The Ascend Acoustics Sierra Duo V2 Ribbon ranks #57 out of 158 total Large Size Bookshelf Speakers for sound quality. See all Passive Home rankings for every top pick.
Brand: Ascend Acoustics
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#57 Ascend Acoustics Sierra Duo V2 Ribbon: $1,688 per pair Ascend Acoustics eBay
Older model: the Ascend Sierra Luna Duo (rated 1.2/5).
Pros: High-quality manufacturer NFS data gives the RAAL version a low 2.09 sound-power directivity-index standard deviation, the most consistent dispersion of the two Duo V2 variants. Its preference score improves from 4.53 to 7.15 with a subwoofer, while the compact bamboo cabinet, dual front slots, and vertical or horizontal mounting options are unusually flexible. Measured bass extension of 79.1Hz (-3dB).
Cons: Bass measures 79.1Hz at -3dB, 64.5Hz at -6dB, and 43.9Hz at -12dB, and the 0.645dB on-axis average absolute deviation trails the Titan version’s 0.585dB. The 0.410 normalized listening-window deviation and narrow horizontal dispersion when the MTM cabinet is placed horizontally make vertical orientation preferable; a subwoofer is strongly recommended.
How it compares: Just above it: Power Sound Audio MT-110-M - $338 cheaper, 6.5Hz higher bass extension (-3dB). Just below it: ELAC Uni-Fi Reference UBR62 - $389 cheaper, 3Hz lower bass extension (-3dB).
| Bass Extension (-10dB) | approximately 50Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 79.1Hz (measured, spinorama.org) |
| DIY Kit | No |
| Dimensions | 16.25 x 5.75 x 6 in each |
| Drivers | Two 4.5-inch glass-fiber woofers; custom RAAL true ribbon tweeter |
| Impedance | 8 ohms nominal |
| Sensitivity | 86dB at 2.83V/1m anechoic |
| Spinorama Preference Score | 4.53 |
| Spinorama Preference Score with Perfect Sub | 7.15 |
| Weight | 12.3 lbs (5.6 kg) each |
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