Short answer: the Neumann KH120 MKII for measured flatness; the JBL 305P MKII for value. The Neumann’s spinorama is about as flat as the reviewer has measured, with excellent directivity aside from a small blip around 2kHz. The JBL remains a fantastic value in studio monitors, with possible slight hissing from the amps at low levels.
On the JBL 305P MKII side: A fantastic value in studio monitors. The tradeoff: Possible slight hissing from the amps at low levels.
The case for the Neumann KH120 MKII: CEA2034 spinorama is about as flat as the reviewer has measured, with excellent directivity aside from a small blip around 2kHz. The tradeoff: A minor directivity blip appears around 2kHz.
Buy the JBL 305P MKII if the price is the priority over sound quality, or the Neumann KH120 MKII if sound quality is the priority over the price.
Still deciding? The full Powered Home rankings cover every ranked option.
Specifications Side By Side
| JBL 305P MKII | Neumann KH120 MKII | |
|---|---|---|
| Price | $299.00 per pair | $2000 per pair |
| Ranked | #13 of 65 in Medium Size Powered Bookshelf Speakers | #2 of 65 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) | 11.3"H x 7.2"W x 8.9"D (287 x 182.9 x 226.1 mm) |
| Frequency Response | 49 Hz - 20 kHz (+-3 dB) (Manufacturer specified) | 44Hz - 21kHz (±3dB) (Manufacturer specified) |
| Bass Extension (-3dB) | 50Hz (measured, Erin's Audio Corner) | 46Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 43Hz (measured, Erin's Audio Corner) | 36Hz (measured, Audio Science Review) |
| Inputs | XLR, TRS | XLR |
| Weight | 10.4 lbs (4.7 kg) each | 14.6 lbs (6.6 kg) each |
| Drivers | 5" (127mm) woofer | 5.25" woofer, 1" titanium fabric dome tweeter |
| App | No | Yes (MA 1 alignment) |
| Bluetooth | No | No |
| EQ | Yes (Room adjustment) | Yes (via DSP) |
| Amplifier Power | 81w Per Speaker | 245W (145W woofer + 100W tweeter) |
| Sensitivity | 91.1dB (measured at 0.3V/1m, Erin's Audio Corner) | - |
| Spinorama Preference Score | 4.47 | 5.75 |
| Spinorama Preference Score with Perfect Sub | 6.61 | 7.70 |
| XLR Input | Yes | Yes |
| RCA Input | No | No |
| TRS Input | Yes | No |
| Optical Input | No | No |
| Coaxial Input | No | No |
| USB Input | No | No |
| HDMI Input | No | No |
| AES Input | No | No |
| Aux Input | No | No |
| DSP | - | Yes |
| Maximum SPL | - | 116.8dB @ 1m (manufacturer specified) |
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Prices on this page were last checked September 23, 2026 at 11:24 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 305P MKII: $299.00 per pair Amazon eBay
Pros: Erin’s Klippel data gives 4.47 standalone and 6.61 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 | 4.47 |
| Spinorama Preference Score with Perfect Sub | 6.61 |
| 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
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- 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 →
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Neumann KH120 MKII: $2000 per pair B&H Photo Video eBay
Pros: ASR’s Klippel data shows exceptional neutrality: only a 1.5dB span from 300Hz to 5kHz and low listening-window narrow-band deviation of 0.208. Scores of 5.75 standalone and 7.70 with an ideal subwoofer place it among the strongest measured options here. Bass reaches -3dB around 45Hz. The review reports very low distortion at 86dB/1m and clean performance outside deep bass at 96dB. Measured bass extension of 46Hz (-3dB).
Cons: Vertical crossover interference makes listening height important even though horizontal dispersion is well controlled. A small directivity irregularity remains around 2kHz. Distortion increases below about 50Hz at high output; a subwoofer can extend the system and reduce low-frequency demands. High price, and a flat anechoic response still needs suitable placement in the room.
Full Neumann KH120 MKII review and specifications →
| AES Input | No |
|---|---|
| Amplifier Power | 245W (145W woofer + 100W tweeter) |
| App | Yes (MA 1 alignment) |
| Aux Input | No |
| Bass Extension (-10dB) | 36Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 46Hz (measured, Audio Science Review) |
| Bluetooth | No |
| Coaxial Input | No |
| DSP | Yes |
| Dimensions | 11.3"H x 7.2"W x 8.9"D (287 x 182.9 x 226.1 mm) |
| Drivers | 5.25" woofer, 1" titanium fabric dome tweeter |
| EQ | Yes (via DSP) |
| Frequency Response | 44Hz - 21kHz (±3dB) (Manufacturer specified) |
| HDMI Input | No |
| Inputs | XLR |
| Maximum SPL | 116.8dB @ 1m (manufacturer specified) |
| Optical Input | No |
| RCA Input | No |
| Spinorama Preference Score | 5.75 |
| Spinorama Preference Score with Perfect Sub | 7.70 |
| TRS Input | No |
| USB Input | No |
| Weight | 14.6 lbs (6.6 kg) each |
| XLR Input | Yes |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Neumann KH120 MKII vs Genelec 8030C
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- Neumann KH120 MKII vs Genelec 8330A
- Neumann KH120 MKII vs Genelec 8320A
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