Audioengine's cute little HD3 wireless speakers ($399 per pair) is their most versatile powered speakers to date! They'll work with all your apps, music, and devices via Bluetooth aptX or hardwired analog input. There's even a USB input that feeds a PCM 5102 24-bit DAC.
Audioengine's HD3 front panel headphone jack is driven by the OPA2134, so you know they took a bit of care in every step of the design. Dual analog Class A/B monolithic amplifiers produce 30 Watts peak per channel to drive a 0.75" silk dome tweeter and 2.75" Kevlar midrange/woofer. Inputs include 3.5mm stereo mini-jack, stereo RCA, USB, and Bluetooth 4.0 with aptX. Outputs include RCA variable and 3.5mm mini-jack headphone out. There's even a very convenient front panel volume control.
At only $399 per pair, it is wonderful that the wood cabinets are hand-built and come in Satin Black Paint, Cherry Wood Veneer, and Walnut Wood Veneer. They're tiny, and what these speakers miss in deep bass they make up for in sound from upper bass to highs.
Audioengine speakers err on the side of omission, which means they sound pleasant all-day-long hour-after-hour and never offensive, which you tend to hear often via those plastic-boxed small speakers you hear at big box stores. If you just need a small pair of powered speakers, Audioengine's A2+ is a great choice ($249 per pair).