Reviewer after reviewer say these are possibly the best computer speakers you can buy. CNET used to use these so you know FX-6021s are great as CNET has an enormous budget and can use any brand and model they chose .The fx-6021 speakers have 12 micro speakers and a large subwoofer with a control unit which allows for on-off power, both base and treble adjustments , and volume control as well . There are 1 aux. port and one headphone port on each end of the control unit as well BUT the sound is the main asset because they will blow your mind . There are the usual scratches and usage marks but overall these are the pinnacle in the PC speaker kingdom.Also, all of the wires are included so just plug them in and you are ready to enjoy sound like you have never heard.There are one pair on Ebay international (Italy) for $330.00 USD delivered and there are none other anywhere whether U.S. or elsewhere and that is because people keep them because they are so good.Imagine gaming or movies or any audio source being played with premium sound .