Short answer: the JBL 306P MKII, if you are buying new. The JBL 4329P measures as well as it (#71 vs #67 of 113 powered bookshelf speakers, 4.1/5 vs 4.1/5) but is discontinued, so only consider it used; the JBL 306P MKII is still sold new at $238.
The JBL 4329P is the deeper-bass pick. Measured -3dB extension of 32.2Hz provides deeper native bass than the smaller 4305P. Its bass reaches about 31Hz before falling 3dB, against 46.9Hz for the JBL 306P MKII. It keeps a wired aux input, which the JBL 306P MKII lacks. The catch: The measured 4.5dB response span from 300Hz to 5kHz includes a notable midrange dip, so it is not as neutral as its size and price might suggest.
What the JBL 306P MKII does well: A 6.94 ideal-subwoofer score and 46.9Hz measured -3dB extension make this a useful affordable nearfield monitor. Watch for: The 3.4dB response span from 300Hz to 5kHz is less even than the 308P MKII’s, with midrange resonances affecting neutrality.
Buy the JBL 306P MKII new; the JBL 4329P is no longer sold new, so it only makes sense as a used find.
Looking for alternatives? See the complete Powered Home rankings.
Specifications Side By Side
| JBL 4329P | JBL 306P MKII | |
|---|---|---|
| Price | $4,500 per pair Discontinued | $238 per pair |
| Ranked | #71 of 113 in Large Size Powered Bookshelf Speakers | #67 of 113 in Large Size Powered Bookshelf Speakers |
| Drivers | 8” midwoofer, 1” compression driver with JBL High-Definition Imaging horn | 6.5” woofer, 1” neodymium tweeter |
| Dimensions | 20.3”H x 12.6”W x 12.7”D | 16.1”H x 11.2”W x 12.9”D (408 x 285 x 328 mm) |
| Weight | 34.4 lbs (15.6 kg) (primary), 34.4 lbs (15.6 kg) (secondary) | 13.4 lbs (6.1 kg) each |
| Sensitivity | 102.2dB (measured at 0.3V/1m, Erin’s Audio Corner) | - |
| Bass Extension (-3dB) | 31Hz (measured, Erin’s Audio Corner) | 46.9Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 27Hz (measured, Erin’s Audio Corner) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Frequency Response | 30Hz - 20kHz (anechoic, manufacturer specified) | 39Hz - 24kHz (-10dB) (Manufacturer specified) |
| Inputs | USB, Optical, Bluetooth, Analog, 3.5mm, AirPlay 2 | XLR, 1/4” TRS |
| Bluetooth Codecs | SBC, aptX Adaptive | - |
| Woofer Cabinet | ported | - |
| Spinorama Preference Score | 5.40 | 5.06 |
| Spinorama Preference Score with Perfect Sub | 6.72 | 6.94 |
| XLR Input | No | Yes |
| RCA Input | No | No |
| TRS Input | No | Yes |
| Optical Input | Yes | No |
| Coaxial Input | No | No |
| USB Input | Yes | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | Yes | No |
| Amplifier Power | 300W RMS per speaker (600W total system power) | 112W total |
| Bluetooth | Yes | No |
| Bluetooth Version | 5.3 | - |
| App | - | No |
| EQ | - | No |
| DSP | - | No |
Related Speaker Comparisons
How JBL 306P MKII compares with other leading options:
- Genelec 8361A vs JBL 306P MKII
- JBL 306P MKII vs Genelec 8341A
- JBL 306P MKII vs Adam Audio S2V
- Neumann KH 310 A vs JBL 306P MKII
- JBL 308P MKII vs JBL 306P MKII
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 4329P: $4,500 per pair Discontinued eBay
Pros: Measured -3dB extension of 32.2Hz provides deeper native bass than the smaller 4305P. Integrated amplification and streaming make it convenient for a full-range living-room system, and its larger format is useful when scale matters. Measured bass extension of 31Hz (-3dB), with a measured sensitivity of 102.2dB.
Cons: The measured 4.5dB response span from 300Hz to 5kHz includes a notable midrange dip, so it is not as neutral as its size and price might suggest. Its 6.72 ideal-subwoofer score trails the 4305P. There is no HDMI connection for the simplest TV hookup. Discontinued.
Full JBL 4329P review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 300W RMS per speaker (600W total system power) |
| Aux Input | Yes |
| Bass Extension (-10dB) | 27Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-3dB) | 31Hz (measured, Erin’s Audio Corner) |
| Bluetooth | Yes |
| Bluetooth Codecs | SBC, aptX Adaptive |
| Bluetooth Version | 5.3 |
| Coaxial Input | No |
| Dimensions | 20.3”H x 12.6”W x 12.7”D |
| Drivers | 8” midwoofer, 1” compression driver with JBL High-Definition Imaging horn |
| Frequency Response | 30Hz - 20kHz (anechoic, manufacturer specified) |
| HDMI Input | No |
| Inputs | USB, Optical, Bluetooth, Analog, 3.5mm, AirPlay 2 |
| Optical Input | Yes |
| RCA Input | No |
| Sensitivity | 102.2dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Spinorama Preference Score | 5.40 |
| Spinorama Preference Score with Perfect Sub | 6.72 |
| TRS Input | No |
| USB Input | Yes |
| Weight | 34.4 lbs (15.6 kg) (primary), 34.4 lbs (15.6 kg) (secondary) |
| Woofer Cabinet | ported |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
JBL 306P MKII: $238 per pair B&H Photo Video eBay
Same family: the JBL 305P MKII (smaller bookshelf, rated 4.3/5) and the JBL 308P MKII (larger bookshelf, ranked higher, rated 4.4/5).
Pros: A 6.94 ideal-subwoofer score and 46.9Hz measured -3dB extension make this a useful affordable nearfield monitor. The waveguide supports broad horizontal listening coverage, and basic boundary controls help with setup. Measured bass extension of 46.9Hz (-3dB).
Cons: The 3.4dB response span from 300Hz to 5kHz is less even than the 308P MKII’s, with midrange resonances affecting neutrality. Hiss can matter at a quiet desk, while bass distortion limits demanding playback. A subwoofer improves bandwidth but does not remove the midrange irregularities. A narrow dip around 1.6kHz shows in the on-axis and listening-window curves.
Full JBL 306P MKII review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 112W total |
| App | No |
| Aux Input | No |
| Bass Extension (-10dB) | 38.6Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
| Bass Extension (-3dB) | 46.9Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Coaxial Input | No |
| DSP | No |
| Dimensions | 16.1”H x 11.2”W x 12.9”D (408 x 285 x 328 mm) |
| Drivers | 6.5” woofer, 1” neodymium tweeter |
| EQ | No |
| Frequency Response | 39Hz - 24kHz (-10dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR, 1/4” TRS |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 5.06 |
| Spinorama Preference Score with Perfect Sub | 6.94 |
| TRS Input | Yes |
| USB Input | No |
| Weight | 13.4 lbs (6.1 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons