Short answer: the KEF LSX II LT. It ranks #35 of 100 powered bookshelf speakers by sound quality (rated 4.0/5) at $699.99 and is still sold new; the Kanto YU6 ranks #40 (rated 3.9/5) and is discontinued, so it is only an option used. The Kanto YU6’s replacement, the Kanto YU6 G2, is rated 3.9/5.
The KEF LSX II LT is the more accurate pick. The coincident driver provides useful consistency across listening positions, and the app offers placement and subwoofer adjustments. Its measured preference score, a predictor of how neutral it sounds, is 4.81 against 4.28 for the Kanto YU6. The catch: The 3.4dB midrange response span and treble-region dips keep it below more neutral monitors.
Why pick the Kanto YU6: ASR’s measurements give preference scores of 4.28 standalone and 6.89 with an ideal subwoofer, stronger than several smaller lifestyle pairs. The catch: Local response variation remains despite the mild overall tilt: the midrange span is 3.8dB and listening-window narrow-band deviation is 0.419.
Buy the KEF LSX II LT. It is rated higher for sound quality; the Kanto YU6 is no longer sold new.
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Specifications Side By Side
| KEF LSX II LT | Kanto YU6 | |
|---|---|---|
| Price | $699.99 per pair | $380.00 per pair Discontinued |
| Ranked | #35 of 100 in Medium Size Powered Bookshelf Speakers | #40 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) | 6.9W x 8.1D x 10.7H in each |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth | Bluetooth aptX, RCA phono preamp, 2x optical |
| Outputs | RCA Subwoofer | Subwoofer |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter | 1” silk dome tweeter, 5.25” Kevlar woofer |
| Weight | 15 lbs (6.8 kg) | 11.5 lbs (5.2 kg) (active), 8.6 lbs (3.9 kg) (passive) |
| App | No | - |
| Bluetooth | Yes | Yes |
| EQ | No | - |
| Amplifier Power | 100w RMS Per Speaker | 200W peak Class D (100W RMS total) |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | - |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | - |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Spinorama Preference Score | 4.81 | 4.28 |
| Spinorama Preference Score with Perfect Sub | 7.03 | 6.89 |
| Subwoofer Output | Yes | Yes |
| XLR Input | No | No |
| RCA Input | No | Yes |
| TRS Input | No | No |
| Optical Input | Yes | Yes |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | Yes | No |
| AES Input | No | No |
| Aux Input | No | No |
| Frequency Response | 54Hz - 28kHz (±3dB) (Manufacturer specified) | 50Hz - 20kHz (Manufacturer specified) |
| Enclosure | - | 2-way active, MDF cabinet |
| Bluetooth Codecs | - | SBC, aptX |
| Country | - | Canada (design) |
| Bluetooth Version | - | 4.0 |
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Prices on this page were last checked October 9, 2026 at 8:01 AM 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: $699.99 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
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Kanto YU6: $380.00 per pair Discontinued Amazon eBay
Newer model: the Kanto YU6 G2, estimated 3.9/5.
Same family: the Kanto YU2 (smaller bookshelf, estimated 3.4/5) and the Kanto YU4 (smaller bookshelf, rated 3.3/5).
Pros: ASR’s measurements give preference scores of 4.28 standalone and 6.89 with an ideal subwoofer, stronger than several smaller lifestyle pairs. Phono input, optical connections and remote control make it useful for a simple multi-source system. The overall response trend is close to level rather than strongly tilted.
Cons: Local response variation remains despite the mild overall tilt: the midrange span is 3.8dB and listening-window narrow-band deviation is 0.419. Bass reaches -3dB around 75Hz, so the preference model’s 58Hz LFX value should not be quoted as full-level bass extension. A subwoofer improves bandwidth but does not remove tonal irregularities. Discontinued.
Full Kanto YU6 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 200W peak Class D (100W RMS total) |
| Aux Input | No |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, aptX |
| Bluetooth Version | 4.0 |
| Coaxial Input | No |
| Country | Canada (design) |
| Dimensions | 6.9W x 8.1D x 10.7H in each |
| Drivers | 1” silk dome tweeter, 5.25” Kevlar woofer |
| Enclosure | 2-way active, MDF cabinet |
| Frequency Response | 50Hz - 20kHz (Manufacturer specified) |
| HDMI Input | No |
| Inputs | Bluetooth aptX, RCA phono preamp, 2x optical |
| Optical Input | Yes |
| Outputs | Subwoofer |
| RCA Input | Yes |
| Spinorama Preference Score | 4.28 |
| Spinorama Preference Score with Perfect Sub | 6.89 |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | No |
| Weight | 11.5 lbs (5.2 kg) (active), 8.6 lbs (3.9 kg) (passive) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons