“In tonal balance, the HD6 offers a forgiving, ear-coddling midrange—a warmer, slightly darker balance that was effective at conveying big sound from a small box. Bass response was largely very good, if a little overly enthusiastic in the upper midbass. This added oomph in the 80–150Hz range is not uncommon among mini-monitors. Like a loudspeaker equipped with a much larger woofer, the HD6 creates an illusion of bottom-octave extension. Although not perfectly flat in frequency response, its bass has been tailored pleasingly, with commendable control and usable extension into the 50–60Hz range—certainly enough to provide excitement while listening to large-scale music, a feature I noted immediately during the final moments of Vaughan-Williams’Antartica [Naxos] when the orchestra, playing at full tilt, is suddenly interrupted by pipe organ, emerging like a leviathan from the musical depths. That’s a lot of information, and the HD6 traversed this territory with confidence and clarity.” —— theabsolutesound.com