Short answer: the MoFi SourcePoint 10 for better sound quality, the Ascend Acoustics Sierra-2EX V2 for the lower price. The MoFi SourcePoint 10 ranks #27 of 222 bookshelf speakers, rated 4.4/5, at $3,795. The Ascend Acoustics Sierra-2EX V2 ranks #41, rated 4.3/5, at $1,748, $2,047 cheaper.
The Ascend Acoustics Sierra-2EX V2 is the more accurate option. A ribbon tweeter bookshelf speaker with hand matched pairs, a frequency response printout for each unit, and a long seven year warranty. Its measured preference score, a predictor of how neutral it sounds, is 5.88 against 4.16 for the MoFi SourcePoint 10. Watch for: On-axis response is relatively uneven, with an average deviation of about 0.45dB, so a listener sitting dead center may notice more unevenness than with smoother AsciLab or Ascend towers.
Why pick 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 tradeoff: 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 Ascend Acoustics Sierra-2EX V2 if the price is the priority over sound quality, or the MoFi SourcePoint 10 if sound quality is the priority over the price.
Want more options? Browse the full Passive Home rankings.
A ribbon tweeter bookshelf speaker with hand matched pairs, a frequency response printout for each unit, and a long seven year warranty.
A large bookshelf speaker with a 10 inch concentric driver that acts like a point source, with a huge soundstage and strong, clean dynamics.
Prices on this page were last checked October 31, 2026 at 7:11 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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Specifications Side By Side
| Ascend Acoustics Sierra-2EX V2 | MoFi SourcePoint 10 | |
|---|---|---|
| Price | $1,748 per pair | $3795 per pair |
| Ranked | #41 of 222 in Large Size Bookshelf Speakers | #27 of 222 in Large Size Bookshelf Speakers |
| Enclosure | ported | - |
| Drivers | RAAL 10mm true ribbon tweeter, 6” SEAS Excel Curv cone woofer | 10” Paper-pulp Cone woofer, 1.25-inch soft-dome tweeter |
| Dimensions | 14.3”H x 7.5”W x 10.5”D (362 x 190 x 267 mm) | 22.5”H x 14.5”W x 16.6”D (571.5 x 368.3 x 421.6 mm) |
| Weight | 20.1 lbs (9.1 kg) each | 46.3 lbs (21.0 kg) each |
| Sensitivity | 85dB @ 2.83V/1m anechoic (manufacturer) | 88.2dB (measured, Erin’s Audio Corner) |
| Impedance | 8 ohms nominal | 8 ohms nominal, 6.4 ohms minimum (measured, Erin’s Audio Corner) |
| Power Handling | 150W continuous, 300W peak | - |
| Frequency Response | 51-27,000Hz +/-3dB (manufacturer) | - |
| Bass Extension (-6dB) | 51.3Hz (measured, spinorama.org vendor data) | - |
| Bass Extension (-3dB) | 58.6Hz (measured, spinorama.org vendor data) | 56Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 42.4Hz (measured, spinorama.org vendor data) | 38Hz (measured, Erin’s Audio Corner) |
| Warranty | 7 years parts and labor | - |
| Country | United States | - |
| Spinorama Preference Score | 5.88 | 4.16 |
| Spinorama Preference Score with Perfect Sub | 7.95 | 6.17 |
| DIY Kit | No | No |
| Woofer Cabinet | - | ported, rear |
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