Logitech Z-5450 Digital 5.1 Speaker System 970181-0914 产品宣传页

This design innovation provides people with unmatched 
flexibility in how they lay out their system, whether it’s for a PC 
gaming setup in the office or a home-theater system in the 
living room. The rear speakers are designed to work in a range 
of up to 8.5 meters (28 feet). Logitech testing showed that in 
some circumstances, they can connect at distances as great as 
100 meters – a much greater range than would ever be 
needed for a home environment. With this robust wireless 
technology comes the freedom to place Logitech’s rear 
satellites virtually anywhere in a room — the only thing needed 
is a power outlet. 

 
Overcoming the Wireless Performance Challenge 

When it comes to 5.1 digital surround sound, performance 
rules. The potential benefit of wireless rear speakers is insignificant if people experience audio dropouts 
or the speaker performance suffers in any way. The 315-watt, THX-certified Logitech Z-5450 Digital 
speaker system achieves a fast and reliable wireless connection by using advanced 2.4 GHz digital 
wireless technology. This wireless technology results in three characteristics essential to high-
performance audio: 

•  Very low latency 
•  Minimal interference  
•  Virtually no lost signals 

 
Low Latency 
In the case of wireless speakers, latency represents the delay between when a wireless signal is sent and 
when the speakers reproduce the sound. Standards-based technologies such as Wi-Fi do not have the 
low latency necessary to maintain a high-quality, low-latency real-time audio signal. Logitech’s wireless 
speakers deliver a latency of less than 20 milliseconds, or .02 seconds — a duration of time that is 
imperceptible to the human ear.  
 
Minimal Interference 
Logitech’s proprietary 2.4 GHz digital wireless technology provides the speaker system the ability to jump 
between different channels in the wireless band if there is interference. In Logitech’s implementation, the 
Z-5450 speakers are able to intelligently monitor 38 different channels within the 2.4 GHz band, and 
constantly maintain a list of clean channels. Both the transmitter and the receiver automatically hop to 
one of the clean channels to maintain a clear connection. This automatic frequency hopping technology 
ensures that the system is always transmitting on the channels with the least amount of interference. 
 
Virtually No Lost Signals 
Regardless of how robust a wireless system is, there is always a chance of 
interference or of a signal being blocked. Logitech addresses this possibility with 
intelligent redundant transmissions. When needed, the system can send a 
redundant audio signal on a new, clearer channel — all within 20 milliseconds. 
The Logitech Digital SoundTouch™ Control Center (shown at right) transmits t
signals to the independent rear satellites. The rear satellites then decode thos
signals into digital audio and produce the sound. 

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