Compact, but with a sound of a much larger model
While it shares the 25 mm tweeter dome with its siblings, it claims the compact, but powerful, 125 mm bass-midrange driver for itself. This delves down to a frequency of 38 Hz, which should be more than ample in many cases. At the other end of the frequency band it reaches 40,000 Hz. As a result, the Reference 2A can definitely be used for high-res material.
The amplifier that is integrated in the active speaker delivers 2 x 35 watts of continuous power (RMS) or 2 x 75 watts of peak power. The elaborately equipped crossover sorts the music signal at 3,500 Hz. Since both amplifiers are located in one speaker, you only need one socket for the power supply; the passive speaker is simply connected to the active unit using the supplied cable.