Short answer: the ELAC Uni-Fi Reference UBR62 for better sound quality, the Definitive Technology Demand D11 for the lower price. The ELAC Uni-Fi Reference UBR62 ranks #41 of 100 bookshelf speakers at $1199. The Definitive Technology Demand D11 ranks #44 at $999, $200 cheaper.
What the ELAC Uni-Fi Reference UBR62 gets right: 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. The catch: 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.
What the Definitive Technology Demand D11 offers: CEA2034 spinorama shows a mostly flat, well-controlled response - close to class-leading if not for one narrow resonance. Watch for: A narrow but real ~600Hz jaggy shows up consistently in on-axis and off-axis measurements.
Buy the ELAC Uni-Fi Reference UBR62 if sound quality matters more than the price. Buy the Definitive Technology Demand D11 if the price matters more than sound quality.
Specifications Side By Side
| ELAC Uni-Fi Reference UBR62 | Definitive Technology Demand D11 | |
|---|---|---|
| Price | $1,199/pair | $999 Discontinued |
| Ranked | #41 of 100 in Large Size Bookshelf Speakers | #44 of 100 in Large Size Bookshelf Speakers |
| Bass Extension | 41Hz manufacturer specified; Erin’s response-linearity graph shows limited high-output bass headroom | - |
| 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 |
| Bass Extension (-3dB) | - | 80Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | - | 62Hz (measured, Audio Science Review) |
| Discontinued | - | Yes |
| Weight | - | 17 lbs each |
| 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/pair Amazon
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.
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 |
|---|---|
| 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) |
| Woofer Cabinet | ported, dual front slot vents |
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- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- ELAC Uni-Fi Reference UBR62 vs ELAC DBR62
- ELAC Uni-Fi Reference UBR62 vs Power Sound Audio MT-110-M
- ELAC Uni-Fi Reference UBR62 vs Yamaha NS-800A
- ELAC Uni-Fi Reference UBR62 vs Revel Concerta2 M16
- ELAC Uni-Fi Reference UBR62 vs Dynaudio Contour 20i
- ELAC Uni-Fi Reference UBR62 vs SVS Ultra Bookshelf
- ELAC Uni-Fi Reference UBR62 vs JBL HDI-1600
- ELAC Uni-Fi Reference UBR62 vs ELAC DB63
- See all 10 comparisons
Definitive Technology Demand D11: $999 Discontinued Amazon
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.
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. Discontinued.
Full Definitive Technology Demand D11 review and specifications →
| Bass Extension (-10dB) | 62Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 80Hz (measured, Audio Science Review) |
| Dimensions | 13H x 7.25W x 12.5D in |
| Discontinued | Yes |
| 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) |
| Weight | 17 lbs each |
| Woofer Cabinet | passive radiator |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Definitive Technology Demand D11 vs Yamaha NS-800A
- Definitive Technology Demand D11 vs Dynaudio Contour 20i
- Definitive Technology Demand D11 vs ELAC DBR62
- Definitive Technology Demand D11 vs SVS Ultra Bookshelf
- Definitive Technology Demand D11 vs Revel Concerta2 M16
- Definitive Technology Demand D11 vs Infinity Reference R162
- Definitive Technology Demand D11 vs JBL HDI-1600
- Definitive Technology Demand D11 vs Klipsch RP-600M II