Short answer: the GR-Research NX-Treme, if you can house it. It ranks #1 of 71 and it can radiate in all directions with no internal reflections for a huge soundstage. But it is very tall and needs a GR-Research open baffle subwoofer on each side, while the MoFi SourcePoint 888 is a three-way vented design crossed at about 130Hz for $5495 against $9662.
On the GR-Research NX-Treme side: Amazing in terms of soundstage and imaging as the speaker can radiate in all directions and not have internal reflections due to there not. Set against that: Very tall and will require GR-Research open baffle subwoofers one on each side.
The case for the MoFi SourcePoint 888: Three-way vented design: an 8” coaxial mid-range/1.25” dome tweeter driver plus two additional 8” woofers crossed at about 130Hz. The catch: A significant investment, best ordered from a dealer with a good return policy.
Buy the GR-Research NX-Treme when sound quality outweighs the price for you, and the MoFi SourcePoint 888 when the price outweighs sound quality instead.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| GR-Research NX-Treme | MoFi SourcePoint 888 | |
|---|---|---|
| Price | $9662 per pair for the kit with subs (assembly required) | $5495 per pair |
| Ranked | #1 of 71 in Large Size Floorstanding Speakers | #4 of 71 in Large Size Floorstanding Speakers |
| Bass Extension (-3dB) | <20Hz (With GR-Research open baffle subwoofers) | 34Hz (measured, Erin's Audio Corner) |
| Dimensions | 85"H x 17"W x 20"D (2159 x 431.8 x 508 mm) (plus a subwoofer on each side) | 41.2"H x 12.6"W x 16.1"D (1046.5 x 320 x 408.9 mm) |
| Impedance | 8 ohms | 6 ohms nominal, 5 ohms minimum (measured, Erin's Audio Corner) |
| Drivers | Eight 6.5" M165 open baffle woofer, Two 6.5" M165NQ open baffle midrange, GR Neo 3 Magnetic planar open baffle tweeter; Three 12-inch Rythmik Audio servo-controlled subwoofers; Three 12-inch Rythmik Audio servo-controlled subwoofers; Three 12-inch Rythmik Audio servo-controlled subwoofers; Three 12-inch Rythmik Audio servo-controlled subwoofers | Dual 8" paper cone woofers, 8" Paper Cone midrange, 1.25" wide roll soft dome tweeter |
| Sensitivity | 94.5dB | 85.6dB (measured, Erin's Audio Corner) |
| Woofer Cabinet | open baffle | ported, rear |
| Weight | (35.3 lbs (16 kg)) | 94.8 lbs (43 kg) each |
| DIY Kit | Yes | No |
| Bass Extension (-10dB) | - | 26Hz (measured, Erin's Audio Corner) |
| Spinorama Preference Score | - | 6.09 |
| Spinorama Preference Score with Perfect Sub | - | 7.21 |
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Prices on this page were last checked September 23, 2026 at 11:24 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
GR-Research NX-Treme: $9662 per pair for the kit with subs (assembly required) Gr-research eBay
Pros: Amazing in terms of soundstage and imaging as the speaker can radiate in all directions and not have internal reflections due to there not being a speaker box. One of the highest sensitivity speakers around. Open baffle mids, highs and bass (using GR-Research Open baffle subs). If you have not heard open baffle bass, you must hear it in person, there’s no going back. Amazing in terms of imaging as the speaker can radiate in all directions and not have internal reflections due to there not being a speaker box. Can easily be driven by tube amps due to the mild impedance. Measured bass extension of <20Hz (-3dB).
Cons: Very tall and will require GR-Research open baffle subwoofers one on each side
Full GR-Research NX-Treme review and specifications →
| Bass Extension (-3dB) | <20Hz (With GR-Research open baffle subwoofers) |
|---|---|
| DIY Kit | Yes |
| Dimensions | 85"H x 17"W x 20"D (2159 x 431.8 x 508 mm) (plus a subwoofer on each side) |
| Drivers | Eight 6.5" M165 open baffle woofer, Two 6.5" M165NQ open baffle midrange, GR Neo 3 Magnetic planar open baffle tweeter; Three 12-inch Rythmik Audio servo-controlled subwoofers; Three 12-inch Rythmik Audio servo-controlled subwoofers; Three 12-inch Rythmik Audio servo-controlled subwoofers; Three 12-inch Rythmik Audio servo-controlled subwoofers |
| Impedance | 8 ohms |
| Sensitivity | 94.5dB |
| Weight | (35.3 lbs (16 kg)) |
| Woofer Cabinet | open baffle |
- Links
- Reviews, Comparisons and Sound Samples
- No independent measurement review is linked for this model; it is ranked from hands-on listening and comparison against similarly priced speakers.
- Head-to-Head Comparisons
MoFi SourcePoint 888: $5495 per pair Crutchfield eBay
Pros: Three-way vented design: an 8” coaxial mid-range/1.25” dome tweeter driver plus two additional 8” woofers crossed at about 130Hz, giving genuinely full-range output (F3 34Hz, F10 26Hz) other than the deepest subsonic content. Ranked by the reviewer among his personal top three speakers out of roughly 200 tested, alongside the KEF Blade 2 Meta and Dutch & Dutch 8C, despite costing a small fraction of either. Excellent compression/dynamic-range linearity, holding its own against much pricier speakers like the March Audio Sointuva AWG, KEF Reference 1 Meta, and KEF Blade 2 Meta. On-axis (0°) and 30°-off-axis estimated in-room responses track within about 1-1.5dB of each other above 500Hz, so tonal balance barely changes with placement or listening angle - excellent for multi-seat home theater or entertaining. Wide horizontal dispersion of about ±60°. Distortion stays low: under 1% at 86dB, and under 1% above 200Hz even at 96dB, with multitone distortion mostly under 1% as well. Not a difficult amplifier load (5-ohm minimum impedance, 4.2-ohm minimum EPDR). Checks the three boxes the reviewer considers essential for a home theater speaker: low compression, low distortion, and excellent directivity. Measured bass extension of 34Hz (-3dB), with a measured sensitivity of 85.6dB.
Cons: A significant investment, best ordered from a dealer with a good return policy. Large and heavy floorstander (about 96 lbs, 42” tall) requiring real floor space and rear clearance. Positioning is fairly specific: needs about 2 feet from the rear wall - closer causes boominess in the 40-50Hz region, farther loses bass extension. Vertical dispersion (about ±50°) is narrower than horizontal (about ±60°), since the two 8” woofers are spaced vertically apart on a tower cabinet, causing some vertical mismatch at lower frequencies. A small on-axis dip around 500Hz and a deliberately lower tweeter level (about 0.5dB below the midrange) are intentional design choices for smoother in-room response, but mean the raw on-axis measurement isn’t perfectly flat. A mild diffraction-related dip appears around 3kHz in directivity measurements. Toeing the speaker out more than about 10° starts to noticeably reduce top-end energy.
Full MoFi SourcePoint 888 review and specifications →
| Bass Extension (-10dB) | 26Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 34Hz (measured, Erin's Audio Corner) |
| DIY Kit | No |
| Dimensions | 41.2"H x 12.6"W x 16.1"D (1046.5 x 320 x 408.9 mm) |
| Drivers | Dual 8" paper cone woofers, 8" Paper Cone midrange, 1.25" wide roll soft dome tweeter |
| Impedance | 6 ohms nominal, 5 ohms minimum (measured, Erin's Audio Corner) |
| Sensitivity | 85.6dB (measured, Erin's Audio Corner) |
| Spinorama Preference Score | 6.09 |
| Spinorama Preference Score with Perfect Sub | 7.21 |
| Weight | 94.8 lbs (43 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- MoFi SourcePoint 888 vs MoFi SourcePoint V10 Master Edition
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- MoFi SourcePoint 888 vs KEF Blade Two Meta
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- MoFi SourcePoint 888 vs JBL HDI-3800
- MoFi SourcePoint 888 vs Revel F328Be
- MoFi SourcePoint 888 vs KEF R5 Meta
- MoFi SourcePoint 888 vs KEF R5
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