Short answer: the Ascend Acoustics CMT-340 SE2. It ranks #23 of 130 bookshelf speakers by sound quality at $798; the Sonus Faber Lumina II ranks #91 and costs $1600, so there is not much of a tradeoff to weigh.
What the Ascend Acoustics CMT-340 SE2 offers: High-quality manufacturer Klippel NFS data shows 0.295dB on-axis average absolute deviation, 0.531 listening-window smoothness, and a strong 7.17 preference score with a subwoofer. Its dual 6.5-inch woofers, 92dB anechoic sensitivity, and 240W continuous power rating support high output and dynamics. Watch for: Bass rolls off early for the cabinet size, measuring 77.6Hz at -3dB, 64.5Hz at -6dB, and 48.3Hz at -12dB; the preference score without a subwoofer is only 4.51. The 4.35 sound-power directivity-index standard deviation also indicates more off-axis variation than the strongest designs, and the rear port needs placement clearance.
What the Sonus Faber Lumina II offers: Handmade in Italy with a gloss-finished front baffle and black leather-wrapped cabinet - genuinely nice-looking speaker with real brand cachet. Bass extension is competitive for the size, reaching about 50 Hz in-room with mild compression and good distortion figures, so higher output levels and greater listening distances aren’t a problem down to that point. About 20 dB of dynamic range at typical listening levels (73 dB at 4m), which comfortably covers most music without the tonal balance shifting as instruments and vocals peak. Off-axis behavior is consistent - toeing the speakers 20-30 degrees out doesn’t meaningfully change the in-room high-frequency character, so placement flexibility is good once you’ve dialed in the tonal balance. Watch for: Not a neutral speaker - has a persistent high-frequency boost/lift that makes it sound forward and bright, present whether pointed directly at the listener or toed out. A slightly nasal quality traced to a resonance around 1 kHz that EQ can address. The reviewer needed to trim treble by about 4 dB on his preamp to get the tonal balance he wanted, meaning most listeners will want equalization available to fully enjoy this speaker. At roughly the same $1,000ish price point, alternatives like the Ascend Acoustics Sierra 1 V2 measure more linear (with a tradeoff in distortion and crossover-region directivity), and the Dynaudio Emit 20 offers deeper bass extension and lower compression at the cost of a more deliberately colored tonal signature.
Buy the Ascend Acoustics CMT-340 SE2. It ranks higher for sound quality than the Sonus Faber Lumina II and costs less, so the other one has nothing left to offer.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Ascend Acoustics CMT-340 SE2 | Sonus Faber Lumina II | |
|---|---|---|
| Price | $798 per pair | $1,600 per pair |
| Ranked | #23 of 130 in Large Size Bookshelf Speakers | #91 of 130 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | 77.6Hz (measured, spinorama.org) | 60Hz (measured, Erin's Audio Corner) |
| Bass Extension (-10dB) | approximately 53Hz (measured, spinorama.org) | 41Hz (measured, Erin's Audio Corner) |
| Drivers | Two 6.5-inch woofers; 27mm soft-dome tweeter | 29mm DAD dome tweeter, 150mm paper cone mid-woofer |
| Sensitivity | 92dB at 2.83V/1m anechoic | 86dB (measured average, Erin's Audio Corner; matches manufacturer spec) |
| Impedance | 8 ohms nominal | 4 ohms nominal, 4.1 ohms minimum (measured, Erin's Audio Corner) |
| Power Handling | 240W continuous; 400W short-term peak | - |
| Dimensions | 21 x 7.5 x 10.5 in each | 12" x 7.1" x 10.4" (304 x 180 x 263 mm) |
| Weight | 29.1 lbs (13.2 kg) each | 12.5 lbs (5.65 kg) each |
| Spinorama Preference Score | 4.51 | 3.04 |
| Spinorama Preference Score with Perfect Sub | 7.17 | 5.32 |
| Crossover Frequency | - | 1800Hz |
| Frequency Response | - | 55Hz - 24kHz (manufacturer specified) |
| Recommended Power | - | 30W - 150W |
Related Speaker Comparisons
How Ascend Acoustics CMT-340 SE2 compares with other leading options:
- Ascend Acoustics CMT-340 SE2 vs Perlisten S4b
- KEF Reference 1 Meta vs Ascend Acoustics CMT-340 SE2
- Ascend Acoustics CMT-340 SE2 vs GR-Research NX-Studio
- AsciLab C6B vs Ascend Acoustics CMT-340 SE2
- Audio First Cadentia 3 vs Ascend Acoustics CMT-340 SE2
Prices on this page were last checked September 16, 2026 at 12:41 AM 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 CMT-340 SE2: $798 per pair Ascend Acoustics eBay
Pros: High-quality manufacturer Klippel NFS data shows 0.295dB on-axis average absolute deviation, 0.531 listening-window smoothness, and a strong 7.17 preference score with a subwoofer. Its dual 6.5-inch woofers, 92dB anechoic sensitivity, and 240W continuous power rating support high output and dynamics. Measured bass extension of 77.6Hz (-3dB).
Cons: Bass rolls off early for the cabinet size, measuring 77.6Hz at -3dB, 64.5Hz at -6dB, and 48.3Hz at -12dB; the preference score without a subwoofer is only 4.51. The 4.35 sound-power directivity-index standard deviation also indicates more off-axis variation than the strongest designs, and the rear port needs placement clearance.
Full Ascend Acoustics CMT-340 SE2 review and specifications →
| Bass Extension (-10dB) | approximately 53Hz (measured, spinorama.org) |
|---|---|
| Bass Extension (-3dB) | 77.6Hz (measured, spinorama.org) |
| Dimensions | 21 x 7.5 x 10.5 in each |
| Drivers | Two 6.5-inch woofers; 27mm soft-dome tweeter |
| Impedance | 8 ohms nominal |
| Power Handling | 240W continuous; 400W short-term peak |
| Sensitivity | 92dB at 2.83V/1m anechoic |
| Spinorama Preference Score | 4.51 |
| Spinorama Preference Score with Perfect Sub | 7.17 |
| Weight | 29.1 lbs (13.2 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
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Sonus Faber Lumina II: $1,600 per pair Crutchfield eBay
Pros: Handmade in Italy with a gloss-finished front baffle and black leather-wrapped cabinet - genuinely nice-looking speaker with real brand cachet. Bass extension is competitive for the size, reaching about 50 Hz in-room with mild compression and good distortion figures, so higher output levels and greater listening distances aren’t a problem down to that point. About 20 dB of dynamic range at typical listening levels (73 dB at 4m), which comfortably covers most music without the tonal balance shifting as instruments and vocals peak. Off-axis behavior is consistent - toeing the speakers 20-30 degrees out doesn’t meaningfully change the in-room high-frequency character, so placement flexibility is good once you’ve dialed in the tonal balance. Measured bass extension of 60Hz (-3dB), with a measured sensitivity of 86dB.
Cons: Not a neutral speaker - has a persistent high-frequency boost/lift that makes it sound forward and bright, present whether pointed directly at the listener or toed out. A slightly nasal quality traced to a resonance around 1 kHz that EQ can address. The reviewer needed to trim treble by about 4 dB on his preamp to get the tonal balance he wanted, meaning most listeners will want equalization available to fully enjoy this speaker. At roughly the same $1,000ish price point, alternatives like the Ascend Acoustics Sierra 1 V2 measure more linear (with a tradeoff in distortion and crossover-region directivity), and the Dynaudio Emit 20 offers deeper bass extension and lower compression at the cost of a more deliberately colored tonal signature.
Full Sonus Faber Lumina II review and specifications →
| Bass Extension (-10dB) | 41Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 60Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 1800Hz |
| Dimensions | 12" x 7.1" x 10.4" (304 x 180 x 263 mm) |
| Drivers | 29mm DAD dome tweeter, 150mm paper cone mid-woofer |
| Frequency Response | 55Hz - 24kHz (manufacturer specified) |
| Impedance | 4 ohms nominal, 4.1 ohms minimum (measured, Erin's Audio Corner) |
| Recommended Power | 30W - 150W |
| Sensitivity | 86dB (measured average, Erin's Audio Corner; matches manufacturer spec) |
| Spinorama Preference Score | 3.04 |
| Spinorama Preference Score with Perfect Sub | 5.32 |
| Weight | 12.5 lbs (5.65 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sonus Faber Lumina II vs Polk Monitor XT20
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