Short answer: the Genelec 8331A for better sound quality, the KRK Classic 5 for the lower price. The Genelec 8331A ranks #1 of 100 powered bookshelf speakers, rated 4.8/5, at $5,750. The KRK Classic 5 ranks #72, rated 3.4/5, at $319.99, $5,430.01 cheaper.
The case for the KRK Classic 5: ASR’s Klippel data gives -3dB bass around 60Hz and a 5.99 preference score with an ideal subwoofer. The tradeoff: The native standalone score is 3.47 and the midrange span is a large 6.5dB.
The Genelec 8331A is the more accurate choice. 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 6.57 standalone and 8.51 with an ideal subwoofer. Its measured preference score, a predictor of how neutral it sounds, is 6.57 against 3.47 for the KRK Classic 5. Watch for: Expensive, with studio-oriented XLR connectivity rather than consumer streaming.
Buy the KRK Classic 5 if the price is the priority over sound quality, or the Genelec 8331A if sound quality is the priority over the price.
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Specifications Side By Side
| KRK Classic 5 | Genelec 8331A | |
|---|---|---|
| Price | $319.99 per pair | $5,750 per pair |
| Ranked | #72 of 100 in Medium Size Powered Bookshelf Speakers | #1 of 100 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 | 3.47 | 6.57 |
| 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) | 45Hz - 37kHz (-6dB) (Manufacturer specified) |
| Inputs | RCA, TRS, XLR | XLR, AES/EBU |
| 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 | No |
| EQ | Yes (Room adjustment) | - |
| Amplifier Power | 50w RMS Per Speaker | 72W LF + 36W MF + 36W HF |
| Spinorama Preference Score with Perfect Sub | 5.99 | 8.51 |
| XLR Input | Yes | Yes |
| RCA Input | Yes | No |
| TRS Input | Yes | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | Yes |
| Aux Input | No | No |
| Bass Extension (-10dB) | - | 39Hz (measured, Erin’s Audio Corner) |
| Maximum SPL | - | 100dB at 3m before protection (measured, Erin’s Audio Corner) |
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Prices on this page were last checked October 7, 2026 at 9:25 PM 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: $319.99 per pair Amazon eBay
Pros: ASR’s Klippel data gives -3dB bass around 60Hz and a 5.99 preference score with an ideal subwoofer. Broad tonal correction can improve it, so it may be useful to someone willing to measure and EQ a basic studio setup. Measured bass extension of 60.1Hz (-3dB).
Cons: The native standalone score is 3.47 and the midrange span is a large 6.5dB. Excess treble and crossover/directivity errors keep it from being neutral out of the box, while low-bass distortion limits loud playback. Modeled EQ scores are not stock performance and do not demonstrate corrected distortion or dispersion.
Full KRK Classic 5 review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 50w RMS Per Speaker |
| App | No |
| Aux Input | No |
| Bass Extension (-3dB) | 60.1Hz (Spinorama/Audio Science Review) |
| Bass Extension (-6dB) | 54.2Hz (Spinorama/Audio Science Review) |
| Bluetooth | No |
| Coaxial Input | 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) |
| HDMI Input | No |
| Inputs | RCA, TRS, XLR |
| Optical Input | No |
| RCA Input | Yes |
| Spinorama Preference Score | 3.47 |
| Spinorama Preference Score with Perfect Sub | 5.99 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 12.9 lbs (5.87 kg) |
| XLR Input | Yes |
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- Audio Science Review Measurements (spinorama.org)
- Head-to-Head Comparisons
Genelec 8331A: $5,750 per pair B&H Photo Video eBay
Same family: the Genelec 8341A (larger bookshelf, rated 4.8/5), the Genelec 8351B (larger bookshelf, rated 4.8/5), the Genelec 8361A (larger bookshelf, rated 4.8/5) and the Genelec 8381A (floorstanding, estimated 4.9/5).
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 6.57 standalone and 8.51 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 →
| AES Input | Yes |
|---|---|
| Amplifier Power | 72W LF + 36W MF + 36W HF |
| Aux Input | No |
| Bass Extension (-10dB) | 39Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 49Hz (measured, Erin’s Audio Corner) |
| Bluetooth | No |
| Coaxial Input | No |
| 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 |
| Frequency Response | 45Hz - 37kHz (-6dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR, AES/EBU |
| Maximum SPL | 100dB at 3m before protection (measured, Erin’s Audio Corner) |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 6.57 |
| Spinorama Preference Score with Perfect Sub | 8.51 |
| TRS Input | No |
| USB Input | No |
| Weight | 14.8 lbs (6.7kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons