lundi 6 janvier 2014

A Number Of Good Tips To Help Decide On A Cordless Surround Sound Kit

By Scott Humton


Some Secrets To Help Select A Cordless Surround Sound System

Recently more and more wireless surround sound transmitter devices have emerged which claim to bring the ultimate freedom of broadcasting music throughout the home. We will check if these newest products are suitable for whole-house audio. Also, we will give vital suggestions for choosing a wireless audio system. Getting audio from your living room to your bedroom can be quite a challenge especially in buildings which are not wired for audio. There are several technologies solving this problem. These include infrared wireless, RF wireless, wireless LAN (WLAN) and powerline.

Infrared is limited to line of sight because the audio signal is broadcast as lightwaves and as a result products utilizing this technology, such as infrared wireless surround sound products, are restricted to a single room.

Infrared products send the audio as lightwaves. Light cannot go through walls. Therefore devices utilizing infrared, such as wireless surround sound kits, are limited to a single room. RF wireless products will broadcast the signal as RF waves. These waves can without difficulty penetrate walls. RF wireless audio products either use FM transmission or digital audio transmission. The least expensive choice is FM transmission. Products using FM transmission, on the other hand, have a series of drawbacks. These include degradation of the audio quality due to static or hiss and audio distortion. In addition, FM transmitter products are also fairly prone to interference from other wireless transmitters.

Digital wireless audio transmitter devices, such as products from Amphony, utilize a digital protocol. The audio is first converted to digital data before being broadcast. This conversion and transmission in the digital domain will make sure that the original audio quality is preserved. However, this is only the case of the data is sent uncompressed. Some wireless audio transmitters will apply some form of audio compression. Such products include Bluetooth audio transmitters. Audio compression will degrade the quality of the audio to some degree.

Powerline products broadcast the audio via the power mains and provide great range. They run into problems in homes where there are separate mains circuits in terms of being able to cross over into another circuit. Also, these products build in a delay of a number of seconds to safeguard against transmission errors during power surges and spikes which prevents their use in applications where the audio from wireless loudspeakers has to be in sync with other non-wireless speakers or video.

Powerline devices use the power mains to distribute music and provide great range but run into trouble if there are separate mains circuits in the house in terms of crossing between circuits. Another challenge facing powerline products are strong power surges and spikes. Such surges can cause dropouts in the audio due to errors in the transmission. To safeguard against these errors, powerline products typically build a delay of several seconds into the transmission.

Select a transmitter that has all the audio inputs you need, such as speaker inputs, line-level RCA inputs etc. Get a wireless system where you can buy additional receivers later on. You should verify that you can get receivers for all the different applications you have. Such receivers may include amplified receivers for passive speakers or line-level receivers for active speakers. If you go with a digital audio transmitter, select one with an input audio level control knob to prevent the audio signal from clipping inside the transmitter audio converter. This will ensure optimum dynamic range regardless of the signal level of your equipment.

For high amplifier power efficiency and best sound quality, check that the amplified receiver has a built-in low-distortion digital amplifier. Make sure the receivers can drive speakers with your preferred Ohm rating. Choosing a product where the wireless receivers have a small footprint and easy mounting options will help in the course of the installation. Devices which work in the 5.8 GHz frequency band will have less problems with wireless interference than devices utilizing the crowded 900 MHz or 2.4 GHz frequency band.




About the Author:



Aucun commentaire:

Enregistrer un commentaire