Short answer: the KEF LSX II LT. Both are rated 4.0/5 for sound quality (#35 and #34 of 100 powered bookshelf speakers), and the KEF LSX II LT costs $549.99 against $999.99 for the Airpulse A100, with sound quality a draw, the lower price decides it.
The KEF LSX II LT is the deeper-bass choice. The coincident driver provides useful consistency across listening positions, and the app offers placement and subwoofer adjustments. Its bass reaches about 55Hz before falling 3dB, against 63Hz for the Airpulse A100. The catch: The 3.4dB midrange response span and treble-region dips keep it below more neutral monitors.
What the Airpulse A100 does well: ASR’s Klippel data gives a 2.9dB midrange span and scores of 4.56 standalone and 7.08 with an ideal subwoofer. It keeps a wired aux input, which the KEF LSX II LT lacks. It has an adjustable EQ, which the KEF LSX II LT lacks. Watch for: Bass reaches -3dB around 63Hz, so lower notes need a subwoofer for full weight.
Buy the KEF LSX II LT. Both are rated the same for sound quality, and it costs $450 less than the Airpulse A100.
Want more options? Browse the full Powered Home rankings.
Specifications Side By Side
| KEF LSX II LT | Airpulse A100 | |
|---|---|---|
| Price | $549.99 per pair | $999.99 per pair |
| Ranked | #35 of 100 in Medium Size Powered Bookshelf Speakers | #34 of 100 in Medium Size Powered Bookshelf Speakers |
| Dimensions | 9.5”H x 6.1”W x 7.1”D (241.3 x 154.9 x 180.3 mm) | 6.3” x 11.1” x 10” (160 x 283 x 255 mm) each |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth | RCA (aux), USB, optical, coaxial, Bluetooth aptX |
| Outputs | RCA Subwoofer | - |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter | Horn-loaded ribbon tweeter, 5” hard-anodized aluminum cone woofer |
| Weight | 15 lbs (6.8 kg) | 24.3 lbs (11 kg) each |
| App | No | None (physical bass/treble knobs, IR remote) |
| Bluetooth | Yes | Yes (SBC, aptX) |
| EQ | No | Yes, rear-panel bass/treble trim knobs |
| Amplifier Power | 100w RMS Per Speaker | 100W total (40W+40W woofer, 10W+10W tweeter) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 63.0Hz (measured, spinorama.org) |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | 53.2Hz (measured, spinorama.org) |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Spinorama Preference Score | 4.81 | 4.56 |
| Spinorama Preference Score with Perfect Sub | 7.03 | 7.08 |
| Subwoofer Output | Yes | - |
| XLR Input | No | No |
| RCA Input | No | Yes |
| TRS Input | No | No |
| Optical Input | Yes | Yes |
| Coaxial Input | No | Yes |
| USB Input | Yes | Yes |
| HDMI Input | Yes | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Frequency Response | 54Hz - 28kHz (±3dB) (Manufacturer specified) | 52Hz - 40kHz |
| Bluetooth Codecs | - | SBC, aptX |
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Prices on this page were last checked October 7, 2026 at 9:25 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
KEF LSX II LT: $549.99 per pair Amazon eBay
Same family: the KEF LSX II (larger bookshelf, estimated 4.1/5), the KEF LS50 Wireless II (larger bookshelf, ranked higher, rated 4.3/5) and the KEF LS60 (floorstanding, rated 4.8/5).
Pros: The coincident driver provides useful consistency across listening positions, and the app offers placement and subwoofer adjustments. Erin’s measurements give preference scores of 4.81 standalone and 7.03 with an ideal subwoofer, with -3dB bass around 56Hz. HDMI and USB connectivity make it convenient for a small TV or desktop system. Horizontal and vertical dispersion both reach about ±60°, giving a broad sweet spot for more than one seat. Measured bass extension of 55Hz (-3dB), with a measured sensitivity of 84dB.
Cons: The 3.4dB midrange response span and treble-region dips keep it below more neutral monitors. The existing review finds bass compression around 88-92dB/1m and rising distortion at higher levels, so the small drivers suit close listening rather than a large room. This LT version has no analog input; a turntable cannot plug straight into it.
Full KEF LSX II LT review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 100w RMS Per Speaker |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) |
| Bluetooth | Yes |
| Coaxial Input | No |
| Dimensions | 9.5”H x 6.1”W x 7.1”D (241.3 x 154.9 x 180.3 mm) |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter |
| EQ | No |
| Frequency Response | 54Hz - 28kHz (±3dB) (Manufacturer specified) |
| HDMI Input | Yes |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth |
| Optical Input | Yes |
| Outputs | RCA Subwoofer |
| RCA Input | No |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.81 |
| Spinorama Preference Score with Perfect Sub | 7.03 |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | Yes |
| Weight | 15 lbs (6.8 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner: Transform Your Sound System with the KEF LSX II LT Speaker More from Erin’s Audio Corner →
- Erin’s Audio Corner Website: KEF LSX II LT
- Erin’s Audio Corner Measurements (spinorama.org)
- Jasper Tech: Best Desktop Computer Speakers for Every Budget – 2026 More from Jasper Tech →
- Jasper Tech: Best Bookshelf Speakers For TV & Gaming - 2025
- Jasper Tech: Best Powered Bookshelf Speakers for Every Budget - 2025
- Head-to-Head Comparisons
Airpulse A100: $999.99 per pair Amazon B&H Photo Video eBay
Same family: the Airpulse A60 (smaller bookshelf, estimated 3.8/5), the Airpulse A80 (smaller bookshelf, ranked lower, estimated 3.9/5) and the Airpulse A200T (larger bookshelf, ranked lower, estimated 4/5).
Pros: ASR’s Klippel data gives a 2.9dB midrange span and scores of 4.56 standalone and 7.08 with an ideal subwoofer. The ribbon tweeter and five-inch woofer provide a distinctive compact powered system, with remote control and a subwoofer output simplifying everyday use. Measured bass extension of 63.0Hz (-3dB).
Cons: Bass reaches -3dB around 63Hz, so lower notes need a subwoofer for full weight. Listening-window narrow-band deviation of 0.419 shows more local tonal variation than the leading monitors. Rear tone controls are less flexible than parametric EQ or room correction. Neither the ribbon tweeter nor a directivity-index summary establishes uniquely wide or perfectly controlled dispersion. The remote cannot reach the rear bass and treble knobs, and there is no app EQ.
Full Airpulse A100 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 100W total (40W+40W woofer, 10W+10W tweeter) |
| App | None (physical bass/treble knobs, IR remote) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 53.2Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 63.0Hz (measured, spinorama.org) |
| Bluetooth | Yes (SBC, aptX) |
| Bluetooth Codecs | SBC, aptX |
| Coaxial Input | Yes |
| Dimensions | 6.3” x 11.1” x 10” (160 x 283 x 255 mm) each |
| Drivers | Horn-loaded ribbon tweeter, 5” hard-anodized aluminum cone woofer |
| EQ | Yes, rear-panel bass/treble trim knobs |
| Frequency Response | 52Hz - 40kHz |
| HDMI Input | No |
| Inputs | RCA (aux), USB, optical, coaxial, Bluetooth aptX |
| Optical Input | Yes |
| RCA Input | Yes |
| Spinorama Preference Score | 4.56 |
| Spinorama Preference Score with Perfect Sub | 7.08 |
| TRS Input | No |
| USB Input | Yes |
| Weight | 24.3 lbs (11 kg) each |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons