Short answer: the AsciLab C6B. It ranks #6 of 222 bookshelf speakers by sound quality, rated 4.7/5, at $1,145; the MoFi SourcePoint 8 ranks #17, rated 4.5/5, and costs $2,594, so there is little reason to consider the other one.
Why pick the MoFi SourcePoint 8: A bookshelf speaker with an 8 inch concentric driver, neutral sound, excellent imaging, and wide dispersion that forgives placement. The tradeoff: 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 AsciLab C6B is the more accurate pick. Bookshelf speakers with very accurate sound and an unusually wide, stable soundstage, for any seating position. Its measured preference score, a predictor of how neutral it sounds, is 6.33 against 5.15 for the MoFi SourcePoint 8. The catch: Bass rolls off around 50Hz in-room (F3 54Hz, F10 35Hz), so a subwoofer is needed for real extension below that.
Buy the AsciLab C6B. It is rated higher for sound quality than the MoFi SourcePoint 8 and costs less, which makes it the one to get unless you need something the other one does better.
Still deciding? The full Passive Home rankings cover every ranked option.
Measured Differences
- Bass depth: the AsciLab C6B reaches 35 Hz (10 dB down) against 43 Hz for the MoFi SourcePoint 8, about half an octave deeper. You hear more of the lowest bass notes and kick drums.
- Tonal accuracy above the bass: with a subwoofer taking the low end, the AsciLab C6B scores 8.3 against 7.3 for the MoFi SourcePoint 8 on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
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Specifications Side By Side
| MoFi SourcePoint 8 | AsciLab C6B | |
|---|---|---|
| Price | $2594 per pair | $1145 per pair |
| Ranked | #17 of 222 in Large Size Bookshelf Speakers | #6 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | 35Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 52Hz (measured, Erin’s Audio Corner) | 54Hz (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) | 15.7”H x 8”W x 10.4”D (398.8 x 203.2 x 264.2 mm) |
| Impedance | 8 ohms nominal (8 ohms minimum above 80Hz, measured, Erin’s Audio Corner) | 4 ohms nominal, 2.6 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 86.3dB (measured, Erin’s Audio Corner) | 85.6dB (measured, Erin’s Audio Corner) |
| Drivers | 8” woofer, 1.25-inch soft-dome tweeter | 6” Aluminium Ceramic Cone with cast Aluminium Chassis woofer, 1” Aluminium Ceramic Dome tweeter |
| Weight | 28 lbs (12.7 kg) each | 18.5 lbs (8.4 kg) each |
| Woofer Cabinet | ported, rear | passive radiator |
| Spinorama Preference Score | 5.15 | 6.33 |
| Spinorama Preference Score with Perfect Sub | 7.28 | 8.28 |
| DIY Kit | No | No |
Where the Ratings Come From
- MoFi SourcePoint 8: Spinorama.org measurements and reviews by Erin’s Audio Corner and GR-Research.
- AsciLab C6B: Spinorama.org measurements and reviews by Erin’s Audio Corner.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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