Short answer: the Genelec 8331A for better sound quality, the KEF LS50 Wireless II for the lower price. The Genelec 8331A ranks #1 of 65 powered bookshelf speakers at $5750. The KEF LS50 Wireless II ranks #14 at $2999, $2751 cheaper.
What the Genelec 8331A offers: Erin’s Klippel measurements support its reference-monitor credentials: a 1.4dB response span from 300Hz to 5kHz, low listening-window and predicted-room irregularity, and preference scores of 5.91 standalone and 7.85 with an ideal subwoofer. The coaxial mid/tweeter and concealed woofers maintain coherent radiation as listening position changes. Bass reaches -3dB around 48Hz, and GLM adds level, delay and room-response calibration. Watch for: Expensive, with studio-oriented XLR connectivity rather than consumer streaming. The compact woofers still limit deep-bass output, and the review reports protection muting when pushed beyond its operating range. GLM calibration hardware is an additional purchase. Its excellent tonal score does not remove the need for a subwoofer or larger monitor at demanding levels.
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.
Buy the Genelec 8331A when sound quality outweighs the price for you, and the KEF LS50 Wireless II when the price outweighs sound quality instead.
Looking for alternatives? See the complete Powered Home rankings.
Specifications Side By Side
| Genelec 8331A | KEF LS50 Wireless II | |
|---|---|---|
| Price | $4,500 per pair | $2,999.00 per pair |
| Ranked | #1 of 65 in Medium Size Powered Bookshelf Speakers | #14 of 65 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 49Hz (measured, Erin's Audio Corner) | 51.3Hz (measured, spinorama.org) |
| Bass Extension (-10dB) | 39Hz (measured, Erin's Audio Corner) | 41.5Hz (measured, spinorama.org) |
| Sensitivity | Not applicable (active DSP loudspeaker) | - |
| Maximum SPL | 100dB at 3m before protection (measured, Erin's Audio Corner) | 108dB at 1m (manufacturer specified) |
| Amplifier Power | 72W LF + 36W MF + 36W HF | 280W (LF) + 100W (HF) per speaker, bi-amped |
| Drivers | Dual 130x65mm woofers; 90mm coaxial mid; 19mm tweeter | Uni-Q coincident array: 130mm aluminum woofer + 25mm MAT aluminum dome tweeter |
| Dimensions | 12"H x 7.4"W x 8.3"D (305 x 189 x 212 mm) | 12" x 7.9" x 12.2" (305 x 200 x 311 mm) each |
| Weight | 14.8 lbs (6.7kg) each | 44.3 lbs (20.1 kg) for the pair |
| Spinorama Preference Score | 5.91 | 4.52 |
| Spinorama Preference Score with Perfect Sub | 7.85 | 6.59 |
| Inputs | - | HDMI eARC, optical, digital coaxial, 3.5mm analog, USB-A (service), Ethernet |
| 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 |
| Frequency Response | - | 45Hz - 28kHz ±3dB |
| Subwoofer Output | - | Yes |
| Outputs | - | RCA subwoofer |
Related Speaker Comparisons
How Genelec 8331A compares with other leading options:
- Genelec 8331A vs Neumann KH120 MKII
- Genelec 8331A vs Genelec 8030C
- Genelec 8331A vs Neumann KH80 DSP
- Dynaudio LYD 5 vs Genelec 8331A
- Genelec 8331A vs Genelec 8330A
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
Genelec 8331A: $4,500 per pair B&H Photo Video eBay
Pros: Erin’s Klippel measurements support its reference-monitor credentials: a 1.4dB response span from 300Hz to 5kHz, low listening-window and predicted-room irregularity, and preference scores of 5.91 standalone and 7.85 with an ideal subwoofer. The coaxial mid/tweeter and concealed woofers maintain coherent radiation as listening position changes. Bass reaches -3dB around 48Hz, and GLM adds level, delay and room-response calibration. Measured bass extension of 49Hz (-3dB).
Cons: Expensive, with studio-oriented XLR connectivity rather than consumer streaming. The compact woofers still limit deep-bass output, and the review reports protection muting when pushed beyond its operating range. GLM calibration hardware is an additional purchase. Its excellent tonal score does not remove the need for a subwoofer or larger monitor at demanding levels.
Full Genelec 8331A review and specifications →
| Amplifier Power | 72W LF + 36W MF + 36W HF |
|---|---|
| Bass Extension (-10dB) | 39Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 49Hz (measured, Erin's Audio Corner) |
| Dimensions | 12"H x 7.4"W x 8.3"D (305 x 189 x 212 mm) |
| Drivers | Dual 130x65mm woofers; 90mm coaxial mid; 19mm tweeter |
| Maximum SPL | 100dB at 3m before protection (measured, Erin's Audio Corner) |
| Sensitivity | Not applicable (active DSP loudspeaker) |
| Spinorama Preference Score | 5.91 |
| Spinorama Preference Score with Perfect Sub | 7.85 |
| Weight | 14.8 lbs (6.7kg) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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
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