Short answer: the Neumann KH420 for better sound quality, the Focal Solo6 ST6 for the lower price. The Neumann KH420 ranks #4 of 66 powered bookshelf speakers at $10500. The Focal Solo6 ST6 ranks #25 at $1499, $9001 cheaper.
What the Neumann KH420 offers: CEA2034 spinorama shows an extended, flat on-axis response that matches Neumann’s own published measurement to within 0.08dB at its one minor dip (around 60Hz), with excellent off-axis behavior. Predicted in-room response is smooth and rated “excellent” by the reviewer. Horizontal beamwidth of about ±55 degrees is very well controlled and stays consistent across frequency. Distortion is low at 86dB SPL/1m. Exceptionally high sustained output capability - the reviewer needed to “hold on for dear life” during extreme-level testing at 7 feet, with bass output described as making the entire house resonate. Reviewer’s overall verdict was “Great,” placing it on the recommended list and calling it a speaker “you could buy and forget about upgrading ever again.” Watch for: Horizontal beamwidth, while well controlled, is on the narrow side at about ±55 degrees. Vertical directivity is more limited than horizontal - the reviewer recommends staying within about ±30 degrees of the reference axis (just below the tweeter waveguide edge). Distortion rises noticeably in the bass region at 96dB SPL/1m, with an unusual 3rd-harmonic uptick appearing near 10kHz at that output level. At 106dB SPL/1m, the tweeter’s protection limiting engages and the clipping indicator activates - a real, measurable output ceiling despite the speaker’s otherwise very high capability. Very expensive.
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. 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. Watch for: 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.
Buy the Neumann KH420 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
| Neumann KH420 | Focal Solo6 ST6 | |
|---|---|---|
| Price | $10500 | $1,499.00 |
| Ranked | #4 of 66 in Large Size Powered Bookshelf Speakers | #25 of 66 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-10dB) | 24Hz (measured, Audio Science Review) | 38.1Hz (measured, spinorama.org) |
| Bass Extension (-3dB) | 32Hz (measured, Audio Science Review) | 46.9Hz (measured, spinorama.org) |
| Dimensions | 25.4"H x 13"W x 17.5"D (645.2 x 330.2 x 444.5 mm) | 24.6 x 33.4 x 29.5cm (9.7 x 13.1 x 11.6 in) each, 13kg (28.6 lb) each |
| Inputs | XLR | - |
| Weight | 77.2 lbs / 35 kg each | - |
| Drivers | 10" woofer, 4" dome midrange, 1" fabric dome tweeter | 1" Beryllium inverted-dome tweeter, 6.5" "W" composite sandwich-cone woofer |
| App | Yes (MA 1 alignment) | - |
| Bluetooth | No | - |
| DSP | No | - |
| EQ | Yes (Room response controls) | - |
| Frequency Response | 31Hz - 21kHz (±3dB) (Manufacturer specified) | - |
| Max SPL | 124dB @ 1m | - |
| Output Power | 555w Per Speaker | - |
| Maximum Output | - | 110dB peak at 1m |
| Amplification | - | 130W total, bi-amped (80W Class G LF + 50W Class AB HF) |
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- Genelec 8361A vs Klipsch The Sevens
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- Genelec 8361A vs Focal Solo6 ST6
- Klipsch The Nines vs Neumann KH420
Prices on this page were last checked August 25, 2026 at 6:19 AM 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
Neumann KH420: $10500 Bhphotovideo eBay
Pros: CEA2034 spinorama shows an extended, flat on-axis response that matches Neumann’s own published measurement to within 0.08dB at its one minor dip (around 60Hz), with excellent off-axis behavior. Predicted in-room response is smooth and rated “excellent” by the reviewer. Horizontal beamwidth of about ±55 degrees is very well controlled and stays consistent across frequency. Distortion is low at 86dB SPL/1m. Exceptionally high sustained output capability - the reviewer needed to “hold on for dear life” during extreme-level testing at 7 feet, with bass output described as making the entire house resonate. Reviewer’s overall verdict was “Great,” placing it on the recommended list and calling it a speaker “you could buy and forget about upgrading ever again.”
Cons: Horizontal beamwidth, while well controlled, is on the narrow side at about ±55 degrees. Vertical directivity is more limited than horizontal - the reviewer recommends staying within about ±30 degrees of the reference axis (just below the tweeter waveguide edge). Distortion rises noticeably in the bass region at 96dB SPL/1m, with an unusual 3rd-harmonic uptick appearing near 10kHz at that output level. At 106dB SPL/1m, the tweeter’s protection limiting engages and the clipping indicator activates - a real, measurable output ceiling despite the speaker’s otherwise very high capability. Very expensive.
Full Neumann KH420 review and specifications →
| App | Yes (MA 1 alignment) |
|---|---|
| Bass Extension (-10dB) | 24Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 32Hz (measured, Audio Science Review) |
| Bluetooth | No |
| DSP | No |
| Dimensions | 25.4"H x 13"W x 17.5"D (645.2 x 330.2 x 444.5 mm) |
| Drivers | 10" woofer, 4" dome midrange, 1" fabric dome tweeter |
| EQ | Yes (Room response controls) |
| Frequency Response | 31Hz - 21kHz (±3dB) (Manufacturer specified) |
| Inputs | XLR |
| Max SPL | 124dB @ 1m |
| Output Power | 555w Per Speaker |
| Weight | 77.2 lbs / 35 kg each |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Focal Solo6 ST6: $1,499.00 B&H Photo eBay
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 |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons