Acoustic Energy Aegis One loudspeaker Measurements part 2
Fig.4 Acoustic Energy Aegis One, lateral response family at 50", normalized to response on tweeter axis, from back to front: differences in response 90 degrees-5 degrees off-axis, reference response, differences in response 5 degrees-90 degrees off-axis.
n the vertical plane (fig.5), the crossover topology gives rise to large suckouts between 1 and 4kHz for listeners sitting well above or below the tweeter axis. But the balance doesn't change significantly over quite a wide (±10 degree) angle, meaning that the Aegis One should be relatively unfussy regarding stand height. Fig.6 shows the speaker's spatially averaged response in my listening room. This is an impressively flat in-room balance, though the prematurely rolled-off extreme highs make their presence known. The bass also rolls off a little early compared, for example, with the PSB Alpha that I reviewed in April.
Fig.5 Acoustic Energy Aegis One, vertical response family at 50", from back to front: differences in response 45 degrees-5 degrees above axis, reference response, differences in response 5 degrees-45 degrees below axis.
Fig.6 Acoustic Energy Aegis One, spatially averaged, 1/3-octave, free-field response in JA's listening room.