Stand Loudspeaker Reviews

In the time domain, the Acoustic Energy's step response (fig.7) reveals that the tweeter and woofer are connected with the same positive acoustic polarity. The associated cumulative spectral-decay or waterfall plot (fig.8) is generally free from resonance-induced delayed energy ridges, but a distinct step can be seen at the crossover frequency, which I imagine correlates both with the slight nasality I occasionally noted and the hardness on some high-treble piano notes.

Fig.7 Acoustic Energy Aegis One, on-axis step response at 50" (5ms time window, 30kHz bandwidth).

Fig.8 Acoustic Energy Aegis One, cumulative spectral-decay plot at 50" (0.15ms risetime).

All in all, this is pretty good measured performance for such an inexpensive speaker.—John Atkinson