Short answer: the Aalto Speakers Aalto 3 Passive. It ranks #54 of 222 bookshelf speakers by sound quality (rated 4.2/5); the Ascend Acoustics CBM-170 SE2 ranks #114 (rated 3.8/5).
The case for the Ascend Acoustics CBM-170 SE2: On-axis response is impressively flat from about 100Hz to 2kHz, staying within roughly ±1dB, with a clean, gradual bass rolloff below that. The catch: A narrow dip in the on-axis and listening-window response appears in the 3-5kHz range (down to about -2.7dB), mirrored by a matching dip in the directivity index at the same frequencies: likely a brief widening of dispersion right at the tweeter/woofer crossover.
The Aalto Speakers Aalto 3 Passive is the more accurate, deeper-bass choice. The passive version of the same cabinet as Aalto’s Active Pro model, sharing its 26mm aluminum tweeter and 6.5” bass-midrange driver but without the built-in amp module, for buyers who already have their own amplification. Its measured preference score, a predictor of how neutral it sounds, is 6.82 against 6.30 for the Ascend Acoustics CBM-170 SE2. Its bass reaches about 56.6Hz before falling 3dB, against 70Hz for the Ascend Acoustics CBM-170 SE2. The tradeoff: Requires an external amplifier (50-250W recommended) that the Active Pro doesn’t, and shares the same review gap: no independent editorial coverage found, only manufacturer-supplied specs, with factory-direct-only sales from Finland.
Buy the Aalto Speakers Aalto 3 Passive. It is rated higher for sound quality than the Ascend Acoustics CBM-170 SE2.
Looking for alternatives? See the complete Passive Home rankings.
On-axis response is impressively flat from about 100Hz to 2kHz, staying within roughly ±1dB, with a clean, gradual bass rolloff below that.
Ascend Acoustics $468 eBay
The passive version of the same cabinet as Aalto’s Active Pro model, sharing its 26mm aluminum tweeter and 6.5” bass-midrange driver but without the built-in amp module, for buyers who already have their own amplification.
Aalto Speakers eBayPrices on this page were last checked October 17, 2026 at 6:04 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| Ascend Acoustics CBM-170 SE2 | Aalto Speakers Aalto 3 Passive | |
|---|---|---|
| Price | $468 per pair | €3,490 per pair |
| Ranked | #114 of 222 in Large Size Bookshelf Speakers | #54 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | 70Hz (measured, manufacturer spinorama data) | 56.6Hz (measured, manufacturer spinorama data) |
| Bass Extension (-10dB) | 50Hz (measured, manufacturer spinorama data) | 32.1Hz (derived, log-interpolated between manufacturer spinorama -9dB/-12dB points) |
| Sensitivity | 86.8dB (2.83V/1m, measured, manufacturer spinorama data; 87dB manufacturer specified) | 83.5dB @ 2.83V/1m |
| Drivers | 27mm custom SEAS soft dome tweeter, 6.5” proprietary composite polygel cone woofer | 26mm aluminum dome tweeter, 6.5” long-throw bass-midrange, 8” passive radiator |
| Dimensions | 12H x 9W x 9.5D in | 9.4”W x 15.7”H x 9.8”D (240 x 400 x 250 mm) |
| Weight | 15 lbs (6.8 kg) each | 20.7 lbs (9.4 kg) each |
| Impedance | 8 ohms | 4 ohms nominal (min 4 ohms @ 18kHz) |
| Power Handling | 200W continuous, 400W peak | 50-250W RMS recommended amplifier power |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 6.30 | 6.82 |
| Spinorama Preference Score with Perfect Sub | 8.66 | 8.45 |
| DIY Kit | No | No |
| Enclosure | - | 2-way, passive-radiator loaded, MDF |
| Country | - | Finland |
Frequency Response Compared
Both speakers’ spinorama measurements, overlaid. A flatter line is more neutral: peaks sound forward or harsh, dips sound recessed. Each curve is shifted so its average from 300 Hz to 3 kHz sits at 0 dB, so loudness differences between the two are removed and only the shape is compared.
Measurement data: Ascend Acoustics CBM-170 SE2 (measured by the manufacturer) and Aalto Speakers Aalto 3 Passive (measured by the manufacturer), via spinorama.org.
Related Speaker Comparisons
How Aalto Speakers Aalto 3 Passive compares with other leading options: