Short answer: the Wharfedale Diamond 12.1. It ranks #13 of 56 bookshelf speakers by sound quality at $599; the ELAC BS U5 ranks #29 and costs $856, so there is not much of a tradeoff to weigh.
What the Wharfedale Diamond 12.1 gets right: A budget two-way bookshelf speaker (5” polypropylene woofer, 1” textile dome tweeter) that measures well for its price: harmonic distortion at 86dB stays under 1% THD down to about 60Hz. The catch: A dip of about 3dB in the 1-3kHz crossover region (on-axis, in the predicted in-room response, and even off-axis) gives the speaker a soft, “laid-back” character that noticeably saps attack and transient bite from drums.
What the ELAC BS U5 offers: This slim three-way coaxial design (an Andrew Jones creation) shows a fairly even on-axis response up to 3kHz, with off-axis behavior notably smoother than the on-axis curve. Watch for: Distortion is very high right at both crossover points - around 270Hz (mid-range) and 2700Hz (tweeter) - at both 86dB and 96dB SPL/1m, exceeding 3% at the mid-range crossover.
Buy the Wharfedale Diamond 12.1. It ranks higher for sound quality than the ELAC BS U5 and costs less, so there is no real case for the other one.
Specifications Side By Side
| Wharfedale Diamond 12.1 | ELAC BS U5 | |
|---|---|---|
| Price | $599 Discontinued | $856 Discontinued |
| Ranked | #13 of 56 in Medium Size Bookshelf Speakers | #29 of 56 in Medium Size Bookshelf Speakers |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | 60Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 61Hz (measured, Erin’s Audio Corner) | 78Hz (measured, Audio Science Review) |
| Crossover Frequency | 2.6kHz | - |
| Dimensions | 12.2"H x 7"W x 10.9"D (310 x 178 x 277 mm) | 13.4"H x 7"W x 11.5"D (339.1 x 178.0 x 293.1 mm) |
| Impedance | 8 ohms nominal (3.9 ohms minimum above 80Hz, measured, Erin’s Audio Corner) | 4 ohms nominal (3.4 ohms minimum) |
| Sensitivity | 84dB (measured by Erin’s Audio Corner; 87dB manufacturer specified) | 83dB (2.83V/1m, measured, Audio Science Review) |
| Drivers | 5" advanced polypropylene cone woofer, 1" textile dome tweeter | 1" tweeter + 5.25" woofer |
| Discontinued | Yes | Yes |
| Weight | 15 lbs / 6.8 kg each | 13.2 lbs / 6 kg |
| Woofer Cabinet | ported | ported, rear |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- JBL Stage 2 250B vs JBL L52 Classic
- Dynaudio Emit M10 vs ELAC Uni-Fi 2.0 UB52
- JBL Stage 2 250B vs Q Acoustics 5020
- ELAC BS U5 vs ELAC Uni-Fi 2.0 UB52
- ELAC BS U5 vs KEF Q100
The Two Speakers In Full
Wharfedale Diamond 12.1: $599 Discontinued
Pros: A budget two-way bookshelf speaker (5” polypropylene woofer, 1” textile dome tweeter) that measures well for its price: harmonic distortion at 86dB stays under 1% THD down to about 60Hz, genuinely good for a 5” mid-woofer. Wide horizontal radiation of about ±60° up to roughly 5kHz before the tweeter starts to beam. Tonally smooth and easy to listen to at moderate volumes, with a pleasant, non-fatiguing character the reviewer said he’d happily recommend to someone who wants noticeably better fit, finish and looks than typical speakers in the $300-400 range. A high-pass crossover around 80Hz meaningfully cleans up midrange multitone distortion, so pairing it with a subwoofer helps more than usual for a speaker this size.
Cons: A dip of about 3dB in the 1-3kHz crossover region (on-axis, in the predicted in-room response, and even off-axis) gives the speaker a soft, “laid-back” character that noticeably saps attack and transient bite from drums, guitar and other percussive material - possibly an intentional BBC-style dip, but one the reviewer would still prefer tuned flat. Vertical directivity is unusually tight for this class of speaker, holding together only within about ±5° of the tweeter axis before a real hole opens up in the response, so seating height matters a lot more than on most bookshelf designs. Diffraction artifacts around 3kHz and 5kHz show up as differences between the listening-window and on-axis curves. Distortion climbs well past acceptable levels at higher output - harmonic distortion exceeds 3% around 150Hz at 96dB (versus under 1% at 86dB), multitone distortion tops 10% at 96dB/1m, and real compression sets in between 96-102dB (about 1.5dB of lost dynamic range around 300Hz at 102dB/1m, roughly equivalent to 92dB for a pair at 4m in a room) - a genuine limitation on how loud or how far away this speaker can be pushed. Measured average sensitivity (84dB) runs a few dB below the 87dB spec. Only a 5” woofer, so a subwoofer is required for real bass. Discontinued.
Full Wharfedale Diamond 12.1 review and specifications →
| Bass Extension (-10dB) | 46Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 61Hz (measured, Erin's Audio Corner) |
| Crossover Frequency | 2.6kHz |
| Dimensions | 12.2"H x 7"W x 10.9"D (310 x 178 x 277 mm) |
| Discontinued | Yes |
| Drivers | 5" advanced polypropylene cone woofer, 1" textile dome tweeter |
| Impedance | 8 ohms nominal (3.9 ohms minimum above 80Hz, measured, Erin's Audio Corner) |
| Sensitivity | 84dB (measured by Erin's Audio Corner; 87dB manufacturer specified) |
| Weight | 15 lbs / 6.8 kg each |
| Woofer Cabinet | ported |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Wharfedale Diamond 12.1 vs Radiant Acoustics Clarity 4.2
- Wharfedale Diamond 12.1 vs Wharfedale Super Denton
- Wharfedale Diamond 12.1 vs Klipsch RP-500M II
- Wharfedale Diamond 12.1 vs KEF Q150
- Wharfedale Diamond 12.1 vs Revel M105
- Wharfedale Diamond 12.1 vs Wharfedale Diamond 220
- Wharfedale Diamond 12.1 vs Arendal 1961 Monitor
- Wharfedale Diamond 12.1 vs KEF LS50 Meta
- See all 18 comparisons
ELAC BS U5: $856 Discontinued
Pros: This slim three-way coaxial design (an Andrew Jones creation) shows a fairly even on-axis response up to 3kHz, with off-axis behavior notably smoother than the on-axis curve. Predicted in-room response looks like it should give good tonality. Vertical directivity is better than average, a benefit of the coaxial layout.
Cons: Distortion is very high right at both crossover points - around 270Hz (mid-range) and 2700Hz (tweeter) - at both 86dB and 96dB SPL/1m, exceeding 3% at the mid-range crossover. Minimum impedance dips to 3.4 ohms with a possible resonance around 500Hz visible in the impedance/phase curve. Discontinued.
Full ELAC BS U5 review and specifications →
| Bass Extension (-10dB) | 60Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 78Hz (measured, Audio Science Review) |
| Dimensions | 13.4"H x 7"W x 11.5"D (339.1 x 178.0 x 293.1 mm) |
| Discontinued | Yes |
| Drivers | 1" tweeter + 5.25" woofer |
| Impedance | 4 ohms nominal (3.4 ohms minimum) |
| Sensitivity | 83dB (2.83V/1m, measured, Audio Science Review) |
| Weight | 13.2 lbs / 6 kg |
| Woofer Cabinet | ported, rear |
As an eBay Partner, we may be compensated if you make a purchase.
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- ELAC BS U5 vs JBL Stage 2 250B
- ELAC BS U5 vs Dynaudio Emit M10
- ELAC BS U5 vs Acoustic Energy AE100 Mk2
- ELAC BS U5 vs Dynaudio X14
- ELAC BS U5 vs Paradigm Monitor SE Atom
- ELAC BS U5 vs Sony SS-CS5 M2
- ELAC BS U5 vs Pioneer SP-BS22-LR (Philharmonic AAM Mod)
- ELAC BS U5 vs JBL L52 Classic
- See all 19 comparisons