Short answer: the Kii THREE for better sound quality, the Buchardt A10 for the lower price. The Kii THREE ranks #2 of 31 powered bookshelf speakers at $14000. The Buchardt A10 ranks #17 at $4300, $9700 cheaper.
What the Kii THREE offers: A genuinely full-range active cardioid monitor. Watch for: The protection limiter becomes evident above approximately 96dB at 1m; bass-heavy material can overdrive the compact woofers with an audible plop even though many tracks exceed 100dB at a four-meter seat.
What the Buchardt A10 offers: A 6.5” Purifi extended-stroke midwoofer (ultra-low distortion) crosses to a 19mm aluminum dome tweeter on an aluminum waveguide, in a two-way sealed enclosure with dedicated 150W midwoofer and 50W tweeter amplification. Watch for: Because it’s a constant-directivity design with a rising on-axis treble response, pointing it straight at the listener sounds noticeably bright in-room; needs about 30° of toe-out (or a high-shelf EQ cut) to sound neutral.
Buy the Kii THREE if sound quality matters more than the price. Buy the Buchardt A10 if the price matters more than sound quality.
Specifications Side By Side
| Kii THREE | Buchardt A10 | |
|---|---|---|
| Price | $14,000/pair | $4300 |
| Ranked | #2 of 31 in Large Size Powered Bookshelf Speakers | #17 of 31 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 28Hz (measured, Erin’s Audio Corner) | 30Hz (measured, Erin’s Audio Corner) |
| Sensitivity | Not applicable (active DSP loudspeaker) | - |
| Drivers | Four 6.5" woofers; 5" midrange; 1" waveguided tweeter | 6.5" PURIFI Extended Stroke Driver with Ultra Low Distortion, Custom made with triple Voice Coil woofer, 19 mm / 0.74" Resonance Free Aluminum dome with CDC aluminum waveguide tweeter |
| Amplification | Six Ncore channels, 1,500W total per speaker | - |
| Radiation | DSP-controlled cardioid above approximately 70-90Hz | - |
| Dimensions | 15.7"H x 7.9"W x 15.7"D | 14.6"H x 7"W x 9.6"D (370.8 x 177.8 x 243.8 mm) |
| Weight | 42 lb each | 15 lbs / 6.8 kg each |
| DSP | Yes; boundary, contour, phase-exact and low-latency modes | No |
| Bass Extension (-10dB) | - | 21Hz (measured, Erin’s Audio Corner) |
| Inputs | - | XLR |
| Woofer Cabinet | - | sealed |
| App | - | No |
| Bluetooth | - | No |
| EQ | - | Yes (Room adjustment) |
| Output Power | - | 200w Per Speaker |
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- Kii THREE vs Buchardt A500
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The Two Speakers In Full
Kii THREE: $14,000/pair Vintage King
Pros: A genuinely full-range active cardioid monitor. Erin measured a 28Hz F3, and boundary gain in his room kept useful response close to 20Hz. Four side/rear 6.5-inch woofers use DSP delay and cancellation to suppress rearward radiation above roughly 70-90Hz, reducing front-wall and sidewall interaction while the 5-inch midrange and waveguided tweeter maintain exceptionally smooth directivity. Six Ncore amplifier channels provide 1,500W total per cabinet, phase-exact mode offers precise impulse behavior, and Erin found imaging, tonal neutrality and left/right symmetry outstanding.
Cons: The protection limiter becomes evident above approximately 96dB at 1m; bass-heavy material can overdrive the compact woofers with an audible plop even though many tracks exceed 100dB at a four-meter seat. The BXT modules are the appropriate but very expensive solution for more deep-bass headroom. Erin preferred the treble control at -2dB because broad radiation around 3-5kHz could sound sharp. Phase-exact operation adds latency, while low-latency mode trades away some low-frequency correction. System cost, proprietary connectivity and 42-pound cabinets also narrow its audience.
Full Kii THREE review and specifications →
| Amplification | Six Ncore channels, 1,500W total per speaker |
|---|---|
| Bass Extension (-3dB) | 28Hz (measured, Erin's Audio Corner) |
| DSP | Yes; boundary, contour, phase-exact and low-latency modes |
| Dimensions | 15.7"H x 7.9"W x 15.7"D |
| Drivers | Four 6.5" woofers; 5" midrange; 1" waveguided tweeter |
| Radiation | DSP-controlled cardioid above approximately 70-90Hz |
| Sensitivity | Not applicable (active DSP loudspeaker) |
| Weight | 42 lb each |
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Buchardt A10: $4300 Buchardtaudio
Pros: A 6.5” Purifi extended-stroke midwoofer (ultra-low distortion) crosses to a 19mm aluminum dome tweeter on an aluminum waveguide, in a two-way sealed enclosure with dedicated 150W midwoofer and 50W tweeter amplification. Nine DSP “Master Tunings,” each with a standard and “relaxed” (less bass-limited) variant, give 18 total sound signatures to try without external EQ. F3 of 30Hz and F10 of 21Hz - extends genuinely low for its size, reaching into the mid-20s Hz in-room with boundary gain, without needing a subwoofer at moderate listening levels. A true constant-directivity design: on- and off-axis response track closely aside from a treble rolloff off-axis, so EQ changes behave predictably instead of fighting a mismatched direct/reflected sound the way many speakers do. Distortion stays low, not crossing the reviewer’s 3% harmonic distortion threshold until 60-70Hz even at 96dB. Tight, focused imaging aided by DSP-driven pair matching between the two speakers.
Cons: Because it’s a constant-directivity design with a rising on-axis treble response, pointing it straight at the listener sounds noticeably bright in-room; needs about 30° of toe-out (or a high-shelf EQ cut) to sound neutral. Bass is DSP-limited at higher volumes to protect the drivers - low-end impact audibly tapers off starting around 75-80dB at 10 feet, so the deep bass that’s excellent at low-to-moderate volume thins out as you turn it up. Multitone distortion becomes an issue at the 96dB/1m target output, with about 2.5dB of compression bringing effective max output closer to 94dB/1m; a dedicated low-frequency tuning or preamp-based excursion limiting is needed for loud, sustained listening. The vertical sweet spot is fairly tight at about ±15-20° above/below the tweeter/waveguide midpoint - outside that window there’s a suckout in the upper midrange where the woofer hands off to the tweeter. Adding a subwoofer crossed in at 80Hz meaningfully reduces both distortion and compression, so pairing one in is worthwhile if you want to play loud. Premium pricing for a speaker not intended for high-volume, full-range duty - best suited to small-to-medium rooms at moderate listening levels.
Full Buchardt A10 review and specifications →
| App | No |
|---|---|
| Bass Extension (-10dB) | 21Hz (measured, Erin's Audio Corner) |
| Bass Extension (-3dB) | 30Hz (measured, Erin's Audio Corner) |
| Bluetooth | No |
| DSP | No |
| Dimensions | 14.6"H x 7"W x 9.6"D (370.8 x 177.8 x 243.8 mm) |
| Drivers | 6.5" PURIFI Extended Stroke Driver with Ultra Low Distortion, Custom made with triple Voice Coil woofer, 19 mm / 0.74" Resonance Free Aluminum dome with CDC aluminum waveguide tweeter |
| EQ | Yes (Room adjustment) |
| Inputs | XLR |
| Output Power | 200w Per Speaker |
| Weight | 15 lbs / 6.8 kg each |
| Woofer Cabinet | sealed |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons