Short answer: the KEF LS50 Wireless II for better sound quality, the M-Audio BX5 D3 for the lower price. The KEF LS50 Wireless II ranks #14 of 65 powered bookshelf speakers at $2999. The M-Audio BX5 D3 ranks #30 at $149.50, $2849.50 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 M-Audio BX5 D3 offers: The third-party measurements suggest scores of 3.34 standalone and 5.94 with an ideal subwoofer, with a 2.4dB midrange span. Balanced inputs and acoustic-space adjustment are useful for a basic studio setup. The measured -3dB estimate is about 64Hz. Watch for: The response slopes downward by about 0.65dB per octave, potentially softening treble relative to the midrange. There is no digital input or automatic calibration, and the preference estimate does not verify distortion or output headroom.
Buy the KEF LS50 Wireless II if sound quality is the priority over the price, or the M-Audio BX5 D3 if the price is the priority over sound quality.
Want more options? Browse the full Powered Home rankings.
Specifications Side By Side
| KEF LS50 Wireless II | M-Audio BX5 D3 | |
|---|---|---|
| Price | $2,999.00 per pair | $299 per pair |
| Ranked | #14 of 65 in Medium Size Powered Bookshelf Speakers | #30 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 | XLR and TRS |
| Drivers | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter | 1-inch silk tweeter, 5-inch Kevlar woofer |
| App | KEF Connect (placement EQ presets, source selection, firmware updates) | - |
| Bluetooth | Yes, 4.2 | - |
| EQ | Yes, fixed placement presets (desk/bookshelf/wall-mount) - no automatic room correction | - |
| Weight | 44.3 lbs (20.1 kg) for the pair | 12.3 lbs (5.6 kg) each |
| Amplifier Power | 280W (LF) + 100W (HF) per speaker, bi-amped | 100W each |
| Dimensions | 12" x 7.9" x 12.2" (305 x 200 x 311 mm) each | 10H x 6.9W x 7.8D in |
| Frequency Response | 45Hz - 28kHz ±3dB | 52Hz-35kHz |
| Maximum SPL | 108dB at 1m (manufacturer specified) | 110dB |
| Spinorama Preference Score | 4.52 | 3.34 |
| Spinorama Preference Score with Perfect Sub | 6.59 | 5.94 |
| Subwoofer Output | Yes | - |
| Outputs | RCA subwoofer | - |
| Enclosure | - | Active 2-way, rear-ported |
Related Speaker Comparisons
More top alternatives to KEF LS50 Wireless II:
- Genelec 8331A vs KEF LS50 Wireless II
- Neumann KH120 MKII vs KEF LS50 Wireless II
- Genelec 8030C vs KEF LS50 Wireless II
- Neumann KH80 DSP vs KEF LS50 Wireless II
- Dynaudio LYD 5 vs KEF LS50 Wireless II
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.
As an eBay Partner, we may be compensated if you make a purchase.
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
- Head-to-Head Comparisons
- KEF LS50 Wireless II vs JBL 305P MKII
- KEF LS50 Wireless II vs Vanatoo Transparent One Encore Plus
- KEF LS50 Wireless II vs IK Multimedia iLoud MTM MKII
- KEF LS50 Wireless II vs Klipsch The Fives
- KEF LS50 Wireless II vs Genelec 8020D
- KEF LS50 Wireless II vs Kali Audio SM-5
- KEF LS50 Wireless II vs Devialet Phantom II 98 dB
- KEF LS50 Wireless II vs Kali Audio IN-5
- See all 43 comparisons
M-Audio BX5 D3: $299 per pair Amazon eBay
Pros: The third-party measurements suggest scores of 3.34 standalone and 5.94 with an ideal subwoofer, with a 2.4dB midrange span. Balanced inputs and acoustic-space adjustment are useful for a basic studio setup. The measured -3dB estimate is about 64Hz.
Cons: The response slopes downward by about 0.65dB per octave, potentially softening treble relative to the midrange. There is no digital input or automatic calibration, and the preference estimate does not verify distortion or output headroom.
Full M-Audio BX5 D3 review and specifications →
| Amplifier Power | 100W each |
|---|---|
| Dimensions | 10H x 6.9W x 7.8D in |
| Drivers | 1-inch silk tweeter, 5-inch Kevlar woofer |
| Enclosure | Active 2-way, rear-ported |
| Frequency Response | 52Hz-35kHz |
| Inputs | XLR and TRS |
| Maximum SPL | 110dB |
| Spinorama Preference Score | 3.34 |
| Spinorama Preference Score with Perfect Sub | 5.94 |
| Weight | 12.3 lbs (5.6 kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- M-Audio BX5 D3 vs Kanto YU6
- M-Audio BX5 D3 vs Kali LP-UNF
- M-Audio BX5 D3 vs Adam Audio T5V
- M-Audio BX5 D3 vs Audioengine A5+ Classic
- M-Audio BX5 D3 vs Vanatoo Transparent Zero Plus
- M-Audio BX5 D3 vs KEF LSX II LT
- M-Audio BX5 D3 vs Airpulse A100
- M-Audio BX5 D3 vs Focal Alpha 50 EVO
- See all 37 comparisons