Shows if speaker or speakers is portable for personal use together with notebooks, MP3 players and CD players etc...

Shows if a subwoofer comes with the PC-speakers. The subwoofer is used for playing the base or the low frequency when listening to music or watching a movie.

Shows if product comes with a remote control or not.

Each THX Certified Product is engineered to perform best in specific room environments. Room size, acoustic design and system setup are all critical factors to how movies, music and games are experienced in the home. THX Certified Multimedia Products are engineered and designed for products with approximately a 28 inch / 0.7 meter viewing distance from display - the desktop.

Shows the total power ouput in RMS for the whole system. If RMS is not founded we show the PMPO value. PMPO is a much higher value than RMS.

Shows which frequencies the system can play. The lowest is what the subwoofer can play and the highest is what the satelites can play. This value is always exaggerated by the manufacturer or retailers.

In analog and digital communications, signal-to-noise ratio, often written S/N or SNR, is a measure of signal strength relative to background noise. The ratio is usually measured in decibels (dB). If the incoming signal strength in microvolts is Vs, and the noise level, also in microvolts, is Vn, then the signal-to-noise ratio, S/N, in decibels is given by the formulaS/N = 20 log10(Vs/Vn)

A local area network that transmits over the air typically in the 2.4GHz or 5GHz unlicensed frequency band. It does not require line of sight between sender and receiver. Wireless base stations (access points) are wired to an Ethernet network and transmit a radio frequency over an area of several hundred feet through walls and other non-metal barriers. Roaming users can be handed off from one access point to another like a cellular phone system.

The major wireless LAN standard today is the IEEE 802.11, more widely known by the "Wi-Fi" logo. 802.11 a, b, g and n are different standards which limit the maximum data transfer speed. Wireless Wi-Fi adapters (Wi-Fi transceivers) are either built into most new laptops or added via a PC card slot or USB. Wireless adapters for desktop machines can be plugged into a USB port or PCI slot.