Short answer: the KEF LSX II LT. It ranks #35 of 100 powered bookshelf speakers by sound quality (rated 4.0/5) at $549.99 and is still sold new; the Neumi BS5P ranks #50 (rated 3.8/5) and is discontinued, so it is only an option used. The Neumi BS5P’s replacement, the Neumi BS5P-ARC, is rated 3.8/5.
The KEF LSX II LT is the deeper-bass option. 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 90.8Hz for the Neumi BS5P. The catch: The 3.4dB midrange response span and treble-region dips keep it below more neutral monitors.
Why pick the Neumi BS5P: Erin’s retest with corrected tweeter polarity, updated internal EQ and plugged ports gives a much more neutral result: 4.83 standalone and 7.83 with an ideal subwoofer, with a 2.7dB midrange span. Watch for: That result is conditional on the tested firmware and port configuration, not a guarantee for an unknown stock or used pair.
Buy the KEF LSX II LT. It is rated higher for sound quality; the Neumi BS5P is no longer sold new.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| KEF LSX II LT | Neumi BS5P | |
|---|---|---|
| Price | $549.99 per pair | $150 per pair Discontinued |
| Ranked | #35 of 100 in Medium Size Powered Bookshelf Speakers | #50 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) | 10.6” x 7.2” x 8.5” (269 x 183 x 216 mm) (H x W x D) |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth | Bluetooth, optical, coaxial and RCA |
| Outputs | RCA Subwoofer | - |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter | 1” silk-dome tweeter; 5” fiberglass woofer |
| Weight | 15 lbs (6.8 kg) | - |
| App | No | - |
| Bluetooth | Yes | Yes |
| EQ | No | - |
| Amplifier Power | 100w RMS Per Speaker | 75W total |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 90.8Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | 56.1Hz (measured, Erin’s Audio Corner) |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Spinorama Preference Score | 4.81 | 4.83 |
| Spinorama Preference Score with Perfect Sub | 7.03 | 7.83 |
| 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 | No |
| HDMI Input | Yes | No |
| AES Input | No | No |
| Aux Input | No | No |
| Frequency Response | 54Hz - 28kHz (±3dB) (Manufacturer specified) | 50Hz - 20kHz (Typical in-room) (Manufacturer specified) |
| Bass Extension | - | Erin’s response shows usable midbass but limited deep-bass headroom |
Related Speaker Comparisons
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- KEF LSX II LT vs Reflector Audio Square Two
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
Neumi BS5P: $150 per pair Discontinued eBay
Newer model: the Neumi BS5P-ARC, ranked higher, rated 3.8/5.
Pros: Erin’s retest with corrected tweeter polarity, updated internal EQ and plugged ports gives a much more neutral result: 4.83 standalone and 7.83 with an ideal subwoofer, with a 2.7dB midrange span. The reviewer also found that configuration substantially better in listening. Its analog and digital inputs make it a flexible inexpensive system. Measured bass extension of 90.8Hz (-3dB).
Cons: That result is conditional on the tested firmware and port configuration, not a guarantee for an unknown stock or used pair. The first sample had reversed tweeter polarity, so its poor initial result should not be generalized to every unit either. Plugged-port bass reaches -3dB around 91Hz. Confirm configuration before expecting the improved balance; tonal scores do not remove output limits. Discontinued.
Full Neumi BS5P review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 75W total |
| Aux Input | No |
| Bass Extension | Erin’s response shows usable midbass but limited deep-bass headroom |
| Bass Extension (-10dB) | 56.1Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 90.8Hz (measured, Erin’s Audio Corner) |
| Bluetooth | Yes |
| Coaxial Input | Yes |
| Dimensions | 10.6” x 7.2” x 8.5” (269 x 183 x 216 mm) (H x W x D) |
| Drivers | 1” silk-dome tweeter; 5” fiberglass woofer |
| Frequency Response | 50Hz - 20kHz (Typical in-room) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | Bluetooth, optical, coaxial and RCA |
| Optical Input | Yes |
| RCA Input | Yes |
| Spinorama Preference Score | 4.83 |
| Spinorama Preference Score with Perfect Sub | 7.83 |
| TRS Input | No |
| USB Input | No |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons