Anything with wires is so last millennium! Thatâs why it was a relief to catch the new Yamaha NX-B02 Bluetooth speaker. Based on the NX-A01 speaker cube, the new and improved Yamaha NX-A02 is a completely wireless speaker with a stereo pair of 1.75-inch titanium cone drivers and a powerful bass port. Standard 3.5mm line-input apart, the Yamaha NX-B02 speaker also includes Bluetooth 2.0+EDR/A2DP. Power options offer a choice between an adapter and four AA batteries, but since these batteries will only last you around four hours of continuous play, you might wanna go for the rechargeable kinds. With cool color options including glossy cherry red, classic black or standard white, dishing out $140 for this awesome speaker is not such a bad bargain.