Short answer: the JBL 305P MKII. It ranks #17 of 100 powered bookshelf speakers by sound quality, rated 4.3/5, at $289; the Sigberg Audio SBS Gen 2 ranks #23, rated 4.2/5, and costs $18,043.20, so there is not much of a tradeoff to weigh.
The case for the JBL 305P MKII: Erin’s Klippel data gives 5.38 standalone and 7.52 with an ideal subwoofer, with bass reaching -3dB around 51Hz. The tradeoff: The 3.3dB midrange span and rising response show it is not perfectly neutral.
The Sigberg Audio SBS Gen 2 is the more accurate, deeper-bass choice. The measured speaker-and-subwoofer system has a 1.7dB midrange response span and a 7.51 ideal-subwoofer preference score, supporting useful tonal accuracy above the bass region. Its measured preference score, a predictor of how neutral it sounds, is 6.56 against 5.38 for the JBL 305P MKII. Its bass reaches about 24Hz before falling 3dB, against 50Hz for the JBL 305P MKII. Watch for: The measured system explicitly includes a subwoofer: its 6.56 full-system score and bass extension must not be attributed to the bookshelf speaker alone.
Buy the JBL 305P MKII. It is rated higher for sound quality than the Sigberg Audio SBS Gen 2 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| JBL 305P MKII | Sigberg Audio SBS Gen 2 | |
|---|---|---|
| Price | $289.00 per pair | $18,043.20 for the full system (2 speakers + 2 dedicated subwoofers, built to order) |
| Ranked | #17 of 100 in Medium Size Powered Bookshelf Speakers | #23 of 100 in Medium Size Powered Bookshelf Speakers |
| Dimensions | 11.7”H x 7.3”W x 9.1”D (297.2 x 185.4 x 231.1 mm) | 16.1”H x 7.5”W x 9.1”D (410 x 190 x 230 mm) |
| Frequency Response | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) | 26Hz - 20kHz (±2.5dB, with subwoofers) (Manufacturer specified) |
| Bass Extension (-3dB) | 50Hz (measured, Erin’s Audio Corner) | 24Hz (measured, spinorama.org, with companion subwoofer) |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) | - |
| Inputs | XLR, TRS | XLR, RCA, Optical, Coaxial/SPDIF, AES |
| Weight | 10.4 lbs (4.7 kg) each | 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) |
| Amplifier Power | 81w Per Speaker | 350W per speaker |
| Sensitivity | 91.1dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Spinorama Preference Score | 5.38 | 6.56 |
| Spinorama Preference Score with Perfect Sub | 7.52 | 7.51 |
| XLR Input | Yes | Yes |
| RCA Input | No | Yes |
| TRS Input | Yes | No |
| Optical Input | No | Yes |
| Coaxial Input | No | Yes |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | Yes |
| Aux Input | No | No |
| Enclosure | - | sealed |
| DSP | - | Yes |
| Country | - | Norway |
| Measurement Source | - | Manufacturer |
| Maximum SPL | - | 116dB (manufacturer specified) |
Related Speaker Comparisons
More top alternatives to JBL 305P MKII:
- Genelec 8331A vs JBL 305P MKII
- JBL 305P MKII vs Neumann KH120 MKII
- Genelec 8030C vs JBL 305P MKII
- JBL 305P MKII vs Neumann KH80 DSP
- JBL 305P MKII vs Reflector Audio Square Two
Prices on this page were last checked October 9, 2026 at 8:01 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
JBL 305P MKII: $289.00 per pair Amazon eBay
Older model: the JBL LSR305 (ranked lower, rated 4.2/5).
Same family: the JBL 306P MKII (larger bookshelf, rated 4.1/5) and the JBL 308P MKII (larger bookshelf, rated 4.4/5).
Pros: Erin’s Klippel data gives 5.38 standalone and 7.52 with an ideal subwoofer, with bass reaching -3dB around 51Hz. Broad horizontal coverage and reasonably smooth reflected sound support stable imaging across a desk. The existing review reports effective limiting and little sustained thermal compression, making it a strong budget-monitor option rather than just a speaker with a promising frequency curve. Measured bass extension of 50Hz (-3dB), with a measured sensitivity of 91.1dB.
Cons: The 3.3dB midrange span and rising response show it is not perfectly neutral. A port-related feature around 1.6kHz and some excess treble can be audible; the review recommends the treble-trim switch. Vertical crossover interference makes ear height important. Amplifier hiss may matter in very quiet nearfield use, and rear-port placement needs room-boundary adjustment.
Full JBL 305P MKII review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 81w Per Speaker |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 43Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 50Hz (measured, Erin’s Audio Corner) |
| Bluetooth | No |
| Coaxial Input | No |
| Dimensions | 11.7”H x 7.3”W x 9.1”D (297.2 x 185.4 x 231.1 mm) |
| Drivers | 5” (127mm) woofer |
| EQ | Yes (Room adjustment) |
| Frequency Response | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR, TRS |
| Optical Input | No |
| RCA Input | No |
| Sensitivity | 91.1dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.38 |
| Spinorama Preference Score with Perfect Sub | 7.52 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 10.4 lbs (4.7 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Erin’s Audio Corner Review Measurements More from Erin’s Audio Corner →
- Audio Science Review Measurements More from Audio Science Review →
- Erin’s Audio Corner: LIVE! JBL 305P MkII Powered Studio Monitor Review
- DSAUDIO.review: DSAUDIO.review Focal Alpha 50 EVO vs JBL 305P MKII sound.DEMO More from DSAUDIOreview →
- DSAUDIO.review: JBL 305P MKII vs Yamaha HS5 6-Track Comparison
- DSAUDIO.review: DSAUDIO.review JBL 305P MKII vs KRK Classic 5 CL5G3 sound.DEMO
- DSAUDIO.review: JBL 305P MKII vs Adam Audio T5V 6-Track Comparison
- DSAUDIO.review: DSAUDIO.review Adam Audio A5X vs JBL 305P MKII sound.DEMO
- DSAUDIO.review: DSAUDIO.review Kali Audio LP-6 V2 (2nd Wave) vs JBL 305P MKII sound.DEMO
- DSAUDIO.review: DSAUDIO.review Edifier MR4 vs JBL 305P MKII sound.DEMO
- DSAUDIO.review: Kali Audio IN-5 vs JBL 305P MKII Sound & Frequency Response Comparison
- DSAUDIO.review: JBL 308P MKII vs JBL 305P MKII Sound & Frequency Response Comparison
- DSAUDIO.review: Neumann KH80 DSP vs JBL 305P MKII Sound & Frquency Response Comparison
- DSAUDIO.review: JBL 305P MKII vs PreSonus Eris E5 6-Track Comparison
- Erin’s Audio Corner Measurements (spinorama.org)
- Jasper Tech: Best Desktop Computer Speakers for Every Budget – 2026 More from Jasper Tech →
- Jasper Tech: Best Powered Bookshelf Speakers for Every Budget - 2025
- Jasper Tech: Are the iLoud Micro Monitor Pro the Best Studio Monitor Speakers for your Home Studio?
- Head-to-Head Comparisons
- JBL 305P MKII vs KEF LS50 Wireless II
- JBL 305P MKII vs Klipsch The Fives
- JBL 305P MKII vs Vanatoo Transparent One Encore Plus
- JBL 305P MKII vs Genelec 8020D
- JBL 305P MKII vs IK Multimedia iLoud MTM MKII
- JBL 305P MKII vs Topping MA4
- JBL 305P MKII vs HEDD Type 05 A-CORE
- JBL 305P MKII vs Devialet Phantom II 98 dB
- See all 66 comparisons
Sigberg Audio SBS Gen 2: $18,043.20 for the full system (2 speakers + 2 dedicated subwoofers, built to order) Sigberg Audio eBay
Older model: the Sigberg Audio SBS.1 (ranked lower, rated 4.1/5).
Pros: The measured speaker-and-subwoofer system has a 1.7dB midrange response span and a 7.51 ideal-subwoofer preference score, supporting useful tonal accuracy above the bass region. The measured system reaches -3dB around 34Hz. Onboard parametric EQ and dedicated amplification provide flexible integration for a complete high-performance setup. Measured bass extension of 24Hz (-3dB).
Cons: The measured system explicitly includes a subwoofer: its 6.56 full-system score and bass extension must not be attributed to the bookshelf speaker alone. It is not directly equivalent to the standalone-monitor tests around it. The complete system is expensive and occupies more space than the main speakers suggest; the score alone does not prove superior output or room performance.
Full Sigberg Audio SBS Gen 2 review and specifications →
| AES Input | Yes |
|---|---|
| Amplifier Power | 350W per speaker |
| App | No |
| Aux Input | No |
| Bass Extension (-3dB) | 24Hz (measured, spinorama.org, with companion subwoofer) |
| Bluetooth | No |
| Coaxial Input | Yes |
| 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 |
| Frequency Response | 26Hz - 20kHz (±2.5dB, with subwoofers) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR, RCA, Optical, Coaxial/SPDIF, AES |
| Maximum SPL | 116dB (manufacturer specified) |
| Measurement Source | Manufacturer |
| Optical Input | Yes |
| RCA Input | Yes |
| Spinorama Preference Score | 6.56 |
| Spinorama Preference Score with Perfect Sub | 7.51 |
| TRS Input | No |
| USB Input | No |
| Weight | 20.9 lbs (9.5 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Sigberg Audio SBS Gen 2 vs IK Multimedia iLoud MTM MKII
- Sigberg Audio SBS Gen 2 vs Kali Audio IN-5
- Sigberg Audio SBS Gen 2 vs KEF LSX II LT
- Sigberg Audio SBS Gen 2 vs Adam Audio T5V
- Sigberg Audio SBS Gen 2 vs Neumann KH80 DSP
- Sigberg Audio SBS Gen 2 vs Kali LP-UNF
- Sigberg Audio SBS Gen 2 vs Yamaha HS5
- Sigberg Audio SBS Gen 2 vs Edifier S2000MKIII
- See all 12 comparisons