Several Guidelines To Help Select A Wireless Surround Sound Kit
Getting audio from your living room to your bedroom can be quite a challenge especially in houses which are not wired for audio. The following technologies are used by devices solving this problem: infrared, RF, wireless LAN and powerline.
Infrared wireless audio devices are restricted to line-of-sight applications, i.e. only work within a single room since the signal is broadcast as infrared light which cannot penetrate walls. This technology is frequently found in wireless speaker kit products.
RF wireless products broadcast the music as RF waves - either by using FM transmission or digital transmission - and can as a result without difficulty transmit through walls. FM transmission is economical but rather prone to static, audio distortion and susceptible to interference.
Wireless LAN (WLAN) products are practical when streaming from a PC but will add some amount of latency or delay to the signal since wireless LAN was not originally designed for real-time audio streaming. WLAN receivers often do not have built-in network access. As a result, such products often require purchasing separate LAN cards. These cards are then plugged into each receiver.
Products utilizing wireless LAN are useful when streaming audio from a PC. Their disadvantage is that they usually have some fairly high latency, i.e. the signal will be delayed by some amount since wireless LAN was not specifically designed for real-time audio streaming. WLAN receivers usually require purchasing a separate LAN card to be plugged into each receiver.
Powerline products utilize the power mains as a medium to send the audio. These products typically offer excellent range. On the other hand, they face problems if there are a number of separate mains circuits in the house. In this situation the signal will have problems crossing between these circuits. 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 speakers has to be in sync with other non-wireless speakers or video. Now we'll give you some pointers for shopping for a wireless system: Go for a system that supports multiple wireless receivers if you plan to stream audio to a number of rooms so that you don't have to purchase a separate transmitter for every receiver. Selecting a product with some sort of error correction will help mitigate against strong RF interference. Such interference can be caused by other wireless transmitters. Pick a digital RF transmitter to maintain the original audio quality, preferably one with an audio latency of less than 10 ms in case of video or other time-sensitive applications.
Choose a transmitter that has all the audio inputs you need, such as speaker inputs, line-level RCA inputs etc. Select a system where you can add receivers later on which offer all of the required outputs, e.g. amplified speaker outputs, RCA outputs etc. Since you may want to connect the transmitter to several sources, you should choose a transmitter that can be adjusted to different signal volume levels to prevent clipping of the audio signal inside the transmitter converter stage.
Make sure that the amplified wireless receivers contain built-in digital amplifiers with low distortion figures. This will keep the receiver cool due to high amplifier power efficiency and provide optimum sound quality. Make sure the receivers can drive speakers with your desired Ohm rating. Picking a product where the wireless receivers have a small footprint and easy mounting options will help during the set up. Devices which operate in the 5.8 GHz frequency band will have less problems with wireless interference than products utilizing the crowded 900 MHz or 2.4 GHz frequency band.
Getting audio from your living room to your bedroom can be quite a challenge especially in houses which are not wired for audio. The following technologies are used by devices solving this problem: infrared, RF, wireless LAN and powerline.
Infrared wireless audio devices are restricted to line-of-sight applications, i.e. only work within a single room since the signal is broadcast as infrared light which cannot penetrate walls. This technology is frequently found in wireless speaker kit products.
RF wireless products broadcast the music as RF waves - either by using FM transmission or digital transmission - and can as a result without difficulty transmit through walls. FM transmission is economical but rather prone to static, audio distortion and susceptible to interference.
Wireless LAN (WLAN) products are practical when streaming from a PC but will add some amount of latency or delay to the signal since wireless LAN was not originally designed for real-time audio streaming. WLAN receivers often do not have built-in network access. As a result, such products often require purchasing separate LAN cards. These cards are then plugged into each receiver.
Products utilizing wireless LAN are useful when streaming audio from a PC. Their disadvantage is that they usually have some fairly high latency, i.e. the signal will be delayed by some amount since wireless LAN was not specifically designed for real-time audio streaming. WLAN receivers usually require purchasing a separate LAN card to be plugged into each receiver.
Powerline products utilize the power mains as a medium to send the audio. These products typically offer excellent range. On the other hand, they face problems if there are a number of separate mains circuits in the house. In this situation the signal will have problems crossing between these circuits. 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 speakers has to be in sync with other non-wireless speakers or video. Now we'll give you some pointers for shopping for a wireless system: Go for a system that supports multiple wireless receivers if you plan to stream audio to a number of rooms so that you don't have to purchase a separate transmitter for every receiver. Selecting a product with some sort of error correction will help mitigate against strong RF interference. Such interference can be caused by other wireless transmitters. Pick a digital RF transmitter to maintain the original audio quality, preferably one with an audio latency of less than 10 ms in case of video or other time-sensitive applications.
Choose a transmitter that has all the audio inputs you need, such as speaker inputs, line-level RCA inputs etc. Select a system where you can add receivers later on which offer all of the required outputs, e.g. amplified speaker outputs, RCA outputs etc. Since you may want to connect the transmitter to several sources, you should choose a transmitter that can be adjusted to different signal volume levels to prevent clipping of the audio signal inside the transmitter converter stage.
Make sure that the amplified wireless receivers contain built-in digital amplifiers with low distortion figures. This will keep the receiver cool due to high amplifier power efficiency and provide optimum sound quality. Make sure the receivers can drive speakers with your desired Ohm rating. Picking a product where the wireless receivers have a small footprint and easy mounting options will help during the set up. Devices which operate in the 5.8 GHz frequency band will have less problems with wireless interference than products utilizing the crowded 900 MHz or 2.4 GHz frequency band.
0 nhận xét:
Post a Comment