The Logitech Z-5500 Digital 5.1 Surround Sound Speakers are a great choice.
Center channel speakers are deducted to dialogue on a audiovisual program. They are used with surround sound systems in the home and are typically hung the center. So if you want to have the complete surround sound experience you will need one of these speakers.
If the receiver is just stereo, not surround sound, you will not be able to create a surround sound (front, centre, sub, surround) setup.
Surround Nepal Private Limited.
There are no surround modes that quickly turn off the subwoofer, center channel and surround back speakers, but leave the surround speakers (side) speakers on. You will need to go into the System Setup -> Sp 2. In 3.0p -> Speaker Setup menu to select Center Speaker 'None', Surround Speaker ('Large' or 'Small'), Surround Back Speaker 'None' and Subwoofer 'No'. If you have a subwoofer and want sound to come out of the all of the speakers when you are listening to a non-surround source such as a CD, use the 5CH/7CH Stereo DSP simulation.
computer system
Center channel speakers are used for surround sound audiovisual systems in order to provide the effect that the sound is coming right from the screen. This is done by placing the center channel speaker in the center of and behind the projection screen.
If you use a surround sound receiver that let you define the numbers of channels, set it for 2.0 or 2.1 if you have a sub. The center channel audio will be mixed into the left and right speakers.
6.1 surround has right front, center, left front, subwoofer, left surround, right surround and a rear channel. The mix is usually created from a 7.1 surround signal, combining the left and right rear signals into one rear signal. There are very few movies with a true 6.1 or 7.1 mix available for home viewing.
Auxiliary inputs to a receiver are always stereo. If you have a 5-channel analog signal (from a computer or other multi-channel device), you will need a receiver with a 5.1 analog input. This has 5 separate RCA inputs for left, right, center, sub, and the two surround speakers. An analog output from a VHS-Hi Fi VCR can be input into the stereo aux inputs of a receiver and decoded to Dolby Surround, but this format is actually only 3 discrete channels, left, right, and surround. It has no separate information for the sub or the center channel, and has a limited bandwidth on the surround channel.
The speakers must be aligned in a very specific way, with the main channel directly behind the main seating area and the side speakers at the sides of the listening area.
If the speakers are passive and you can connect a line input into the sub separately, then yes. Most receivers can be configured for only two front speakers and a sub, although you will be losing all of the surround effect and the center channel benefits.
For a 5 channel set up, I would recommend putting two speakers in the back and two speakers in the front. Then place the subwoofer anywhere in the room.