Short answer: the KEF LSX II LT is the more sophisticated small-room system, while the Audioengine A5+ Classic is the simpler, potentially louder traditional powered pair. KEF’s coaxial driver keeps tonal balance unusually consistent across a roughly ±60° listening window.
That wide sweet spot makes the LSX II LT especially appealing for a desk, living room, or more than one listener. Its compact drivers do impose real limits: bass compression starts around 88 to 92dB at one metre and distortion rises sharply before it becomes a large-room speaker.
The A5+ Classic is reasonably flat apart from its 200 to 400Hz dip, but that trough can hollow out warmth in male vocals and instruments. Its 800 to 900Hz distortion peak also argues against pushing it hard.
Buy the KEF LSX II LT if wide, even dispersion and a refined nearfield or small-room experience are priorities.
Buy the Audioengine A5+ Classic if you prefer a conventional powered stereo pair and do not need KEF’s coaxial imaging advantages.
Want more options? Browse the full Powered Home rankings.
Specifications Side By Side
| KEF LSX II LT | Audioengine A5+ Classic | |
|---|---|---|
| Price | $479.99 per pair | $399.00 per pair |
| Ranked | #27 of 68 in Medium Size Powered Bookshelf Speakers | #28 of 68 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) | 10.9”H x 7.2”W x 9.7”D (276.2 x 182.6 x 247.6 mm) |
| Inputs | Wifi, USB-C, HDMI, Optical, Bluetooth | RCA, Aux |
| Outputs | RCA Subwoofer | RCA variable output (subwoofer) |
| Drivers | 115mm (4.5in.) magnesium/aluminium alloy cone woofer, 19mm (0.75in.) aluminium dome tweeter | 5” Kevlar woofer, 0.75” silk dome tweeter |
| Weight | 15 lbs (6.8 kg) | 15.4 lbs (7 kg) (left/powered), 9.7 lbs (4.4 kg) (right) |
| App | No | No |
| Bluetooth | Yes | No |
| EQ | No | No |
| Amplifier Power | 100w RMS Per Speaker | 50W RMS / 75W peak |
| Bass Extension (-3dB) | 55Hz (measured, Erin’s Audio Corner) | 68Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 46Hz (measured, Erin’s Audio Corner) | 50Hz (measured, Audio Science Review) |
| Sensitivity | 84dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Spinorama Preference Score | 4.81 | 4.59 |
| Spinorama Preference Score with Perfect Sub | 7.03 | 7.06 |
| Subwoofer Output | Yes | Yes |
| XLR Input | No | No |
| RCA Input | No | Yes |
| TRS Input | No | No |
| Optical Input | Yes | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | Yes | No |
| AES Input | No | No |
| Aux Input | No | Yes |
| Frequency Response | 54Hz - 28kHz (±3dB) (Manufacturer specified) | 50Hz - 22kHz (+/-1.5dB) (Manufacturer specified) |
| DSP | - | 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
KEF LSX II LT: $479.99 per pair Amazon eBay
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
Audioengine A5+ Classic: $399.00 per pair Amazon B&H Photo Video eBay
Pros: ASR’s A5+ Powered measurements give 4.59 standalone and 7.06 with an ideal subwoofer, with a 2.7dB midrange span. The analog powered pair is straightforward to use without an external amplifier. The measured result supports a more capable tonal balance than its former low position suggested. Measured bass extension of 68Hz (-3dB).
Cons: The measured -3dB point is around 69Hz, and the upper-bass recession can reduce body in voices and instruments. The existing review reports crossover-region directivity errors and a distortion feature around 800-900Hz. The score does not make it a reference monitor, and adding a subwoofer cannot correct those midrange and off-axis issues.
Full Audioengine A5+ Classic review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 50W RMS / 75W peak |
| App | No |
| Aux Input | Yes |
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 68Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Coaxial Input | No |
| DSP | No |
| Dimensions | 10.9”H x 7.2”W x 9.7”D (276.2 x 182.6 x 247.6 mm) |
| Drivers | 5” Kevlar woofer, 0.75” silk dome tweeter |
| EQ | No |
| Frequency Response | 50Hz - 22kHz (+/-1.5dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | RCA, Aux |
| Optical Input | No |
| Outputs | RCA variable output (subwoofer) |
| RCA Input | Yes |
| Spinorama Preference Score | 4.59 |
| Spinorama Preference Score with Perfect Sub | 7.06 |
| Subwoofer Output | Yes |
| TRS Input | No |
| USB Input | No |
| Weight | 15.4 lbs (7 kg) (left/powered), 9.7 lbs (4.4 kg) (right) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
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