A:Answer So the 99.99 dollar varient has just a headphone plug for line out from your computer, or analog cd player, or vinyl line out with whatever line output adapter combination you work with. It does NOT have USB. The more expensive, lighty RGB 2.0 speakers have the USB but I'm willing to bet they sound the same. They both require the power supply adapter. These aim to be high quality audio products, so please feed them properly. You want to play fully lossless audio through them, not grainy YouTube audio or your neighbors VHS camrips. Look into your streaming audio options to ensure you're playing at max fidelity because these sound GREAT.
