Short answer: the Genelec 8331A for better sound quality, the Genelec 8320A for the lower price. The Genelec 8331A ranks #1 of 64 powered bookshelf speakers at $5750. The Genelec 8320A ranks #9 at $850, $4900 cheaper.
What the Genelec 8320A offers: The Directivity Control Waveguide and die cast aluminum Minimum Diffraction Enclosure produce a listening window smoothness score of 0.53 and a low frequency alignment Q of just 0.227, the cleanest, least resonant bass rolloff of any speaker in this whole batch. It network calibrates through Genelec’s GLM software for automatic room correction, and Intelligent Signal Sensing drops standby power to under 0.5W. Watch for: On axis deviation measures 0.169dB average, decent but not class leading next to the AsciLab and Audio Smile entries in this batch. The compact 4.1 inch woofer limits low frequency extension to a measured 67.4Hz at -3dB, so a subwoofer is needed for full range use. The GLM calibration kit that unlocks its room correction features is sold separately from the speaker price, and max SPL tops out around 100dB, modest next to Genelec’s larger 8000 series monitors.
What the Genelec 8331A offers: A true compact point source: the coaxial mid/tweeter and acoustically concealed opposed woofers produce exceptionally uniform directivity, superb nearfield summation and pinpoint imaging. Erin measured F3 at 49Hz and F10 at 39Hz, heard useful 40Hz in-room extension, and reached 100dB at 3m before protection activated. Response is highly neutral, distortion is low, and GLM provides calibrated level, delay and room-response correction. The die-cast aluminum waveguide/enclosure is both structurally inert and nearly diffraction-free. Watch for: At $4,500/pair it is expensive for a monitor whose protection circuit mutes near its limit rather than allowing short-term overload; larger rooms and bass-heavy playback still benefit from a subwoofer. GLM calibration requires separate network hardware, and connectivity is studio-centric—analog/AES XLR with no consumer streaming. The compact dual racetrack woofers cannot match larger Genelec Ones for deep-bass headroom, and passive sensitivity is not applicable because all filtering and amplification are internal.
Buy the Genelec 8320A if the price matters more than sound quality. Buy the Genelec 8331A if sound quality matters more than the price.
Specifications Side By Side
| Genelec 8320A | Genelec 8331A | |
|---|---|---|
| Price | $850 each | $5750 |
| Ranked | #9 of 64 in Medium Size Powered Bookshelf Speakers | #1 of 64 in Medium Size Powered Bookshelf Speakers |
| Enclosure | ported | - |
| Drivers | 0.75" metal dome tweeter, 4.1" cone woofer | Dual 130x65mm woofers; 90mm coaxial mid; 19mm tweeter |
| Dimensions | 9.5"H x 5.9"W x 5.6"D (242 x 151 x 142 mm) (9.5 x 5.9 x 5.6 in) | 12"H x 7.4"W x 8.3"D (305 x 189 x 212 mm) |
| Weight | 7.1 lbs / 3.2 kg (7.1 lbs) each | 14.8 lbs / 6.7kg each |
| Power Output (Watts) | 100W total (50W woofer, 50W tweeter, Class D) | - |
| Frequency Response | 55Hz-23kHz -6dB | - |
| Bass Extension (-3dB) | 67.4Hz (measured, Audio Science Review) | 49Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 53.2Hz (measured, Audio Science Review) | 39Hz (measured, Erin’s Audio Corner) |
| Max SPL | Peak 107dB | - |
| Warranty | 2 years (5 with product registration) | - |
| Country | Finland | - |
| Sensitivity | - | Not applicable (active DSP loudspeaker) |
| Maximum Output | - | 100dB at 3m before protection (measured, Erin’s Audio Corner) |
| Amplification | - | 72W LF + 36W MF + 36W HF |
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Prices on this page were last checked August 25, 2026 at 6:19 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 8320A: $850 each Bhphotovideo eBay
Pros: The Directivity Control Waveguide and die cast aluminum Minimum Diffraction Enclosure produce a listening window smoothness score of 0.53 and a low frequency alignment Q of just 0.227, the cleanest, least resonant bass rolloff of any speaker in this whole batch. It network calibrates through Genelec’s GLM software for automatic room correction, and Intelligent Signal Sensing drops standby power to under 0.5W.
Cons: On axis deviation measures 0.169dB average, decent but not class leading next to the AsciLab and Audio Smile entries in this batch. The compact 4.1 inch woofer limits low frequency extension to a measured 67.4Hz at -3dB, so a subwoofer is needed for full range use. The GLM calibration kit that unlocks its room correction features is sold separately from the speaker price, and max SPL tops out around 100dB, modest next to Genelec’s larger 8000 series monitors.
Full Genelec 8320A review and specifications →
| Bass Extension (-10dB) | 53.2Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 67.4Hz (measured, Audio Science Review) |
| Country | Finland |
| Dimensions | 9.5"H x 5.9"W x 5.6"D (242 x 151 x 142 mm) (9.5 x 5.9 x 5.6 in) |
| Drivers | 0.75" metal dome tweeter, 4.1" cone woofer |
| Enclosure | ported |
| Frequency Response | 55Hz-23kHz -6dB |
| Max SPL | Peak 107dB |
| Power Output (Watts) | 100W total (50W woofer, 50W tweeter, Class D) |
| Warranty | 2 years (5 with product registration) |
| Weight | 7.1 lbs / 3.2 kg (7.1 lbs) each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Genelec 8331A: $5750 Bhphotovideo eBay
Pros: A true compact point source: the coaxial mid/tweeter and acoustically concealed opposed woofers produce exceptionally uniform directivity, superb nearfield summation and pinpoint imaging. Erin measured F3 at 49Hz and F10 at 39Hz, heard useful 40Hz in-room extension, and reached 100dB at 3m before protection activated. Response is highly neutral, distortion is low, and GLM provides calibrated level, delay and room-response correction. The die-cast aluminum waveguide/enclosure is both structurally inert and nearly diffraction-free.
Cons: At $4,500/pair it is expensive for a monitor whose protection circuit mutes near its limit rather than allowing short-term overload; larger rooms and bass-heavy playback still benefit from a subwoofer. GLM calibration requires separate network hardware, and connectivity is studio-centric—analog/AES XLR with no consumer streaming. The compact dual racetrack woofers cannot match larger Genelec Ones for deep-bass headroom, and passive sensitivity is not applicable because all filtering and amplification are internal.
Full Genelec 8331A review and specifications →
| Amplification | 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 Output | 100dB at 3m before protection (measured, Erin's Audio Corner) |
| Sensitivity | Not applicable (active DSP loudspeaker) |
| Weight | 14.8 lbs / 6.7kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons