Short answer: the JBL M2 Master Reference Monitor. It ranks #1 of 31 powered bookshelf speakers by sound quality; the Kii THREE ranks #2.
What the JBL M2 Master Reference Monitor offers: Flagship quasi-active two-way with a 15-inch 2216Nd woofer and D2 compression driver crossing near 800Hz through a large Image Control Waveguide. Watch for: The required bi-amplification/DSP ecosystem is expensive and complex; Erin’s Crown I-Tech 5000HD had fans loud enough that he moved it to another room for measurements.
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.
Buy the JBL M2 Master Reference Monitor if sound quality matters more than the price. Buy the Kii THREE if the price matters more than sound quality.
Specifications Side By Side
| JBL M2 Master Reference Monitor | Kii THREE | |
|---|---|---|
| Price | Contact dealer | $14,000/pair |
| Ranked | #1 of 31 in Large Size Powered Bookshelf Speakers | #2 of 31 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 34Hz (measured, Erin’s Audio Corner) | 28Hz (measured, Erin’s Audio Corner) |
| Sensitivity | Not applicable (externally bi-amplified DSP system) | Not applicable (active DSP loudspeaker) |
| Drivers | 15" 2216Nd woofer; D2 compression driver in Image Control Waveguide | Four 6.5" woofers; 5" midrange; 1" waveguided tweeter |
| Crossover | 800Hz active DSP | - |
| Max SPL | 123dB manufacturer specified | - |
| Weight | 130 lb each | 42 lb each |
| Amplification | External two-channel amplification and JBL DSP tuning required | 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 |
| DSP | - | Yes; boundary, contour, phase-exact and low-latency modes |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- Dutch & Dutch 8C vs Genelec 8361A
- Dutch & Dutch 8C vs Neumann KH420
- Dutch & Dutch 8C vs Edifier R2850DB
- Kii THREE vs SHIVAUDYO Point Zero
- Kii THREE vs Dutch & Dutch 8C
The Two Speakers In Full
JBL M2 Master Reference Monitor: Contact dealer JBL Professional Dealer Locator
Pros: Flagship quasi-active two-way with a 15-inch 2216Nd woofer and D2 compression driver crossing near 800Hz through a large Image Control Waveguide. Erin measured F3 at 34Hz, less than 1% THD at 86 and 96dB, and only about 0.25dB compression by 102dB. Radiation stays broadly constant to roughly +/-60 degrees through 8-9kHz, producing excellent direct/reflected-sound agreement and enormous clean dynamic range. External DSP amplification permits precise factory crossover, phase and response correction.
Cons: The required bi-amplification/DSP ecosystem is expensive and complex; Erin’s Crown I-Tech 5000HD had fans loud enough that he moved it to another room for measurements. Midrange resonances remain visible despite the otherwise neutral response, and treble dispersion narrows above roughly 9kHz before beaming above 12kHz. Each 130-pound enclosure is physically imposing. This is an amplified system, so passive impedance and sensitivity figures are not applicable to the complete configured product.
Full JBL M2 Master Reference Monitor review and specifications →
| Amplification | External two-channel amplification and JBL DSP tuning required |
|---|---|
| Bass Extension (-3dB) | 34Hz (measured, Erin's Audio Corner) |
| Crossover | 800Hz active DSP |
| Drivers | 15" 2216Nd woofer; D2 compression driver in Image Control Waveguide |
| Max SPL | 123dB manufacturer specified |
| Sensitivity | Not applicable (externally bi-amplified DSP system) |
| Weight | 130 lb each |
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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 |
As an eBay Partner, we may be compensated if you make a purchase.
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons