Mirage MRM-1 loudspeaker Measurements part 3

In my listening room, the Mirage's balance (fig.8) was very flat, with good bass extension apparent. But if you compare this graph with those of other speakers I have reviewed, the slight excess of top-octave energy and the laid-back mid-treble can be seen.

Fig.8 Mirage MRM-1, spatially averaged, 1/3-octave, free-field response in JA's listening room.

As expected from its crossover topology and flat baffle, the MRM-1's step response (fig.9) is perfectly conventional: both drivers are wired in positive acoustic polarity, and the tweeter's output leads the woofer's by a fraction of a millisecond. The speaker's cumulative spectral-decay plot (fig.10) is superbly clean through the upper midrange and treble, which presumably contributes to the lack of grain.---John Atkinson

Fig.9 Mirage MRM-1, on-axis step response at 50" (5ms time window, 30kHz bandwidth).

Fig.10 Mirage MRM-1, cumulative spectral-decay plot at 50" (0.15ms risetime).

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