exceptionally crowded, due to WiFi hot spots, cell phones with Bluetooth etc. Picking a system that avoids these frequency bands may be the logical choice, such as systems working at 5.8 GHz.

Aside from using a wireless surround sound kit in a home theater environment, another useful application for wireless systems is streaming audio between different rooms of the home where wiring would be difficult to install or for outdoor applications. Just imagine being able to set up your speakers in your backyard in a matter of minutes. The possibilities are endless.




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