Short answer: the Infinity IL10 for an even budget response; the KEF Q3 Meta for wide dispersion. The IL10 is impressively flat for a budget bookshelf, though resonances at 600 and 5kHz show up as distortion spikes at 96dB SPL/1m. The KEF’s coaxial design spreads sound about ±60 degrees horizontally and vertically, but compression and strain appear in the 1-2kHz region above about 90dB at 10 feet.
Buy the KEF Q3 Meta, since the Infinity IL10 is discontinued and only worth hunting down used.
Want more options? Browse the full Passive Home rankings.
Specifications Side By Side
| Infinity IL10 | KEF Q3 Meta | |
|---|---|---|
| Price | $160 per pair used, Discontinued | $899.99 per pair |
| Ranked | #87 of 134 in Large Size Bookshelf Speakers | #92 of 134 in Large Size Bookshelf Speakers |
| Bass Extension (-10dB) | 44Hz (measured, Audio Science Review) | 37Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 59Hz (measured, Audio Science Review) | 52Hz (measured, Erin’s Audio Corner) |
| Impedance | 6 ohms | 4 ohms nominal, 3.7 ohms minimum (measured above 80Hz, Erin’s Audio Corner) |
| Sensitivity | 86dB (measured, Audio Science Review) | 84.5dB (measured average 300Hz-3kHz @ 2.83V/1m, Erin’s Audio Corner; 87dB manufacturer specified) |
| Drivers | 6.5” (165mm) woofer | 165 mm (6.5 in.) aluminium cone woofer, 25 mm (1 in.) vented aluminium dome with MAT tweeter |
| Weight | 14.3 lbs (6.5 kg) | 15.9 lbs (7.2 kg) |
| Dimensions | 15.6”H x 8.5”W x 11.5”D (397.0 x 216.0 x 292.0 mm) | 14.1”H x 8.3”W x 12”D (357.0 x 210.0 x 305.0 mm) |
| Woofer Cabinet | ported, rear | ported, rear |
| Spinorama Preference Score | 4.98 (spinorama.org) | 4.66 |
| Spinorama Preference Score with Perfect Sub | 7.34 (spinorama.org) | 6.50 |
| DIY Kit | No | No |
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Prices on this page were last checked October 2, 2026 at 10:18 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Infinity IL10: $160 per pair used Discontinued eBay
Pros: Impressively flat for a budget bookshelf. Predicted in-room response is good aside from a bit of excess energy here and there. Distortion at 96dB SPL/1m stays low and controlled outside two narrow resonance-driven peaks. Measured bass extension of 59Hz (-3dB), with a measured sensitivity of 86dB.
Cons: Resonances at 600 and 5kHz, which show up as distinct distortion spikes at 96dB SPL/1m in the same frequency regions. Discontinued.
Full Infinity IL10 review and specifications →
| Bass Extension (-10dB) | 44Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 59Hz (measured, Audio Science Review) |
| DIY Kit | No |
| Dimensions | 15.6”H x 8.5”W x 11.5”D (397.0 x 216.0 x 292.0 mm) |
| Drivers | 6.5” (165mm) woofer |
| Impedance | 6 ohms |
| Sensitivity | 86dB (measured, Audio Science Review) |
| Spinorama Preference Score | 4.98 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 7.34 (spinorama.org) |
| Weight | 14.3 lbs (6.5 kg) |
| Woofer Cabinet | ported, rear |
- Reviews, Comparisons and Sound Samples
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KEF Q3 Meta: $899.99 per pair Amazon Crutchfield eBay
Older model: the KEF Q350 (ranked lower, rated 3/5).
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. Measured bass extension of 52Hz (-3dB), with a measured sensitivity of 84.5dB.
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) |
| DIY Kit | No |
| 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) |
| Spinorama Preference Score | 4.66 |
| Spinorama Preference Score with Perfect Sub | 6.50 |
| Weight | 15.9 lbs (7.2 kg) |
| Woofer Cabinet | ported, rear |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons