Short answer: the Sigberg Audio SBS Gen 2 for better sound quality, the KRK Classic 5 for the lower price. The Sigberg Audio SBS Gen 2 ranks #24 of 64 powered bookshelf speakers at $18043.20. The KRK Classic 5 ranks #30 at $280, $17763.20 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 Sigberg Audio SBS Gen 2 offers: The best-measuring of Sigberg’s three active systems, with a 6.74 Spinorama preference score with a perfect subwoofer versus 6.26 for the SBS.1 and 5.91 for the Manta. This is the appropriate apples-to-apples comparison because all three are designed for use with companion subwoofers. Unlike the other two measurements, the SBS Gen 2 data includes its subwoofer and verifies 24Hz bass extension. Its updated asymmetric 1st/3rd-order linear-phase crossover also delivers the best on-axis linearity and in-room and sound-power smoothness of the three. Active 3-channel Hypex nCore Class D amplification (350W per speaker) includes a 9-band parametric EQ. Watch for: Slightly wider directivity variation than the Manta (spinorama directivity index standard deviation 3.27 versus 2.50), though broadly comparable to the SBS.1’s 3.19. Sold only as a complete speaker-and-subwoofer system with pricing well into flagship territory. Built to order with a lead time of several months.
Buy the KRK Classic 5 if the price matters more than sound quality. Buy the Sigberg Audio SBS Gen 2 if sound quality matters more than the price.
Specifications Side By Side
| KRK Classic 5 | Sigberg Audio SBS Gen 2 | |
|---|---|---|
| Price | $280 | $18,043.20 for the full system (2 speakers + 2 dedicated subwoofers, built to order) |
| Ranked | #30 of 64 in Medium Size Powered Bookshelf Speakers | #24 of 64 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 60.1Hz (Spinorama/Audio Science Review) | 24Hz (measured, spinorama.org, with companion subwoofer) |
| 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) | 16.1"H x 7.5"W x 9.1"D (410 x 190 x 230 mm) |
| Frequency Response | 56Hz-30KHz (+-3dB) (Manufacturer specified) | - |
| Inputs | RCA, TRS, XLR | XLR, RCA, Optical, Coaxial/SPDIF, AES |
| Weight | 12.9 lbs / 5.87 kg | 20.9 lbs / 9.5 kg each |
| Drivers | 5" (127mm) woofer | 5.5" midbass, 5.5" coaxial mid/tweeter with 1" silk dome |
| App | No | No |
| Bluetooth | No | No |
| EQ | Yes (Room adjustment) | Yes (9-band parametric, factory presets) |
| Output Power | 50w RMS Per Speaker | 350W per speaker |
| Enclosure | - | sealed |
| Max SPL | - | 116dB |
| DSP | - | Yes |
| Country | - | Norway |
| Measurement Source | - | Manufacturer |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Edifier S2000MKIII vs Reflector Audio Square Two
- Edifier S2000MKIII vs Genelec 8331A
- Edifier MR4 vs Genelec 8331A
- JBL 305P MKII vs Sigberg Audio SBS Gen 2
- Adam Audio T5V vs Sigberg Audio SBS Gen 2
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.
As an eBay Partner, we may be compensated if you make a purchase.
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 |
- Links
- Reviews, Comparisons and Sound Samples
- Audio Science Review Measurements More from Audio Science Review →
- DSAUDIO.review: DSAUDIO.review Edifier S1000MKII vs Edifier S2000MKIII sound.DEMO More from DSAUDIOreview →
- DSAUDIO.review: Edifier S2000MKIII vs Edifier S3000PRO Sound & Frequency Response Comparison
- DSAUDIO.review: DSAUDIO.review Focal Alpha 50 EVO vs KRK Classic 5 CL5G3 sound.DEMO
- DSAUDIO.review: DSAUDIO.review JBL 305P MKII vs KRK Classic 5 CL5G3 sound.DEMO
- DSAUDIO.review: DSAUDIO.review KRK Classic 5 CL5G3 vs Yamaha HS5 sound.DEMO
- DSAUDIO.review: DSAUDIO.review KRK Classic 5 CL5G3 vs KRK Rokit 5 RP5G4 sound.DEMO
- Audio Science Review Measurements (spinorama.org)
- Reddit Search for KRK Classic 5 Review
- Head-to-Head Comparisons
- KRK Classic 5 vs Edifier MR4
- KRK Classic 5 vs Edifier S2000MKIII
- KRK Classic 5 vs Vanatoo Transparent One Encore Plus
- KRK Classic 5 vs Dayton Audio M4
- KRK Classic 5 vs KEF LSX II LT
- KRK Classic 5 vs Topping MA4
- KRK Classic 5 vs Focal Alpha 50 EVO
- KRK Classic 5 vs Reflector Audio Square Two
- See all 64 comparisons
Sigberg Audio SBS Gen 2: $18,043.20 for the full system (2 speakers + 2 dedicated subwoofers, built to order) Sigberg Audio eBay
Pros: The best-measuring of Sigberg’s three active systems, with a 6.74 Spinorama preference score with a perfect subwoofer versus 6.26 for the SBS.1 and 5.91 for the Manta. This is the appropriate apples-to-apples comparison because all three are designed for use with companion subwoofers. Unlike the other two measurements, the SBS Gen 2 data includes its subwoofer and verifies 24Hz bass extension. Its updated asymmetric 1st/3rd-order linear-phase crossover also delivers the best on-axis linearity and in-room and sound-power smoothness of the three. Active 3-channel Hypex nCore Class D amplification (350W per speaker) includes a 9-band parametric EQ.
Cons: Slightly wider directivity variation than the Manta (spinorama directivity index standard deviation 3.27 versus 2.50), though broadly comparable to the SBS.1’s 3.19. Sold only as a complete speaker-and-subwoofer system with pricing well into flagship territory. Built to order with a lead time of several months.
Full Sigberg Audio SBS Gen 2 review and specifications →
| App | No |
|---|---|
| Bass Extension (-3dB) | 24Hz (measured, spinorama.org, with companion subwoofer) |
| Bluetooth | No |
| Country | Norway |
| DSP | Yes |
| Dimensions | 16.1"H x 7.5"W x 9.1"D (410 x 190 x 230 mm) |
| Drivers | 5.5" midbass, 5.5" coaxial mid/tweeter with 1" silk dome |
| EQ | Yes (9-band parametric, factory presets) |
| Enclosure | sealed |
| Inputs | XLR, RCA, Optical, Coaxial/SPDIF, AES |
| Max SPL | 116dB |
| Measurement Source | Manufacturer |
| Output Power | 350W per speaker |
| Weight | 20.9 lbs / 9.5 kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sigberg Audio SBS Gen 2 vs KEF LSX II LT
- Sigberg Audio SBS Gen 2 vs IK Multimedia iLoud MTM MKII
- Sigberg Audio SBS Gen 2 vs Edifier S2000MKIII
- Sigberg Audio SBS Gen 2 vs Kali Audio IN-5
- Sigberg Audio SBS Gen 2 vs Yamaha HS5
- Sigberg Audio SBS Gen 2 vs Edifier R1280DB
- Sigberg Audio SBS Gen 2 vs Adam Audio T5V
- Sigberg Audio SBS Gen 2 vs JBL 305P MKII
- See all 10 comparisons