Short answer: the KEF LS50 Wireless II on measured sound quality, the Audioengine HD6 on price. The KEF LS50 Wireless II ranks #14 of 65 powered bookshelf speakers at $2999. The Audioengine HD6 ranks #51 at $817.44, $2181.56 cheaper.
What the KEF LS50 Wireless II offers: Erin’s measurements give preference scores of 4.52 standalone and 6.59 with an ideal subwoofer, with a -3dB point around 51Hz. The coincident Uni-Q layout helps preserve tonal consistency across horizontal and vertical listening positions. Low listening-window narrow-band deviation of 0.308 supports relatively clean midrange reproduction. HDMI eARC and streaming functions make it a capable all-in-one stereo system. Watch for: The 3.0dB response span is good but not reference-leading, and dispersion still varies with frequency. Compact bass drivers limit deep-bass output. App placement adjustments are not the same as microphone-based automatic room correction. The price and primary/secondary architecture are practical trade-offs; neither driver geometry nor a single directivity statistic guarantees the best sound in every room.
What the Audioengine HD6 offers: Analog and optical inputs, RCA output and built-in amplification provide a convenient self-contained stereo setup. The cabinet and driver size can be practical for general music listening without assembling a separate amplifier system. Watch for: Listening impressions describe bass and treble emphasis with a recessed midrange, which may suit casual listening better than neutral monitoring.
Buy the KEF LS50 Wireless II if sound quality is the priority over the price, or the Audioengine HD6 if the price is the priority over sound quality.
If sound quality matters at all to you, skip the Audioengine HD6. It ranks near the bottom of the 65 powered bookshelf speakers, so look higher up the list instead.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| KEF LS50 Wireless II | Audioengine HD6 | |
|---|---|---|
| Price | $2,999.00 per pair | $817.44 per pair |
| Ranked | #14 of 65 in Medium Size Powered Bookshelf Speakers | #51 of 65 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-10dB) | 41.5Hz (measured, spinorama.org) | - |
| Bass Extension (-3dB) | 51.3Hz (measured, spinorama.org) | - |
| Inputs | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet | Bluetooth, Aux, RCA Input, Digital Optical |
| Drivers | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter | 5.5" (140mm) woofer |
| App | KEF Connect (placement EQ presets, source selection, firmware updates) | No |
| Bluetooth | Yes, 4.2 | Yes, 5.0 |
| EQ | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction | No |
| Weight | 44.3 lbs (20.1 kg) for the pair | 17.4 lbs (7.9 kg) |
| Amplifier Power | 280W (LF) + 100W (HF) per speaker, bi-amped | 50w RMS Per Speaker |
| Dimensions | 12" x 7.9" x 12.2" (305 x 200 x 311 mm) each | 11.7"H x 7.2"W x 10"D (298.4 x 184.1 x 254 mm) |
| Frequency Response | 45Hz - 28kHz ±3dB | 45Hz-40KHz (-3dB) (Manufacturer specified) |
| Maximum SPL | 108dB at 1m (manufacturer specified) | - |
| Spinorama Preference Score | 4.52 | - |
| Spinorama Preference Score with Perfect Sub | 6.59 | - |
| Subwoofer Output | Yes | Yes |
| Outputs | RCA subwoofer | RCA variable output (subwoofer) |
| Bluetooth Codecs | - | SBC, AAC, aptX, aptX HD |
Related Speaker Comparisons
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Prices on this page were last checked September 16, 2026 at 12:41 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 LS50 Wireless II: $2,999.00 per pair Amazon KEF Crutchfield eBay
Pros: Erin’s measurements give preference scores of 4.52 standalone and 6.59 with an ideal subwoofer, with a -3dB point around 51Hz. The coincident Uni-Q layout helps preserve tonal consistency across horizontal and vertical listening positions. Low listening-window narrow-band deviation of 0.308 supports relatively clean midrange reproduction. HDMI eARC and streaming functions make it a capable all-in-one stereo system. Measured bass extension of 51.3Hz (-3dB).
Cons: The 3.0dB response span is good but not reference-leading, and dispersion still varies with frequency. Compact bass drivers limit deep-bass output. App placement adjustments are not the same as microphone-based automatic room correction. The price and primary/secondary architecture are practical trade-offs; neither driver geometry nor a single directivity statistic guarantees the best sound in every room.
Full KEF LS50 Wireless II review and specifications →
| Amplifier Power | 280W (LF) + 100W (HF) per speaker, bi-amped |
|---|---|
| App | KEF Connect (placement EQ presets, source selection, firmware updates) |
| Bass Extension (-10dB) | 41.5Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 51.3Hz (measured, spinorama.org) |
| Bluetooth | Yes, 4.2 |
| Dimensions | 12" x 7.9" x 12.2" (305 x 200 x 311 mm) each |
| Drivers | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter |
| EQ | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction |
| Frequency Response | 45Hz - 28kHz ±3dB |
| Inputs | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet |
| Maximum SPL | 108dB at 1m (manufacturer specified) |
| Outputs | RCA subwoofer |
| Spinorama Preference Score | 4.52 |
| Spinorama Preference Score with Perfect Sub | 6.59 |
| Subwoofer Output | Yes |
| Weight | 44.3 lbs (20.1 kg) for the pair |
- Links
- Reviews, Comparisons and Sound Samples
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Audioengine HD6: $817.44 per pair Amazon eBay
Pros: Analog and optical inputs, RCA output and built-in amplification provide a convenient self-contained stereo setup. The cabinet and driver size can be practical for general music listening without assembling a separate amplifier system.
Cons: Listening impressions describe bass and treble emphasis with a recessed midrange, which may suit casual listening better than neutral monitoring.
Full Audioengine HD6 review and specifications →
| Amplifier Power | 50w RMS Per Speaker |
|---|---|
| App | No |
| Bluetooth | Yes, 5.0 |
| Bluetooth Codecs | SBC, AAC, aptX, aptX HD |
| Dimensions | 11.7"H x 7.2"W x 10"D (298.4 x 184.1 x 254 mm) |
| Drivers | 5.5" (140mm) woofer |
| EQ | No |
| Frequency Response | 45Hz-40KHz (-3dB) (Manufacturer specified) |
| Inputs | Bluetooth, Aux, RCA Input, Digital Optical |
| Outputs | RCA variable output (subwoofer) |
| Subwoofer Output | Yes |
| Weight | 17.4 lbs (7.9 kg) |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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