ProAc Response 3.8 loudspeaker Measurements part 2
Fig.5 ProAc Response 3.8, lateral response family at 50", normalized to response on tweeter axis, from back to front: differences in response 90 degrees-5 degrees off-axis on badge edge of baffle, reference response, differences in response 5 degrees-90 degrees off-axis on inside (tweeter) edge.
Fig.6 ProAc Response 3.8, vertical response family at 50", from back to front: differences in response 15 degrees-5 degrees above tweeter axis, reference response, differences in response 5 degrees-15 degrees below tweeter axis.
In the time domain, the step response (fig.7) reveals the tweeter and woofers to be connected with the same positive acoustic polarity, while the cumulative spectral-decay or waterfall plot (fig.8) implies a clean, grain-free presentation.
Fig.7 ProAc Response 3.8, step response on tweeter axis at 50" (5ms time window, 30kHz bandwidth).
Fig.8 ProAc Response 3.8, cumulative spectral-decay plot at 50" (0.15ms risetime).
Other than its bass tuning and horizontal mid-treble dispersion, which might make room optimization a little trickier than usual, the Response 3.8 is a well-engineered design with, as LG has pointed out, an impressive pedigree.—John Atkinson