Short answer: the Wharfedale Aura 2 if sound quality matters most, the Ascend Acoustics CBM-170 SE2 if price matters most. The Wharfedale Aura 2 ranks #13 of 216 bookshelf speakers, rated 4.6/5, at $2,799. The Ascend Acoustics CBM-170 SE2 ranks #112, rated 3.8/5, at $468, $2,331 cheaper.
What the Ascend Acoustics CBM-170 SE2 does well: On-axis response is impressively flat from about 100Hz to 2kHz, staying within roughly ±1dB, with a clean, gradual bass rolloff below that. Watch for: 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 Wharfedale Aura 2 is the better-sounding, deeper-bass choice. Three-way “mini tower” design with a 27x90mm AMT tweeter, 4” mid-range, and 6.5” midwoofer, using an unusual bottom-firing port. Its bass reaches about 56Hz before falling 3dB, against 70Hz for the Ascend Acoustics CBM-170 SE2. The tradeoff: A breakup/peak around 13kHz can sound sharp or shrill depending on the track, the main tonal flaw noted.
Buy the Ascend Acoustics CBM-170 SE2 if the price is the priority over sound quality, or the Wharfedale Aura 2 if sound quality is the priority over the price.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Ascend Acoustics CBM-170 SE2 | Wharfedale Aura 2 | |
|---|---|---|
| Price | $468 per pair | $2799 per pair |
| Ranked | #112 of 216 in Large Size Bookshelf Speakers | #13 of 216 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | 70Hz (measured, manufacturer spinorama data) | 56Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 50Hz (measured, manufacturer spinorama data) | 30Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 86.8dB (2.83V/1m, measured, manufacturer spinorama data; 87dB manufacturer specified) | 87dB (measured, Erin’s Audio Corner) |
| Drivers | 27mm custom SEAS soft dome tweeter, 6.5” proprietary composite polygel cone woofer | 6.5” Black Glass Fibre Matrix Cone woofer, 4” Black Glass Fibre Matrix Cone midrange, 27x90mm AMT tweeter |
| Dimensions | 12H x 9W x 9.5D in | 22.1”H x 11.3”W x 15.3”D (561.3 x 287 x 388.6 mm) |
| Weight | 15 lbs (6.8 kg) each | 45 lbs (20.4 kg) each |
| Impedance | 8 ohms | 6 ohms nominal (3.1 ohms minimum above 80Hz, measured, Erin’s Audio Corner) |
| Power Handling | 200W continuous, 400W peak | - |
| Woofer Cabinet | ported, rear | ported, rear |
| Spinorama Preference Score | 6.30 | 6.03 |
| Spinorama Preference Score with Perfect Sub | 8.66 | 7.65 |
| DIY Kit | No | No |
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. The two were measured by different sources, so small differences, especially in the bass, can come from the measurement setup rather than the speakers.
Measurement data: Ascend Acoustics CBM-170 SE2 (measured by the manufacturer) and Wharfedale Aura 2 (measured by Erin’s Audio Corner), via spinorama.org.
Related Speaker Comparisons
How Wharfedale Aura 2 compares with other leading options:
- Wharfedale Aura 2 vs Perlisten S4b
- KEF Reference 1 Meta vs Wharfedale Aura 2
- Wharfedale Aura 2 vs GR-Research NX-Studio
- Wharfedale Aura 2 vs March Audio Sointuva AWG
- AsciLab C6B vs Wharfedale Aura 2
Prices on this page were last checked October 12, 2026 at 4:13 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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The Two Speakers In Full
Ascend Acoustics CBM-170 SE2: $468 per pair Ascend Acoustics $468 eBay
Older model: the Ascend Acoustics CBM-170 SE (ranked lower, rated 2.1/5). See every Ascend CBM, HTM and CMT generation.
Same family: the Ascend Acoustics HTM-200SE2 (larger bookshelf, rated 4.3/5) and the Ascend Acoustics CMT-340 SE2 (larger bookshelf, ranked higher, rated 4.4/5).
Pros: On-axis response is impressively flat from about 100Hz to 2kHz, staying within roughly ±1dB, with a clean, gradual bass rolloff below that. The directivity index rises smoothly and predictably through the crossover region, and the estimated in-room response shows a smooth, consistent downward tilt from 100Hz to 10kHz with no major discontinuities: close to the ideal in-room target shape. Measured sensitivity of 86.8dB nearly matches Ascend’s 87dB spec. The manufacturer’s own preference-score modeling comes out to 6.30 unequalized (rising to 8.66 with an ideal subwoofer, or 6.79/8.86 with EQ applied): a strong result for a compact 2-way, and a clear step up from the original Ascend Acoustics CBM-170 SE this replaces. Measured sensitivity of 86.8dB.
Cons: 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. High-frequency directivity narrows substantially above 10kHz, typical for a small dome tweeter, so the top octave will sound more reserved off-axis than on-axis. Bass rolls off as expected for a compact 2-way monitor: -3dB around 70Hz and -10dB around 50Hz, so a subwoofer is needed for full-range use. This data comes from the manufacturer’s own Klippel measurements rather than an independent third-party review, so there’s no outside verification of channel matching, distortion, or unit-to-unit consistency.
Full Ascend Acoustics CBM-170 SE2 review and specifications →
| Released | Jul 2026 (3 months ago) |
|---|---|
| Bass Extension (-10dB) | 50Hz (measured, manufacturer spinorama data) |
| Bass Extension (-3dB) | 70Hz (measured, manufacturer spinorama data) |
| DIY Kit | No |
| Dimensions | 12H x 9W x 9.5D in |
| Drivers | 27mm custom SEAS soft dome tweeter, 6.5” proprietary composite polygel cone woofer |
| Impedance | 8 ohms |
| Power Handling | 200W continuous, 400W peak |
| Sensitivity | 86.8dB (2.83V/1m, measured, manufacturer spinorama data; 87dB manufacturer specified) |
| Spinorama Preference Score | 6.30 |
| Spinorama Preference Score with Perfect Sub | 8.66 |
| Weight | 15 lbs (6.8 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Wharfedale Aura 2: $2799 per pair Crutchfield $2799 eBay
Same family: the Wharfedale Aura 1 (smaller bookshelf, estimated 4.2/5), the Wharfedale Aura 3 (smaller floorstanding, estimated 4.6/5), the Wharfedale Aura 4 (larger floorstanding, estimated 4.7/5), the Wharfedale Aura CS (smaller center, estimated 3.6/5) and the Wharfedale Aura C (larger center, estimated 4.1/5).
Pros: Three-way “mini tower” design with a 27x90mm AMT tweeter, 4” mid-range, and 6.5” midwoofer, using an unusual bottom-firing port. Nearly “ruler flat” on-axis linearity (within about 1.5dB for most of the range) apart from one specific breakup point. Exceptional output capability with very low distortion even at high volume: the reviewer reached about 100dB average at 10 feet with no audible strain, outperforming rivals like the KEF LS50 Meta in multitone distortion above 1kHz. Wide horizontal radiation of about ±70° combined with excellent imaging and pair matching: passed demanding stereo-separation test tracks with precise instrument placement. Bass reaches a genuine 40Hz in most rooms, potentially eliminating the need for a subwoofer for material that doesn’t demand extreme sub-bass. About 20dB of usable dynamic range with no compression issues at 96dB/1m. Considered by the reviewer one of the best speakers he’s tested, potentially challenging his personal all-time top five. Measured bass extension of 56Hz (-3dB), with a measured sensitivity of 87dB.
Cons: A breakup/peak around 13kHz can sound sharp or shrill depending on the track, the main tonal flaw noted. Minor midbase-to-midrange balance discrepancy (about 1dB), most noticeable if the speaker sits more than about 2 feet from the rear wall. Vertical listening window is narrower than typical, a consequence of the AMT ribbon tweeter’s tall physical size: staying within about ±15-20° of the tweeter reference axis (or slightly below it) is important. Impedance dips to about 3.1 ohms with a 1.4-ohm minimum EPDR, meaning a dedicated amplifier is recommended over an AVR due to potential power-supply strain. Distortion rises at the very lowest frequencies (an expected limitation of a 6.5” woofer), and the woofer audibly struggles with extreme 30-35Hz content at high volume. Horizontal directivity narrows from about ±70° to ±50° above roughly 6-7kHz as the ribbon tweeter’s pattern collapses inward.
Full Wharfedale Aura 2 review and specifications →
| Released | May 2023 (3 years ago) |
|---|---|
| Bass Extension (-10dB) | 30Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 56Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 22.1”H x 11.3”W x 15.3”D (561.3 x 287 x 388.6 mm) |
| Drivers | 6.5” Black Glass Fibre Matrix Cone woofer, 4” Black Glass Fibre Matrix Cone midrange, 27x90mm AMT tweeter |
| Impedance | 6 ohms nominal (3.1 ohms minimum above 80Hz, measured, Erin’s Audio Corner) |
| Sensitivity | 87dB (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 6.03 |
| Spinorama Preference Score with Perfect Sub | 7.65 |
| Weight | 45 lbs (20.4 kg) each |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Why the Wharfedale AURA 2 Will Blow Your Mind More from Erin’s Audio Corner →
- 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 Website Wharfedale Aura 2
- Erin’s Audio Corner Measurements (spinorama.org)
- Head-to-Head Comparisons
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