Short answer: the Genelec 8331A for better sound quality, the KRK Classic 5 for the lower price. The Genelec 8331A ranks #1 of 60 powered bookshelf speakers at $5750. The KRK Classic 5 ranks #30 at $280, $5470 cheaper.
What the KRK Classic 5 offers: High-quality Klippel NFS data produces a 5.22 Spinorama preference score with a subwoofer, essentially level with the Edifier MR4. Bass reaches 60.1Hz at -3dB and 54.2Hz at -6dB, and the speaker responds especially well to EQ: Spinorama’s corrected score rises from 2.71 to 5.34 without a subwoofer and from 5.22 to 7.71 with one. Watch for: The unequalized response has a large 6.5dB frequency-deviation band, elevated splashy treble above 4kHz, crossover directivity error, and sharply narrowing tweeter dispersion. Distortion becomes extreme below 50Hz. Its raw 2.71 preference score is weak without a subwoofer, so EQ and careful toe-in are strongly recommended.
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 KRK Classic 5 if the price matters more than sound quality. Buy the Genelec 8331A if sound quality matters more than the price.
Specifications Side By Side
| KRK Classic 5 | Genelec 8331A | |
|---|---|---|
| Price | $280 | $5750 |
| Ranked | #30 of 60 in Medium Size Powered Bookshelf Speakers | #1 of 60 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 60.1Hz (Spinorama/Audio Science Review) | 49Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-6dB) | 54.2Hz (Spinorama/Audio Science Review) | - |
| Spinorama Preference Score | 2.71 without subwoofer; 5.22 with subwoofer | - |
| Dimensions | 9.7"H x 7.4"W x 11.2"D (246.4 x 188 x 284.5 mm) | 12"H x 7.4"W x 8.3"D (305 x 189 x 212 mm) |
| Frequency Response | 56Hz-30KHz (+-3dB) (Manufacturer specified) | - |
| Inputs | RCA, TRS, XLR | - |
| Weight | 12.9 lbs / 5.87 kg | 14.8 lbs / 6.7kg each |
| Drivers | 5" (127mm) woofer | Dual 130x65mm woofers; 90mm coaxial mid; 19mm tweeter |
| App | No | - |
| Bluetooth | No | - |
| EQ | Yes (Room adjustment) | - |
| Output Power | 50w RMS Per Speaker | - |
| Bass Extension (-10dB) | - | 39Hz (measured, Erin’s Audio Corner) |
| 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 24, 2026 at 6:53 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
KRK Classic 5: $280 Amazon eBay
Pros: High-quality Klippel NFS data produces a 5.22 Spinorama preference score with a subwoofer, essentially level with the Edifier MR4. Bass reaches 60.1Hz at -3dB and 54.2Hz at -6dB, and the speaker responds especially well to EQ: Spinorama’s corrected score rises from 2.71 to 5.34 without a subwoofer and from 5.22 to 7.71 with one.
Cons: The unequalized response has a large 6.5dB frequency-deviation band, elevated splashy treble above 4kHz, crossover directivity error, and sharply narrowing tweeter dispersion. Distortion becomes extreme below 50Hz. Its raw 2.71 preference score is weak without a subwoofer, so EQ and careful toe-in are strongly recommended.
Full KRK Classic 5 review and specifications →
| App | No |
|---|---|
| Bass Extension (-3dB) | 60.1Hz (Spinorama/Audio Science Review) |
| Bass Extension (-6dB) | 54.2Hz (Spinorama/Audio Science Review) |
| Bluetooth | No |
| Dimensions | 9.7"H x 7.4"W x 11.2"D (246.4 x 188 x 284.5 mm) |
| Drivers | 5" (127mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 56Hz-30KHz (+-3dB) (Manufacturer specified) |
| Inputs | RCA, TRS, XLR |
| Output Power | 50w RMS Per Speaker |
| Spinorama Preference Score | 2.71 without subwoofer; 5.22 with subwoofer |
| Weight | 12.9 lbs / 5.87 kg |
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- Audio Science Review Measurements (spinorama.org)
- Reddit Search for KRK Classic 5 Review
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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