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Fabricant : Amphony
Taille : 39.35 kb
Nom Fichier : FAQ_L1550.pdf
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The major drawback ist that this type of modulation is ‘analog’ which is the reason for the poor performance of analog transmitters. If you listen carefully to a CD over an analog wireless audio transmitter / amplifier, you will notice significant noise/static, low signal dynamics and low channel separation. Also, the signal quality will vary when you move around the room between the transmitter and receiver (the noise will increase locally and also the further the receiver is moved away from the transmitter). The transmitter uses something which is called ‚digital' modulation. The same way music is recorded on a CD using 1's and 0's, it is transmitted as 1's and 0's to the headphones. The result of this technology is that there is no audio quality degradation during transmission, i.e. you will hear the exact same audio quality as you would if the equipment was connected by a cord. Because of this digital technology, our transmitter / amplifier is very suitable for high-quality audio, such as music coming from a CD, DVD, digital satellite receiver etc. 2) Transmitter frequency: The second difference is the higher transmit frequency of 5.8 GHz. This frequency avoids possible interference from other appliances working either in the 900 MHz or 2.4 GHz range, such as cordless telephones or wireless LANs. 3) Built-in digital amplifier: The receiver features a built-in audio amplifier and can be connected directly to any regular loudspeakers without an additional amplifier. This amplifier is a digital amplifier which reduces the amount of heat which is generated due to the high efficiency of the amplifier. Therefore the size and weight of the amplifier is greatly reduced compared to conventional analog audio amplifiers. By using a feedback mechanism, the harmonic distortion performance of the amplifier equals or exceeds the performance of conventional analog audio amplifiers. Q: Can the amplifier connect to loudspeakers ? A: Yes, the amplifiers each provide a speaker output and connect directly to regular loudspeakers. © 2004 Amphony 1 Q: How does the transmitter connect to my audio equipment? A: The transmitter connects to any standard audio line output via the supplied stereo RCA audio cable or to any standard amplified speaker output via the supplied speaker cable. The transmitter can also be connected to other audio outputs, such as headphone outputs, by using an appropriate adapter. The transmitter can be adjusted to the audio level provided by the audio source via a transmitter volume control. Q: Does the transmitter connect to the amplified speaker output of my surround sound receiver? A: Yes, the transmitter can be connected directly to an amplified speaker output. Q: Is the technology used similar to Bluetooth or MP3? A: Even though both our transmitter / amplifier and Bluetooth / MP3 use digital audio, there is a fundamental difference between Bluetooth and how audio is transmitted by our transmitter. Bluetooth is only able to transmit audio data at very low data rates reliably (typically up to 200 kbps). Therefore, only compressed audio can be transmitted via Bluetooth. A commonly used technique to compress audio data is MP3. Our transmitter, however, does not compress the audio and transmits the full bit rate. As a result, the audio quality is not degraded such as with MP3. Also, the audio latency (audio delay) of MP3 compressed audio is fairly high and thus not suitable for television or surround sound applications. Since our transmitter does not compress the audio and since only a minimum of data buffering is used, the audio delay is minimal. Q: What is Forward Error Correction and why is it used by the transmitter / amplifier ? A: Occasionally, there may be some data which is corrupted during transmission. This may be the case when there is interference, such as other transmitters, electrical sparks or if you move around and the signal is temporarily lost. Forward Error Correction as it is used by the transmitter / receiver can in most cases repair the data which is received to guarantee 100% correct data reception and therefore 100% correct audio reception. This technology is in part responsible for the high robustness of the transmission. With analog audio transmitters you may have noticed ‘clicks’ or ‘pops’ during sparks which often occur when switching on appliances. Q: Can this transmitter / amplifier be used to transmit surround sound to rear speakers ? A: Yes. In this case the transmitter needs to be connected to the two rear speaker channels of your surround-sound decoder. You can either use a line-level audio output if available or an amplified speaker ouput. Both outputs can be connected directly to the transmitter. © 2004 Amphony Q: Do I need line of sight between the transmitter and amplifier ? A: Line of sight between the transmitter and amplifier is preferred but not necessary for the amplifier to operate. However, for maximum reliability, we recommend that the amplifier be placed suc...