Short answer: the GR-Research NX-Studio for a clean waterfall, the MoFi SourcePoint 10 for best-in-class directivity. The NX-Studio’s burst decay plot is ultra clean, though its sealed enclosure means bass is tight rather than deep. The SourcePoint 10’s concentric driver delivers best-in-class sound power and early-reflections directivity, but like most coincident designs it sounds notably bright on-axis thanks to a deliberate treble lift.
The case for the MoFi SourcePoint 10: A large bookshelf speaker with a 10 inch concentric driver that acts like a point source, with a huge soundstage and strong, clean dynamics. The catch: Like virtually all coincident designs, sounds notably bright pointed directly on-axis due to a deliberate treble lift (meant to compensate for the 28mm tweeter’s earlier beaming versus a typical 25mm/1” tweeter) combined with a diffraction dip/peak from the waveguide edge; needs about 15° of toe-out to sound neutral, and even then benefits from an extra 1-2dB of treble EQ.
Buy the GR-Research NX-Studio. It is rated higher for sound quality than the MoFi SourcePoint 10 and costs less, so only choose the other one for a particular feature it does better.
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Specifications Side By Side
| GR-Research NX-Studio | MoFi SourcePoint 10 | |
|---|---|---|
| Price | $3630 per pair | $3795 per pair |
| Ranked | #4 of 222 in Large Size Bookshelf Speakers | #27 of 222 in Large Size Bookshelf Speakers |
| Dimensions | 18”H x 8.5”W x 15.5”D (457.2 x 215.9 x 393.7 mm) | 22.5”H x 14.5”W x 16.6”D (571.5 x 368.3 x 421.6 mm) |
| Impedance | 8 ohms | 8 ohms nominal, 6.4 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 87dB | 88.2dB (measured, Erin’s Audio Corner) |
| Drivers | GR-Research M165NQ 6.5” paper cone, non-resonant polymer frame, copper shorting rings and aluminum phase plug sealed enclosure woofer, GR-Research Neo3 Planar Magnetic Ribbon open baffle tweeter | 10” Paper-pulp Cone woofer, 1.25-inch soft-dome tweeter |
| Weight | 20.5 lbs (9.3 kg) each | 46.3 lbs (21.0 kg) each |
| Woofer Cabinet | sealed | ported, rear |
| DIY Kit | Yes | No |
| Bass Extension (-10dB) | - | 38Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | - | 56Hz (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | - | 4.16 |
| Spinorama Preference Score with Perfect Sub | - | 6.17 |
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