Loudspeakers

The flare of the 200mm cone, the low-profile multiroll surround and even the facetted baffle itself are all part of the 'waveguide' for the embedded 32mm tweeter. In this 'miniaturised' version of the SourcePoint 10 [HFN Apr '23] all these factors contribute to a reduction in the axial ripples seen in the bigger speaker, ensuring that the '8's on- and off-axis responses are potentially more consistent [grey vs. black traces, Graph 1]. Otherwise the response shares the flatness achieved by the '10, with errors of just ±1.6dB and ±1.9dB, respectively, from 200Hz-17kHz (discounting the +5.5dB/20kHz peak). Pair matching was a slightly wayward 1.5dB here but, again, the plastic-framed grille disrupts the response further [blue trace, Graph 1] and should be removed for keen listening. MoFi has specified a lower/realistic 87dB sensitivity for the '8 which concurs with my figures of 86.7dB/1kHz and 86.8dB/500Hz-8kHz.

The SourcePoint 8 also meets its 8ohm nominal/6.4ohm min. rating with a dip to just 7.5ohm/138Hz, and despite the high +50° phase angle from 530Hz-1.30kHz the minimum EPDR is just 3.65ohm at 241Hz. This is an 'easier' drive than the '10 though, again, the big rise in impedance to 78ohm/1.8kHz may still result in an emphasis in upper mid (vocal) response depending on the magnitude of the partnering amp's source impedance. Tube amps, in particular... THD is a modest 0.25% through the midrange (re. 90dB/1m) increasing to ~0.8% at bass freqs where the very wide 66Hz-3.4kHz/–6dB bandwidth of the 200mm woofer is met by the clean 52Hz tuning of the two rear-facing ports to deliver a fine 47Hz extension (–6dB re. 200Hz). PM