Short answer: the Neumann KH120 MKII for better sound quality, the Audioengine A5+ Classic for the lower price. The Neumann KH120 MKII ranks #2 of 60 powered bookshelf speakers at $2000. The Audioengine A5+ Classic ranks #38 at $399, $1601 cheaper.
What the Audioengine A5+ Classic offers: CEA2034 spinorama shows a reasonably flat response outside of the upper bass. Internal Class AB amplification (50W RMS, 75W peak) with a linear power supply drives a 5” Kevlar woofer and 0.75” tweeter. Watch for: A valley in the upper bass (200-400Hz) recesses that range, and a distortion peak shows up around 800-900Hz even at 86dB SPL. Off-axis response doesn’t track the on-axis curve well through the crossover, suggesting the waveguide isn’t fully optimized. Resonances appear at 900Hz and 4.4kHz.
What the Neumann KH120 MKII offers: CEA2034 spinorama is about as flat as the reviewer has measured, with excellent directivity aside from a small blip around 2kHz, and bass response that stays flat almost down to 50Hz. Predicted in-room response is superb despite not being strictly valid for a near-field monitor at this distance. Horizontal beamwidth of about ±50 degrees is nice and well controlled. Distortion at 86dB SPL/1m is exceptionally low. Even at 96dB SPL/1m - just 1dB before the clipping indicator engages - it stays very clean outside of deep bass. Watch for: A minor directivity blip appears around 2kHz. Vertical directivity narrows quickly above the reference axis, so the reviewer recommends staying right at it. Distortion rises substantially in the deep bass under 50Hz at higher output (96dB SPL/1m). Cumulative spectral decay (waterfall) shows a resonance in the upper midrange. High price.
Buy the Audioengine A5+ Classic if the price matters more than sound quality. Buy the Neumann KH120 MKII if sound quality matters more than the price.
Specifications Side By Side
| Audioengine A5+ Classic | Neumann KH120 MKII | |
|---|---|---|
| Price | $399.00 | $2000 |
| Ranked | #38 of 60 in Medium Size Powered Bookshelf Speakers | #2 of 60 in Medium Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 68Hz (measured, Audio Science Review) | 46Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) | 36Hz (measured, Audio Science Review) |
| Dimensions | 10.9"H x 7.2"W x 9.7"D (276.2 x 182.6 x 247.6 mm) | 11.3"H x 7.2"W x 8.9"D (287 x 182.9 x 226.1 mm) |
| Frequency Response | 50Hz - 22kHz (+/-1.5dB) (Manufacturer specified) | 44Hz - 21kHz (±3dB) (Manufacturer specified) |
| Weight | 15.4 lbs / 7 kg (left/powered), 9.7 lbs / 4.4 kg (right) | 14.6 lbs / 6.6 kg each |
| Drivers | 5" Kevlar woofer, 0.75" silk dome tweeter | 5.25" woofer, 1" titanium fabric dome tweeter |
| App | No | Yes (MA 1 alignment) |
| EQ | No | Yes (via DSP) |
| DSP | No | Yes |
| Output Power | 50W RMS / 75W peak | 245W (145W woofer + 100W tweeter) |
| Inputs | - | XLR |
| Bluetooth | - | No |
| Max SPL | - | 116.8dB @ 1m |
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Prices on this page were last checked August 24, 2026 at 6:53 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
Audioengine A5+ Classic: $399.00 Amazon Bhphotovideo eBay
Pros: CEA2034 spinorama shows a reasonably flat response outside of the upper bass. Internal Class AB amplification (50W RMS, 75W peak) with a linear power supply drives a 5” Kevlar woofer and 0.75” tweeter.
Cons: A valley in the upper bass (200-400Hz) recesses that range, and a distortion peak shows up around 800-900Hz even at 86dB SPL. Off-axis response doesn’t track the on-axis curve well through the crossover, suggesting the waveguide isn’t fully optimized. Resonances appear at 900Hz and 4.4kHz.
Full Audioengine A5+ Classic review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 50Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 68Hz (measured, Audio Science Review) |
| DSP | No |
| Dimensions | 10.9"H x 7.2"W x 9.7"D (276.2 x 182.6 x 247.6 mm) |
| Drivers | 5" Kevlar woofer, 0.75" silk dome tweeter |
| EQ | No |
| Frequency Response | 50Hz - 22kHz (+/-1.5dB) (Manufacturer specified) |
| Output Power | 50W RMS / 75W peak |
| Weight | 15.4 lbs / 7 kg (left/powered), 9.7 lbs / 4.4 kg (right) |
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Neumann KH120 MKII: $2000 Bhphotovideo eBay
Pros: CEA2034 spinorama is about as flat as the reviewer has measured, with excellent directivity aside from a small blip around 2kHz, and bass response that stays flat almost down to 50Hz. Predicted in-room response is superb despite not being strictly valid for a near-field monitor at this distance. Horizontal beamwidth of about ±50 degrees is nice and well controlled. Distortion at 86dB SPL/1m is exceptionally low. Even at 96dB SPL/1m - just 1dB before the clipping indicator engages - it stays very clean outside of deep bass.
Cons: A minor directivity blip appears around 2kHz. Vertical directivity narrows quickly above the reference axis, so the reviewer recommends staying right at it. Distortion rises substantially in the deep bass under 50Hz at higher output (96dB SPL/1m). Cumulative spectral decay (waterfall) shows a resonance in the upper midrange. High price.
Full Neumann KH120 MKII review and specifications →
| App | Yes (MA 1 alignment) |
|---|---|
| Bass Extension (-10dB) | 36Hz (measured, Audio Science Review) |
| Bass Extension (-3dB) | 46Hz (measured, Audio Science Review) |
| Bluetooth | 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) |
| Inputs | XLR |
| Max SPL | 116.8dB @ 1m |
| Output Power | 245W (145W woofer + 100W tweeter) |
| Weight | 14.6 lbs / 6.6 kg each |
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- Reviews, Comparisons and Sound Samples
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