Neumann KH 150 vs Focal Solo6 ST6

Short answer: the Neumann KH 150 for better sound quality, the Focal Solo6 ST6 for the lower price. The Neumann KH 150 ranks #14 of 48 powered bookshelf speakers at $3398. The Focal Solo6 ST6 ranks #23 at $1499, $1899 cheaper.

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. 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.

What the Focal Solo6 ST6 offers: Beryllium inverted-dome tweeter over a 6.5” ‘W’ composite sandwich-cone woofer - a low-mass, low-distortion driver combination rarely found below far pricier monitors. The catch: Bass alignment Q is on the higher side, which can correlate with a touch of extra bass fullness/looseness versus a more critically-damped alignment.

Buy the Neumann KH 150 if sound quality matters more than the price. Buy the Focal Solo6 ST6 if the price matters more than sound quality.

Specifications Side By Side

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The Two Speakers In Full

Neumann KH 150: $3,398/pair Bhphotovideo

Pros: 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. FIR based phase correction and 118.7dB max SPL give it real headroom for a compact two way, and the onboard DSP includes adjustable bass, low mid, and treble shelving plus optional MA 1 automatic room calibration.

Cons: 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. No Bluetooth or wireless input, it needs a balanced XLR or S/PDIF source. At 8kg (17.6 lbs) per cabinet plus an external power brick it needs a proper stand rather than a bookshelf. Its measured preference score trails Neumann’s own larger KH 310A and KH 420 monitors, so buyers chasing the deepest bass in the KH line should look further up the range.

Full Neumann KH 150 review and specifications →

Bass Extension (-10dB)	34.2Hz (measured, Audio Science Review)
Bass Extension (-3dB)	39.6Hz (measured, Audio Science Review)
Country	Germany
Crossover Points	1.7kHz
Dimensions	13.6"H x 8.9"W x 10.7"D (345 x 225 x 273 mm) (13.58 x 8.86 x 10.75 in)
Drivers	1" tweeter, 6.5" woofer
Enclosure	ported
Frequency Response	39Hz-20.4kHz +/-3dB
Max SPL	118.7dB @ 1m half space
Power Output (Watts)	245W total (145W woofer, 100W tweeter, 10% THD+N)
Warranty	2 years
Weight	17.6 lbs / 8.0 kg (17.6 lbs) each

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• Links
  • Neumann KH 150 Official Page
• Reviews, Comparisons and Sound Samples
  • Audio Science Review Measurements
  • Audio Science Review Measurements (spinorama.org)
  • Reddit Search for Neumann KH 150 Review
• Head-to-Head Comparisons
  • Neumann KH 150 vs Neumann KH 310 A
  • Neumann KH 150 vs JBL 4305P
  • Neumann KH 150 vs Kali Audio IN-8
  • Neumann KH 150 vs Focal Alpha 65 EVO
  • Neumann KH 150 vs Kali Audio LP-6 V2
  • Neumann KH 150 vs Genelec 8040B
  • Neumann KH 150 vs Genelec 8050B
  • Neumann KH 150 vs JBL 4329P
  • See all 15 comparisons

Focal Solo6 ST6: $1,499.00 B&H Photo Sweetwater

Pros: Beryllium inverted-dome tweeter over a 6.5” ‘W’ composite sandwich-cone woofer - a low-mass, low-distortion driver combination rarely found below far pricier monitors. Directivity control is the tightest of this entire batch (directivity_spdi_stddev 2.87), and the listening-window response is smooth (smoothness_listening_window 0.380). Bi-amped 130W total (80W Class G woofer + 50W Class AB tweeter), each driver on its own amplifier. ‘Focus Mode’ switches the cabinet to a single-driver full-range reference signature for a second mix-translation check without extra hardware. Bass reaches 46.9Hz at -3dB / 38.1Hz at -10dB, solid for a 6.5” driver.

Cons: Bass alignment Q (lfq 0.826) is on the higher side, which can correlate with a touch of extra bass fullness/looseness versus a more critically-damped alignment. XLR-only balanced input, no unbalanced/TRS or digital connectivity. No automatic DSP room correction - tuning is limited to fixed analog shelving/high-pass switches. At $1,499 each ($2,998/pair), it’s a meaningful step up from typical prosumer active monitors.

Full Focal Solo6 ST6 review and specifications →

Amplification	130W total, bi-amped (80W Class G LF + 50W Class AB HF)
Bass Extension (-10dB)	38.1Hz (measured, spinorama.org)
Bass Extension (-3dB)	46.9Hz (measured, spinorama.org)
Dimensions	24.6 x 33.4 x 29.5cm (9.7 x 13.1 x 11.6 in) each, 13kg (28.6 lb) each
Drivers	1" Beryllium inverted-dome tweeter, 6.5" "W" composite sandwich-cone woofer
Maximum Output	110dB peak at 1m

As an eBay Partner, we may be compensated if you make a purchase.

• Links
  • Official Focal Solo6 ST6 Product Page
• Reviews, Comparisons and Sound Samples
  • Audio Science Review Measurements (spinorama.org)
  • Reddit Search for Focal Solo6 ST6 Review
• Head-to-Head Comparisons
  • Focal Solo6 ST6 vs PSI Audio A21-M
  • Focal Solo6 ST6 vs JBL 708P
  • Focal Solo6 ST6 vs Kali Audio LP-8
  • Focal Solo6 ST6 vs JBL 4329P
  • Focal Solo6 ST6 vs Yamaha HS8
  • Focal Solo6 ST6 vs JBL 308P MKII
  • Focal Solo6 ST6 vs Kali Audio LP-6 V2
  • Focal Solo6 ST6 vs Genelec S360
  • See all 15 comparisons