Short answer: the KEF Q Concerto Meta. It ranks #11 of 222 bookshelf speakers by sound quality (rated 4.6/5) at $999.99 and is still sold new; the Monolith Encore B6 ranks #99 (rated 3.9/5) and is discontinued, so it is only an option used.
The KEF Q Concerto Meta is the more accurate, deeper-bass choice. A neutral three way bookshelf speaker that sounds consistent from seat to seat, with smooth treble that many rivals at its price lack. Its measured preference score, a predictor of how neutral it sounds, is 6.01 against 4.67 for the Monolith Encore B6. Its bass reaches about 53Hz before falling 3dB, against 68Hz for the Monolith Encore B6. Watch for: Radiation pattern measures about ±50°, narrower than the reviewer’s preferred ±60° for a stronger sense of envelopment.
What the Monolith Encore B6 does well: Budget bookshelf speakers with punchy midbass, smooth wide dispersion and an unusually solid braced cabinet for the price. Watch for: Erin measured 85.3dB sensitivity and a 3.4-ohm minimum, so this is not an easy load despite its modest output ceiling.
Buy the KEF Q Concerto Meta. It is rated higher for sound quality and still sold new, while the Monolith Encore B6 is discontinued.
Still deciding? The full Passive Home rankings cover every ranked option.
Measured Differences
- Tonal accuracy above the bass: with a subwoofer taking the low end, the KEF Q Concerto Meta scores 7.7 against 6.9 for the Monolith Encore B6 on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
- Close enough not to matter: bass extension (35 Hz vs 37 Hz, 10 dB down).
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Specifications Side By Side
| KEF Q Concerto Meta | Monolith Encore B6 | |
|---|---|---|
| Price | $999.99 per pair | $360 per pair Discontinued |
| Ranked | #11 of 222 in Large Size Bookshelf Speakers | #99 of 222 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 35Hz (measured, Erin’s Audio Corner) | 37Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 53Hz (measured, Erin’s Audio Corner) | 68Hz (measured, Erin’s Audio Corner) |
| Dimensions | 16.3”H x 8.3”W x 12.4”D (414 x 210.8 x 315 mm) | 15.7H x 7.9W x 9.9D inches |
| Impedance | 4 ohms nominal (3.3 ohms minimum above 80Hz, measured by Erin’s Audio Corner) | 4 ohms nominal; 3.4 ohms minimum (measured, Erin’s Audio Corner) |
| Drivers | 165 mm (6.5 in.) hybrid aluminium cone woofer, 100 mm (4 in.) aluminium cone midrange, 19 mm (0.75 in.) vented aluminium dome with MAT tweeter | 6.5-inch pulp woofer; 25mm waveguided silk dome |
| Sensitivity | 84.2dB (measured average, Erin’s Audio Corner) | 85.3dB/2.83V/1m (measured, Erin’s Audio Corner) |
| Weight | 20.9 lbs (9.5 kg) each | 15.4 lbs (7.0 kg) each |
| Woofer Cabinet | ported, rear | - |
| Spinorama Preference Score | 6.01 | 4.67 |
| Spinorama Preference Score with Perfect Sub | 7.71 | 6.93 |
| DIY Kit | No | No |
Where the Ratings Come From
- KEF Q Concerto Meta: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- Monolith Encore B6: Spinorama.org measurements and reviews by Erin’s Audio Corner video.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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