Short answer: the Definitive Technology Demand D11, because the ELAC UBR62 is hard to drive. The D11’s spinorama is mostly flat and well-controlled, close to class-leading but for a narrow ~600Hz jaggy that appears consistently on and off axis. Erin measured the UBR62 at just 83dB/2.83V/1m sensitivity, so his 110W Parasound could not complete the high-level test and the more powerful HINT 6 was needed.
Buy the ELAC Uni-Fi Reference UBR62. It is rated higher for sound quality; the Definitive Technology Demand D11 is no longer sold new.
Still deciding? The full Passive Home rankings cover every ranked option.
Specifications Side By Side
| ELAC Uni-Fi Reference UBR62 | Definitive Technology Demand D11 | |
|---|---|---|
| Price | $1,199 per pair | $999 per pair Discontinued |
| Ranked | #54 of 134 in Large Size Bookshelf Speakers | #59 of 134 in Large Size Bookshelf Speakers |
| Bass Extension | 41Hz manufacturer specified; Erin’s response-linearity graph shows limited high-output bass headroom | - |
| Bass Extension (-3dB) | 58.6Hz (measured, Erin’s Audio Corner) | 60.1Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 41.9Hz (measured, Erin’s Audio Corner) | 46.3Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Sensitivity | 83dB/2.83V/1m (measured, Erin’s Audio Corner) | 87dB (2.83V/1m, measured, Audio Science Review) |
| Impedance | 4 ohms minimum near 50Hz (measured, Erin’s Audio Corner) | 8 ohms nominal |
| Drivers | 1” tweeter coaxial with 4” midrange; 6.5” woofer | 6.5” BDSS polypropylene woofer, 1” aluminum dome tweeter (offset), 6x10” oval passive radiator |
| Dimensions | 14.1”H x 8.2”W x 13.1”D | 13H x 7.25W x 12.5D in |
| Woofer Cabinet | ported, dual front slot vents | passive radiator |
| Weight | 23.5 lbs (10.68 kg) each | 17 lbs (7.7 kg) each |
| Spinorama Preference Score | 5.44 (measured, spinorama.org) | 4.12 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.7 (measured, spinorama.org) | 6.48 (spinorama.org) |
| DIY Kit | No | No |
| Frequency Response | - | 48Hz - 24kHz (61Hz - 22kHz -3dB) (Manufacturer specified) |
| Power Handling | - | 20-200W recommended |
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The Two Speakers In Full
ELAC Uni-Fi Reference UBR62: $1,199 per pair Amazon eBay
Pros: True three-way stand-mount using a 1-inch tweeter concentrically mounted in a 4-inch aluminum midrange plus a dedicated 6.5-inch aluminum woofer. Erin found the directivity and overall tonality well controlled, with dual front slot vents minimizing placement sensitivity and cabinet bracing suppressing obvious coloration. The mostly 5-ohm-or-higher load is manageable for a genuinely 4-ohm-capable amplifier, and the coherent concentric upper range supports stable imaging across seats. Measured bass extension of 58.6Hz (-3dB), with a measured sensitivity of 83dB.
Cons: Erin measured very low 83dB/2.83V/1m sensitivity; his 110W Parasound was insufficient for the high-level test and the more powerful HINT 6 was needed. Impedance reaches 4 ohms near 50Hz (Erin), while woofer excursion and bass output were less capable than expected for the cabinet size. A broad 500-700Hz rise and associated lower/female-vocal coloration were audible, and the slightly subdued listening-window treble is necessary to avoid an overly bright in-room balance rather than evidence of ruler-flat axial tuning.
Full ELAC Uni-Fi Reference UBR62 review and specifications →
| Bass Extension | 41Hz manufacturer specified; Erin’s response-linearity graph shows limited high-output bass headroom |
|---|---|
| Bass Extension (-10dB) | 41.9Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 58.6Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No |
| Dimensions | 14.1”H x 8.2”W x 13.1”D |
| Drivers | 1” tweeter coaxial with 4” midrange; 6.5” woofer |
| Impedance | 4 ohms minimum near 50Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 83dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.44 (measured, spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.7 (measured, spinorama.org) |
| Weight | 23.5 lbs (10.68 kg) each |
| Woofer Cabinet | ported, dual front slot vents |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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Definitive Technology Demand D11: $999 per pair Discontinued Amazon eBay
Pros: CEA2034 spinorama shows a mostly flat, well-controlled response: close to class-leading if not for one narrow resonance. Distortion is well controlled and the deep cabinet lets it play loud without bottoming out except on the deepest bass content. Cabinet construction and finish are a clear step above budget speakers. Measured bass extension of 60.1Hz (-3dB), with a measured sensitivity of 87dB.
Cons: A narrow but real ~600Hz jaggy shows up consistently in on-axis and off-axis measurements. Horizontal directivity is uneven because of the offset tweeter position, giving the left and right channels slightly different off-axis energy. There’s a low-frequency rattle/noise at very deep bass levels the reviewer called “horrendous.” Discontinued; the Demand series has moved on to newer models.
Full Definitive Technology Demand D11 review and specifications →
| Bass Extension (-10dB) | 46.3Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 60.1Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 13H x 7.25W x 12.5D in |
| Drivers | 6.5” BDSS polypropylene woofer, 1” aluminum dome tweeter (offset), 6x10” oval passive radiator |
| Frequency Response | 48Hz - 24kHz (61Hz - 22kHz -3dB) (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Power Handling | 20-200W recommended |
| Sensitivity | 87dB (2.83V/1m, measured, Audio Science Review) |
| Spinorama Preference Score | 4.12 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.48 (spinorama.org) |
| Weight | 17 lbs (7.7 kg) each |
| Woofer Cabinet | passive radiator |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Definitive Technology Demand D11 vs Yamaha NS-800A
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