Neumann KH 150 vs JBL 4305P

Short answer: the Neumann KH 150 for headroom and consistency, the JBL 4305P for compact bass reach. The KH 150 delivers a 0.69 listening window smoothness score and 39.6Hz extension from its 6.5 inch woofer. The JBL 4305P measured a 45Hz F3 with solid 40-50Hz in-room for a compact 5.25-inch monitor, but its limiter becomes conspicuous around 96dB.

On the Neumann KH 150 side: Neumann’s Mathematically Modelled Dispersion waveguide produces a listening window smoothness score of 0.69 with a steadily narrowing directivity index through the treble, and the 6.5 inch woofer reaches a genuine 39.6Hz extension point. The catch: The sound power directivity index has the widest standard deviation of any speaker in this batch, 3.89, meaning off axis energy tracks the on axis response a little less consistently than the tightest speakers here as frequency rises.

The case for the JBL 4305P: Erin measured a 45Hz F3 and heard solid 40–50Hz in-room extension (excellent for a compact 5.25-inch active monitor). Set against that: The limiter becomes conspicuous around 96dB: Erin measured about 8dB lost near 50Hz at the highest drive and achieved roughly 93dB unweighted at 2m in-room, so this is a near/midfield system rather than a high-output theater speaker.

Buy the Neumann KH 150. It is rated higher for sound quality, and the $1,898.01 saving on the JBL 4305P is not enough to make up the difference.

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Specifications Side By Side

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The Two Speakers In Full

Neumann KH 150: $3,398 per pair B&H Photo Video eBay

Pros: An exceptionally tight 1.0dB response span from 300Hz to 5kHz supports neutral vocals and instruments. The measured ideal-subwoofer score is 8.38, with -3dB bass extension to 39.6Hz. DSP and optional MA 1 alignment offer useful control over room-related response errors. Measured bass extension of 39.6Hz (-3dB).

Cons: A two-way nearfield monitor cannot match the largest three-way systems for deep-bass output at distance. Keep the tweeter near ear height to avoid crossover-related changes off the vertical axis. MA 1 calibration requires additional equipment, and studio connections are less convenient than a consumer streaming system.

Full Neumann KH 150 review and specifications →

AES Input	No
Amplifier Power	245W total (145W woofer, 100W tweeter, 10% THD+N)
Aux Input	No
Bass Extension (-10dB)	34.2Hz (measured, Audio Science Review)
Bass Extension (-3dB)	39.6Hz (measured, Audio Science Review)
Bluetooth	No
Coaxial Input	Yes
Country	Germany
Crossover Frequency	1.7kHz
Dimensions	13.6”H x 8.9”W x 10.7”D (345 x 225 x 273 mm)
Drivers	1” tweeter, 6.5” woofer
Enclosure	ported
Frequency Response	39Hz-20.4kHz +/-3dB
HDMI Input	No
Inputs	XLR (balanced analog), RCA S/PDIF (digital)
Maximum SPL	118.7dB @ 1m half space (manufacturer specified)
Optical Input	No
RCA Input	Yes
Spinorama Preference Score	6.65
Spinorama Preference Score with Perfect Sub	8.38
TRS Input	No
USB Input	No
Warranty	2 years
Weight	17.6 lbs (8.0 kg) each
XLR Input	Yes

• Links
  • Neumann KH 150 Official Page
• Reviews, Comparisons and Sound Samples
  • Audio Science Review Measurements More from Audio Science Review →
  • Audio Science Review Measurements (spinorama.org)
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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, 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
  • Official JBL product page
• Reviews, Comparisons and Sound Samples
  • Erin’s Audio Corner video review More from Erin’s Audio Corner →
  • Erin’s Audio Corner written measurements
  • Erin’s Audio Corner Measurements (spinorama.org)
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