Short answer: the MoFi SourcePoint 8 ranks #17 of 84 bookshelf speakers by sound quality at $2200; the KEF R3 ranks #15 at $2200. Close enough in price that the sound-quality gap is the deciding factor.
What the MoFi SourcePoint 8 offers: 8” twin-drive concentric driver paired with a 1.25” soft dome tweeter, in a diffraction-reducing baffle design; rated 47Hz-30kHz. Watch for: Like other coincident designs, produces diffraction dips around 4kHz and 7kHz when pointed directly on-axis; needs about 10-15° of toe-out to smooth those out.
What the KEF R3 offers: True three-way stand-mount with a 6.5-inch woofer below KEF’s 5-inch Uni-Q midrange/1-inch tweeter. Watch for: The low-frequency alignment rolls gradually rather than delivering high-output sub-bass; KEF specifies 58Hz +/-3dB and Erin’s high-level data supports using an 80Hz subwoofer crossover.
Buy the KEF R3. It ranks higher for sound quality than the MoFi SourcePoint 8 at the same price, so there is no real case for the other one.
Specifications Side By Side
| MoFi SourcePoint 8 | KEF R3 | |
|---|---|---|
| Price | $2200 | $2,200/pair |
| Ranked | #17 of 84 in Large Size Bookshelf Speakers | #15 of 84 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-3dB) | 52Hz (measured, Erin’s Audio Corner) | Approximately 58Hz (manufacturer specified; consistent with Erin’s measured roll-off) |
| Dimensions | 18"H x 11.4"W x 13.2"D (457.2 x 289.6 x 335.3 mm) | 16.6"H x 7.9"W x 13.2"D |
| Impedance | 8 ohms nominal (8 ohms minimum above 80Hz, measured, Erin’s Audio Corner) | 8 ohms nominal; suitable for Erin’s 4/8-ohm-rated amplifier |
| Sensitivity | 86.3dB (measured, Erin’s Audio Corner) | Approximately 86-87dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Drivers | 8" woofer, 1.25-inch soft-dome tweeter | 1" tweeter coaxial with 5" midrange; 6.5" woofer |
| Weight | 28 lbs / 12.7 kg each | - |
| Woofer Cabinet | ported, rear | ported, rear Flexible Port |
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The Two Speakers In Full
MoFi SourcePoint 8: $2200 Crutchfield
Pros: 8” twin-drive concentric driver paired with a 1.25” soft dome tweeter, in a diffraction-reducing baffle design; rated 47Hz-30kHz. Notably more neutral and true-to-source than its sibling SourcePoint 10, which the reviewer found a bit too bright in the treble by comparison - measured about 4-5dB less high-frequency output. Excellent imaging: passed multiple stereo-panning and depth tests, including smooth continuous left-to-right pans without wobble and correct front-to-back layering of vocals versus percussion. Wide horizontal dispersion of about ±60°, broader than the reviewer expected from a coaxial design, and forgiving enough in placement that about 10° of toe-out variance and moving above or below the tweeter axis both still sound good. Excellent dynamic range and compression linearity - about 26dB of headroom up to 102dB/1m equivalent, with issues only appearing below about 60Hz. 8-ohm nominal impedance made it easy to drive on everything from a budget Denon AVR to a high-end Macintosh amplifier. No significant evidence of woofer-cone modulation distortion affecting the tweeter, even at 96dB/1m.
Cons: Like other coincident designs, produces diffraction dips around 4kHz and 7kHz when pointed directly on-axis; needs about 10-15° of toe-out to smooth those out. The rear-ported cabinet (two ports) means it can’t be placed too close to a wall without the bass becoming overblown - the reviewer settled on about 2 feet of clearance. F3 of 52Hz and F10 of 43Hz mean genuine deep bass tops out in the mid-40s Hz in-room - a subwoofer is still needed for true low-end extension. Harmonic distortion crosses the reviewer’s 3% threshold at 96dB (though it’s second-order and less audibly significant), and multitone distortion becomes noticeably more audible at that same output level. Vertical response doesn’t perfectly mirror horizontal, since the cabinet is a rectangle rather than a perfect square around the driver.
Full MoFi SourcePoint 8 review and specifications →
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 52Hz (measured, Erin's Audio Corner) |
| Dimensions | 18"H x 11.4"W x 13.2"D (457.2 x 289.6 x 335.3 mm) |
| Drivers | 8" woofer, 1.25-inch soft-dome tweeter |
| Impedance | 8 ohms nominal (8 ohms minimum above 80Hz, measured, Erin's Audio Corner) |
| Sensitivity | 86.3dB (measured, Erin's Audio Corner) |
| Weight | 28 lbs / 12.7 kg each |
| Woofer Cabinet | ported, rear |
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- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Why Do People Love the MoFi SourcePoint 8?
- Erin’s Audio Corner Website MoFi SourcePoint 8
- Erin’s Audio Corner: Upgrade Your Sound with These 6 Surprisingly Affordable Speakers!
- Erin’s Audio Corner: My Personal Favorite Speakers Under $2500
- Erin’s Audio Corner: My Top Picks of 2023: Must-Haves Under $3000
- GR-Research: Danny Tackles Andrews Jones: The Source Point 8! Spoiler Alert (It’s Really Good)
- Reddit Search for MoFi SourcePoint 8 Review
- Head-to-Head Comparisons
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- MoFi SourcePoint 8 vs KEF Q Concerto Meta
- MoFi SourcePoint 8 vs KEF R3 Meta
- MoFi SourcePoint 8 vs Wharfedale Linton 85
- See all 16 comparisons
KEF R3: $2,200/pair Amazon
Pros: True three-way stand-mount with a 6.5-inch woofer below KEF’s 5-inch Uni-Q midrange/1-inch tweeter. Erin measured approximately 86-87dB/2.83V/1m sensitivity, exceptionally low sub-1% distortion at 86dB and orderly directivity in both planes. The coaxial geometry maintains image stability across seats, while Flexible Port Technology avoids the strong midrange port resonance common to rear-vented competitors. A 110W Parasound drove it successfully in Erin’s listening.
Cons: The low-frequency alignment rolls gradually rather than delivering high-output sub-bass; KEF specifies 58Hz +/-3dB and Erin’s high-level data supports using an 80Hz subwoofer crossover. Narrow high-frequency features and natural Uni-Q narrowing toward the top octave make toe angle audible, although off-axis tracking remains smooth. Sensitivity is moderate, the cabinet weighs almost 30 lb, and this original R3 lacks the Meta successor’s MAT absorber.
Full KEF R3 review and specifications →
| Bass Extension (-3dB) | Approximately 58Hz (manufacturer specified; consistent with Erin's measured roll-off) |
|---|---|
| Dimensions | 16.6"H x 7.9"W x 13.2"D |
| Drivers | 1" tweeter coaxial with 5" midrange; 6.5" woofer |
| Impedance | 8 ohms nominal; suitable for Erin's 4/8-ohm-rated amplifier |
| Sensitivity | Approximately 86-87dB/2.83V/1m (measured, Erin's Audio Corner) |
| Woofer Cabinet | ported, rear Flexible Port |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons