Short answer: the Adam Audio S2V on measured sound quality, the JBL 4305P on price. The Adam Audio S2V ranks #16 of 113 powered bookshelf speakers, rated 4.6/5, at $3,399.98. The JBL 4305P ranks #40, rated 4.4/5, at $1,499.99, $1,899.99 cheaper.
The JBL 4305P is the deeper-bass choice. The measured 1.5dB response span from 300Hz to 5kHz supports even mids, with a 7.45 ideal-subwoofer score and 45.4Hz -3dB bass extension. Its bass reaches about 45Hz before falling 3dB, against 52.7Hz for the Adam Audio S2V. It keeps a wired aux input, which the Adam Audio S2V lacks. The catch: Crossover-region directivity changes mean the narrow on-axis span does not describe every listening angle.
The case for the Adam Audio S2V: A 7.98 ideal-subwoofer score and relatively even listening-window response support a strong role as a subwoofer-assisted studio monitor. The tradeoff: Measured -3dB extension is 52.7Hz, so the large cabinet does not automatically deliver the deepest bass here.
Buy the JBL 4305P when the price outweighs sound quality for you, and the Adam Audio S2V when sound quality outweighs the price instead.
Looking for alternatives? See the complete Powered Home rankings.
Specifications Side By Side
| JBL 4305P | Adam Audio S2V | |
|---|---|---|
| Price | $1,499.99 per pair | $3,399.98 per pair |
| Ranked | #40 of 113 in Large Size Powered Bookshelf Speakers | #16 of 113 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 45Hz (measured, Erin’s Audio Corner) | 52.7Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 40.5Hz (measured, Erin’s Audio Corner) | 41.2Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Maximum SPL | ~93dB at 2m in-room before limiting (measured, Erin’s Audio Corner) | - |
| Amplifier Power | 300W system: 125W LF + 25W HF per speaker | 350W total (300W woofer Class D, 50W tweeter Class A/B) |
| Drivers | 5.25-inch pulp woofer; 1-inch annular compression driver | 7” woofer, S-ART AMT tweeter |
| Dimensions | 13.2H x 8.3W x 8.8D inches | 13.6” x 8.7” x 13.3” (346 x 222 x 338 mm) (H x W x D) |
| Spinorama Preference Score | 5.44 | 5.84 |
| Spinorama Preference Score with Perfect Sub | 7.45 | 7.98 |
| Inputs | XLR/TRS combo, 3.5mm Aux, Optical, USB-B, Ethernet | XLR, AES/EBU |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | Yes | No |
| Optical Input | Yes | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | No | No |
| AES Input | No | Yes |
| Aux Input | Yes | No |
| Weight | Primary 14.6 lbs (6.6 kg), Secondary 14.1 lbs (6.4 kg) | 24.3 lbs (11.0 kg) |
| Bluetooth | Yes | No |
| Bluetooth Version | 5.1 | - |
| Frequency Response | 45Hz - 25kHz (-6dB) (Manufacturer specified) | 35Hz - 50kHz (Manufacturer specified) |
| App | - | Yes |
| EQ | - | No |
| DSP | - | Yes |
Related Speaker Comparisons
How Adam Audio S2V compares with other leading options:
- Genelec 8341A vs Adam Audio S2V
- LOGProfessional Alpha vs Adam Audio S2V
- Neumann KH 310 A vs Adam Audio S2V
- JBL 308P MKII vs Adam Audio S2V
- Yamaha HS8 vs Adam Audio S2V
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
JBL 4305P: $1,499.99 per pair Amazon JBL eBay
Pros: The measured 1.5dB response span from 300Hz to 5kHz supports even mids, with a 7.45 ideal-subwoofer score and 45.4Hz -3dB bass extension. Integrated consumer connectivity makes this a more convenient living-room system than many studio monitors. Measured bass extension of 45Hz (-3dB).
Cons: Crossover-region directivity changes mean the narrow on-axis span does not describe every listening angle. Limiting becomes relevant at high output, particularly with bass-heavy music. It suits near- to midfield listening better than the largest high-output systems here. Erin measured about 8dB lost near 50Hz at the highest drive level and reached roughly 93dB unweighted at 2m in-room.
Full JBL 4305P review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 300W system: 125W LF + 25W HF per speaker |
| Aux Input | Yes |
| Bass Extension (-10dB) | 40.5Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 45Hz (measured, Erin’s Audio Corner) |
| Bluetooth | Yes |
| Bluetooth Version | 5.1 |
| Coaxial Input | No |
| Dimensions | 13.2H x 8.3W x 8.8D inches |
| Drivers | 5.25-inch pulp woofer; 1-inch annular compression driver |
| Frequency Response | 45Hz - 25kHz (-6dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR/TRS combo, 3.5mm Aux, Optical, USB-B, Ethernet |
| Maximum SPL | ~93dB at 2m in-room before limiting (measured, Erin’s Audio Corner) |
| Optical Input | Yes |
| RCA Input | No |
| Spinorama Preference Score | 5.44 |
| Spinorama Preference Score with Perfect Sub | 7.45 |
| TRS Input | Yes |
| USB Input | Yes |
| Weight | Primary 14.6 lbs (6.6 kg), Secondary 14.1 lbs (6.4 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Adam Audio S2V: $3,399.98 per pair Amazon eBay
Same family: the ADAM Audio S3V (larger bookshelf, ranked lower, estimated 4.5/5), the ADAM Audio S3H (larger bookshelf, ranked lower, estimated 4.5/5), the ADAM Audio S5V (larger bookshelf, ranked lower, estimated 4.4/5) and the ADAM Audio S5H (larger bookshelf, ranked lower, estimated 4.4/5).
Pros: A 7.98 ideal-subwoofer score and relatively even listening-window response support a strong role as a subwoofer-assisted studio monitor. The review’s low-distortion findings add useful evidence beyond amplifier ratings, and onboard DSP permits tailored adjustment. The review measured distortion about 70dB below the signal at 1kHz. Measured bass extension of 52.7Hz (-3dB).
Cons: Measured -3dB extension is 52.7Hz, so the large cabinet does not automatically deliver the deepest bass here. The native balance rises toward the treble, with some lower-midrange unevenness. DSP can improve that balance, but an EQ-optimized result is not its unadjusted performance.
Full Adam Audio S2V review and specifications →
| AES Input | Yes |
|---|---|
| Amplifier Power | 350W total (300W woofer Class D, 50W tweeter Class A/B) |
| App | Yes |
| Aux Input | No |
| Bass Extension (-10dB) | 41.2Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 52.7Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Coaxial Input | No |
| DSP | Yes |
| Dimensions | 13.6” x 8.7” x 13.3” (346 x 222 x 338 mm) (H x W x D) |
| Drivers | 7” woofer, S-ART AMT tweeter |
| EQ | No |
| Frequency Response | 35Hz - 50kHz (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR, AES/EBU |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 5.84 |
| Spinorama Preference Score with Perfect Sub | 7.98 |
| TRS Input | No |
| USB Input | No |
| Weight | 24.3 lbs (11.0 kg) |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons