Genelec 8351B vs Neumann KH 150

Short answer: the Genelec 8351B for flatness, the Neumann KH 150 for genuine low-end extension. The 8351B’s CEA2034 spinorama is exceptionally flat on and off axis, but deep bass distortion rises at 96dB SPL/1m and the reviewer notes deep bass suffers below about 100Hz. The KH 150’s 6.5” woofer reaches a genuine 39.6Hz with a listening window smoothness of 0.69, though its 3.89 sound power directivity standard deviation is the batch’s widest.

What the Neumann KH 150 offers: 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. Set against that: 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.

Buy the Neumann KH 150. Both are rated the same for sound quality, and it costs $5,752 less than the Genelec 8351B.

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Specifications Side By Side

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How Genelec 8351B compares with other leading options:

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• Genelec 8351B vs Genelec 8361A
• Genelec 8351B vs Aalto Speakers Aalto 3 Active Pro
• Genelec 8351B vs Neumann KH 310 A
• Genelec 1032C vs Genelec 8351B

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The Two Speakers In Full

Genelec 8351B: $9150 per pair B&H Photo Video eBay

Pros: The vertical ASR measurement scores 7.75 with an ideal subwoofer and reaches 35.2Hz at -3dB. Coaxial midrange and treble help maintain consistent sound as the listening angle changes. Low measured distortion at ordinary listening levels and GLM calibration make it a strong precision-monitoring choice. Measured bass extension of 33Hz (-3dB).

Cons: Bass distortion increases at higher playback levels, so a subwoofer remains useful for demanding material. Upper-treble distortion in the test also cautions against assuming unlimited output. Calibration hardware adds to an already expensive system, and the quoted result is for the measured vertical orientation.

Full Genelec 8351B review and specifications →

AES Input	No
Amplifier Power	550w Per Speaker
App	Yes (GLM)
Aux Input	No
Bass Extension (-10dB)	28Hz (measured, Audio Science Review)
Bass Extension (-3dB)	33Hz (measured, Audio Science Review)
Bluetooth	No
Coaxial Input	No
DSP	Yes
Dimensions	17”H x 11.3”W x 10.9”D (431.8 x 287 x 276.9 mm)
Drivers	8.6” woofer, 5” coaxial with tweeter midrange, 0.75” (19mm) coaxial tweeter
EQ	Yes (via GLM software)
Frequency Response	32Hz - 40kHz (±1.5dB) (Manufacturer specified)
HDMI Input	No
Inputs	XLR
Maximum SPL	113dB @ 1m (manufacturer specified)
Optical Input	No
RCA Input	No
TRS Input	No
USB Input	No
Weight	31.1 lbs (14.1 kg) each
XLR Input	Yes

• Links
  • Official Genelec 8351B Product Page
• Reviews, Comparisons and Sound Samples
  • Audio Science Review Measurements More from Audio Science Review →
  • Audio Science Review Measurements (spinorama.org)
• Head-to-Head Comparisons
  • Genelec 8351B vs Neumann KH420
  • Genelec 8351B vs Genelec 8361A
  • Genelec 8351B vs Aalto Speakers Aalto 3 Active Pro
  • Genelec 8351B vs Neumann KH 310 A
  • Genelec 8351B vs Genelec 1032C
  • Genelec 8351B vs Genelec 8350A
  • Genelec 8351B vs HEDD Type 20 MK2
  • Genelec 8351B vs SHIVAUDYO Point Zero
  • See all 27 comparisons

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

Smaller models: the Neumann KH120 MKII (rated 4.7/5) and the Neumann KH80 DSP (rated 4.6/5).

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)
• Head-to-Head Comparisons
  • Neumann KH 150 vs Genelec 8361A
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  • Neumann KH 150 vs Mesanovic CDM65
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  • Neumann KH 150 vs Neumann KH 310 A
  • Neumann KH 150 vs HEDD Type 20 MK2
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  • See all 31 comparisons