Short answer: the Ascend Acoustics CMT-340 SE2. It ranks #23 of 130 bookshelf speakers by sound quality at $798; the Dynaudio Heritage Special ranks #28 and costs $7000, 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 Dynaudio Heritage Special offers: One of the rare cases where the reviewer measured a speaker as flawed but still genuinely enjoyed listening to it. A massive 4” voice coil on the midwoofer gives it exceptional output capability for a bookshelf speaker - averaged 100dB at 3.5 meters with no audible mechanical noise, port chuffing, or woofer bottoming even when deliberately pushed hard. Bass is very robust and doesn’t noticeably give up output as volume increases, staying solid at both low and high listening levels. Big, well-proportioned soundstage - wide without losing image focus. Limited run of 2,500 pairs with genuine collectible/heritage value; the tweeter (Esotar 3) and midwoofer both use premium Dynaudio-made drivers with an unusually wide, stout voice coil. Watch for: At lower listening volumes, dynamic range and kick-drum punch fell short of higher-sensitivity speakers the reviewer has tested (JBL 4367, KEF Reference 1 Meta) - the sheer output ceiling is impressive, but it isn’t a highly dynamic-sounding speaker at modest levels. A degree of “softness” in the upper mid-range. Selective sibilance in the 4-6kHz treble region that shows up on some tracks but not others, which the reviewer found mildly aggravating and would want to EQ down given the choice. Neither the tweeter nor the woofer is fully flush-mounted to the baffle, likely intentional as part of the heritage-styled look, but the reviewer wonders how much this affected linearity. At $7,000/pair MSRP (and a discontinued limited run, so used/open-box pricing around $5,000/pair is about the best you’ll do now), this is a serious investment for a bookshelf speaker.
Buy the Ascend Acoustics CMT-340 SE2. It ranks higher for sound quality than the Dynaudio Heritage Special and costs less, so there is no real case for the other one.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Ascend Acoustics CMT-340 SE2 | Dynaudio Heritage Special | |
|---|---|---|
| Price | $798 per pair | $7,000 per pair |
| Ranked | #23 of 130 in Large Size Bookshelf Speakers | #28 of 130 in Large Size Bookshelf Speakers |
| Bass Extension (-3dB) | 77.6Hz (measured, spinorama.org) | 52Hz (measured, Erin's Audio Corner) |
| Bass Extension (-10dB) | approximately 53Hz (measured, spinorama.org) | 38Hz (measured, Erin's Audio Corner) |
| Drivers | Two 6.5-inch woofers; 27mm soft-dome tweeter | 18cm MSP cone woofer, 28mm Esotar 3 dome tweeter |
| Sensitivity | 92dB at 2.83V/1m anechoic | 85dB (measured at 2.83V/1m, Erin's Audio Corner) |
| Impedance | 8 ohms nominal | 5.1 ohms minimum, ported mode (measured, Erin's Audio Corner) |
| Power Handling | 240W continuous; 400W short-term peak | - |
| Dimensions | 21 x 7.5 x 10.5 in each | 15.2"H x 8.2"W x 12.6"D (385 x 208 x 320 mm) |
| Weight | 29.1 lbs (13.2 kg) each | 24.3 lbs (11 kg) each |
| Spinorama Preference Score | 4.51 | 3.43 |
| Spinorama Preference Score with Perfect Sub | 7.17 | 5.44 |
| Discontinued | - | Yes (limited run of 2,500 pairs) |
| Country | - | Denmark |
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
- Head-to-Head Comparisons
- Ascend Acoustics CMT-340 SE2 vs Arendal 1528 Monitor 8
- Ascend Acoustics CMT-340 SE2 vs Wharfedale Super Linton
- Ascend Acoustics CMT-340 SE2 vs AsciLab F6Bs
- Ascend Acoustics CMT-340 SE2 vs MoFi SourcePoint 10
- Ascend Acoustics CMT-340 SE2 vs Radiant Acoustics Clarity 6.2
- Ascend Acoustics CMT-340 SE2 vs MoFi SourcePoint 8
- Ascend Acoustics CMT-340 SE2 vs Buchardt Audio E50
- Ascend Acoustics CMT-340 SE2 vs KEF R3
- See all 44 comparisons
Dynaudio Heritage Special: $7,000 per pair Safe and Sound HQ eBay
Pros: One of the rare cases where the reviewer measured a speaker as flawed but still genuinely enjoyed listening to it. A massive 4” voice coil on the midwoofer gives it exceptional output capability for a bookshelf speaker - averaged 100dB at 3.5 meters with no audible mechanical noise, port chuffing, or woofer bottoming even when deliberately pushed hard. Bass is very robust and doesn’t noticeably give up output as volume increases, staying solid at both low and high listening levels. Big, well-proportioned soundstage - wide without losing image focus. Limited run of 2,500 pairs with genuine collectible/heritage value; the tweeter (Esotar 3) and midwoofer both use premium Dynaudio-made drivers with an unusually wide, stout voice coil. Measured bass extension of 52Hz (-3dB), with a measured sensitivity of 85dB.
Cons: At lower listening volumes, dynamic range and kick-drum punch fell short of higher-sensitivity speakers the reviewer has tested (JBL 4367, KEF Reference 1 Meta) - the sheer output ceiling is impressive, but it isn’t a highly dynamic-sounding speaker at modest levels. A degree of “softness” in the upper mid-range. Selective sibilance in the 4-6kHz treble region that shows up on some tracks but not others, which the reviewer found mildly aggravating and would want to EQ down given the choice. Neither the tweeter nor the woofer is fully flush-mounted to the baffle, likely intentional as part of the heritage-styled look, but the reviewer wonders how much this affected linearity. At $7,000/pair MSRP (and a discontinued limited run, so used/open-box pricing around $5,000/pair is about the best you’ll do now), this is a serious investment for a bookshelf speaker.
Full Dynaudio Heritage Special review and specifications →
| Bass Extension (-10dB) | 38Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 52Hz (measured, Erin's Audio Corner) |
| Country | Denmark |
| Dimensions | 15.2"H x 8.2"W x 12.6"D (385 x 208 x 320 mm) |
| Discontinued | Yes (limited run of 2,500 pairs) |
| Drivers | 18cm MSP cone woofer, 28mm Esotar 3 dome tweeter |
| Impedance | 5.1 ohms minimum, ported mode (measured, Erin's Audio Corner) |
| Sensitivity | 85dB (measured at 2.83V/1m, Erin's Audio Corner) |
| Spinorama Preference Score | 3.43 |
| Spinorama Preference Score with Perfect Sub | 5.44 |
| Weight | 24.3 lbs (11 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Dynaudio Heritage Special vs Radiant Acoustics Clarity 6.2
- Dynaudio Heritage Special vs MoFi SourcePoint 10
- Dynaudio Heritage Special vs Wharfedale Linton 85
- Dynaudio Heritage Special vs Wharfedale Super Linton
- Dynaudio Heritage Special vs Ascend Acoustics Sierra-LX
- Dynaudio Heritage Special vs Arendal 1528 Monitor 8
- Dynaudio Heritage Special vs Revel M126Be
- Dynaudio Heritage Special vs ELAC VELA BS 403
- See all 47 comparisons