Short answer: the Kii THREE. It ranks #3 of 119 powered bookshelf speakers by sound quality (rated 4.9/5) at $16,970 and is still sold new; the JBL 4329P ranks #73 (rated 4.1/5) and is discontinued, so it is only an option used.
The Kii THREE is the more accurate choice. Compact cardioid active speakers with extremely accurate sound and full range bass that walls barely color. Its measured preference score, a predictor of how neutral it sounds, is 7.70 against 5.40 for the JBL 4329P. The tradeoff: Deep-bass output has limits: demanding low-frequency material at high levels can trigger compression or audible distress.
Why pick the JBL 4329P: Discontinued powered horn speakers with deep bass, streaming, and Bluetooth, a convenient full range living room system. It keeps a wired aux input, which the Kii THREE lacks. The catch: The measured 4.5dB response span from 300Hz to 5kHz includes a notable midrange dip, so it is not as neutral as its size and price might suggest.
Buy the Kii THREE. It is rated higher for sound quality; the JBL 4329P is no longer sold new.
Looking for alternatives? See the complete Powered Home rankings.
Measured Differences
- Bass depth: the Kii THREE reaches 20.5 Hz (10 dB down) against 27 Hz for the JBL 4329P, about half an octave deeper. You hear more of the lowest bass notes and kick drums.
- Tonal accuracy above the bass: with a subwoofer taking the low end, the Kii THREE scores 8.3 against 6.7 for the JBL 4329P on the Spinorama preference scale. Its frequency response and off-axis sound are smoother, so voices and instruments sound closer to the recording.
Prices on this page were last checked November 14, 2026 at 6:17 PM 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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Specifications Side By Side
| Kii THREE | JBL 4329P | |
|---|---|---|
| Price | $16,970 per pair | $4,500 per pair Discontinued |
| Ranked | #3 of 119 in Large Size Powered Bookshelf Speakers | #73 of 119 in Large Size Powered Bookshelf Speakers |
| Bass Extension (-3dB) | 28Hz (measured, Erin’s Audio Corner) | 31Hz (measured, Erin’s Audio Corner) |
| Bass Extension (-10dB) | 20.5Hz (measured, Erin’s Audio Corner) | 27Hz (measured, Erin’s Audio Corner) |
| Drivers | Four 6.5” woofers; 5” midrange; 1” waveguided tweeter | 8” midwoofer, 1” compression driver with JBL High-Definition Imaging horn |
| Amplifier Power | 1,500W total per speaker; Six Ncore channels | 300W RMS per speaker (600W total system power) |
| Coverage | DSP-controlled cardioid above approximately 70-90Hz | - |
| Dimensions | 15.7”H x 7.9”W x 15.7”D | 20.3”H x 12.6”W x 12.7”D |
| Weight | 42.1 lbs (19.1 kg) each | 34.4 lbs (15.6 kg) (primary), 34.4 lbs (15.6 kg) (secondary) |
| DSP | Yes; boundary, contour, phase-exact and low-latency modes | - |
| Spinorama Preference Score | 7.70 | 5.40 |
| Spinorama Preference Score with Perfect Sub | 8.35 | 6.72 |
| Inputs | XLR (analog), XLR AES/EBU (digital), proprietary KiiLink digital multi-pin | USB, Optical, Bluetooth, Analog, 3.5mm, AirPlay 2 |
| XLR Input | Yes | No |
| RCA Input | No | No |
| TRS Input | No | No |
| Optical Input | No | Yes |
| Coaxial Input | No | No |
| USB Input | No | Yes |
| HDMI Input | No | No |
| AES Input | Yes | No |
| Aux Input | No | Yes |
| Bluetooth | No | Yes |
| Frequency Response | 20Hz - 20kHz (-6dB at 20Hz; ±0.5dB 100Hz-10kHz; ±1dB 10kHz-20kHz) (Manufacturer specified) | 30Hz - 20kHz (anechoic, manufacturer specified) |
| Sensitivity | - | 102.2dB (measured at 0.3V/1m, Erin’s Audio Corner) |
| Bluetooth Codecs | - | SBC, aptX Adaptive |
| Woofer Cabinet | - | ported |
| Bluetooth Version | - | 5.3 |
Where the Ratings Come From
- Kii THREE: Spinorama.org measurements and reviews by Erin’s Audio Corner.
- JBL 4329P: Spinorama.org measurements and reviews by Erin’s Audio Corner.
This comparison is generated from the ratings, specifications and measurements on each product’s own page, and it updates when that data changes. How we rank explains how each rating is decided.
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