Short answer: the KEF Q3 Meta for better sound quality, the Emotiva Airmotiv B2+ for the lower price. The KEF Q3 Meta ranks #64 of 100 bookshelf speakers at $899.99. The Emotiva Airmotiv B2+ ranks #72 at $449, $450.99 cheaper.
What the KEF Q3 Meta offers: Coaxial two-way design (1” vented aluminum dome tweeter with Meta absorber embedded in a 6.5” aluminum cone mid/bass driver) delivering unusually wide dispersion both horizontally and vertically (about ±60° each) -. Watch for: Not well suited to high-output use: compression and strain in the 1-2kHz region emerge above about 90dB at 10 feet, so a high-output home theater setup isn’t the best application.
The case for the Emotiva Airmotiv B2+: Erin measured a useful 86dB average sensitivity and strong midbass punch around 120Hz. The tradeoff: The replacement B2+ did not deliver the neutral upgrade Erin expected.
Buy the KEF Q3 Meta if sound quality matters more than the price. Buy the Emotiva Airmotiv B2+ if the price matters more than sound quality.
Specifications Side By Side
| KEF Q3 Meta | Emotiva Airmotiv B2+ | |
|---|---|---|
| Price | $899.99 | $449.00 |
| Ranked | #64 of 100 in Large Size Bookshelf Speakers | #72 of 100 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 37Hz (measured, Erin’s Audio Corner) | 43Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 52Hz (measured, Erin’s Audio Corner) | 66Hz (measured, Erin’s Audio Corner) |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin’s Audio Corner) | 4 ohms nominal (manufacturer specified) |
| Sensitivity | 84.5dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin’s Audio Corner; 87dB manufacturer specified) | 86dB (measured average, Erin’s Audio Corner) |
| Drivers | 165 mm (6.5 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with MAT tweeter | 6.5" woven-fiber woofer, 32 x 25mm folded-ribbon tweeter |
| Woofer Cabinet | ported, rear | ported, rear |
| Weight | 15.9 lbs / 7.2 kg | - |
| Dimensions | 14.1"H x 8.3"W x 12"D (357.0 x 210.0 x 305.0 mm) | - |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- SVS Prime Bookshelf vs Polk Reserve R100
- JBL Studio 630 vs SVS Prime Bookshelf
- SVS Prime Bookshelf vs Revel Performa M22
- Polk R200 vs Emotiva Airmotiv B2+
- ELAC Debut 2.0 B6.2 vs KEF Q3 Meta
The Two Speakers In Full
KEF Q3 Meta: $899.99 Amazon Crutchfield
Pros: Coaxial two-way design (1” vented aluminum dome tweeter with Meta absorber embedded in a 6.5” aluminum cone mid/bass driver) delivering unusually wide dispersion both horizontally and vertically (about ±60° each) - wider than typical KEF models, which usually run closer to ±50° horizontal and ±15-20° vertical for non-coaxial designs. A deliberate ~2dB bump around 120Hz gives a satisfying sense of kick-drum impact, a voicing choice the reviewer personally favors even though it’s not strictly accurate. Extended bass-shelf tuning allows placement close to a rear wall (about 1 foot) without sounding boomy. Good directivity overall means it takes well to EQ correction if desired. Cabinet resonances around 350-370Hz and 600Hz look concerning in impedance measurements, but blind ABX testing (24 trials) after adding damping material couldn’t reliably distinguish the treated cabinet from the untreated one - these particular resonances appear to fall below the threshold of audibility. Sturdier build than previous KEF Q-series models.
Cons: Not well suited to high-output use: compression and strain in the 1-2kHz region emerge above about 90dB at 10 feet, so a high-output home theater setup isn’t the best application. A slight loss of attack and clarity around 1-2kHz was noticeable both subjectively and in measurements. F3 of 52Hz with a fairly quick rolloff below 50Hz means a subwoofer is still recommended for real bass extension, even for moderate-volume home theater use. Sealed configuration (using the included port bungs) pushes the bass rolloff up into the 100Hz+ region - the reviewer recommends leaving it in ported mode instead. Sounds best pointed directly at the listener; toeing it out 30° rolls off the top end without a meaningful soundstage benefit. Compression testing shows real breakdown at 102dB/1m, with the woofer losing excursion control - confirms the practical output ceiling. An unexplained -5dB dip appears in on-axis measurements that the reviewer couldn’t attribute to a specific cause.
Full KEF Q3 Meta review and specifications →
| Bass Extension (-10dB) | 37Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 52Hz (measured, Erin's Audio Corner) |
| Dimensions | 14.1"H x 8.3"W x 12"D (357.0 x 210.0 x 305.0 mm) |
| Drivers | 165 mm (6.5 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with MAT tweeter |
| Impedance | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin's Audio Corner) |
| Sensitivity | 84.5dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin's Audio Corner; 87dB manufacturer specified) |
| Weight | 15.9 lbs / 7.2 kg |
| Woofer Cabinet | ported, rear |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Emotiva Airmotiv B2+: $449.00
Pros: Erin measured a useful 86dB average sensitivity and strong midbass punch around 120Hz. The folded-ribbon tweeter provides very broad upper-treble radiation, and the speaker can create a spacious presentation when positioned carefully. Response and directivity remain reasonably orderly below the roughly 2kHz crossover region. The 6.5-inch woofer offers more output capability than compact 5-inch competitors, while F3/F10 of 66/43Hz leave adequate overlap for a conventional 80Hz subwoofer crossover. Horizontal directivity data makes the broad baffle-step trend amenable to partial EQ below the crossover.
Cons: The replacement B2+ did not deliver the neutral upgrade Erin expected. A baffle-step loss around 500Hz depresses the lower midrange while the AMT’s much wider radiation above crossover injects excess room energy, yielding a bright, forward balance and false impression of cymbal detail. The directivity discontinuity near 2kHz cannot be completely equalized. Erin measured F3 at 66Hz and F10 at 43Hz, so meaningful kick-drum fundamentals and low bass still need a subwoofer. Vertical listening tolerance is roughly +/-10 degrees, with best results between the top of the woofer and tweeter axes. Broad lateral treble energy may require careful toe-out and sidewall absorption. Despite a large cabinet, it offers limited deep-bass advantage and was not Erin’s hoped-for successor to the more linear B1+.
Full Emotiva Airmotiv B2+ review and specifications →
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 66Hz (measured, Erin's Audio Corner) |
| Drivers | 6.5" woven-fiber woofer, 32 x 25mm folded-ribbon tweeter |
| Impedance | 4 ohms nominal (manufacturer specified) |
| Sensitivity | 86dB (measured average, Erin's Audio Corner) |
| 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
- Emotiva Airmotiv B2+ vs JBL XPL-90
- Emotiva Airmotiv B2+ vs Polk Reserve R100
- Emotiva Airmotiv B2+ vs Sonus Faber Sonetto II G2
- Emotiva Airmotiv B2+ vs Polk R200
- Emotiva Airmotiv B2+ vs Revel Performa M22
- Emotiva Airmotiv B2+ vs KEF Q350
- Emotiva Airmotiv B2+ vs Sonus Faber Lumina II Amator
- Emotiva Airmotiv B2+ vs Focal Aria 906
- See all 14 comparisons