Short answer: the JBL Studio 530. It ranks #30 of 63 bookshelf speakers by sound quality at $399; the KEF Q100 ranks #45 and costs $550, so there is not much of a tradeoff to weigh.
What the JBL Studio 530 offers: CEA2034 spinorama shows a fairly flat on-axis response. Predicted in-room response is very smooth aside from the high-frequency roll-off. Watch for: A peak around 1.4kHz is attributed to a tweeter resonance, and shows up as a distinct spike in harmonic distortion at that frequency along with a second resonance-driven bump around 2kHz.
The case for the KEF Q100: 5.25” Uni-Q coaxial driver keeps the tweeter and woofer point-source aligned for consistent imaging. 86dB sensitivity is reasonably easy to drive. The catch: CEA2034 spinorama shows broad, audible deviations from flat rather than narrow peaks: a lift from 700Hz-1.5kHz and again from 5kHz up, plus a cancellation notch around 1.4kHz from port/cabinet interaction.
Buy the JBL Studio 530. It ranks higher for sound quality than the KEF Q100 and costs less, so there is no real case for the other one.
Specifications Side By Side
| JBL Studio 530 | KEF Q100 | |
|---|---|---|
| Price | $399 Discontinued | $550 Discontinued |
| Ranked | #30 of 63 in Medium Size Bookshelf Speakers | #45 of 63 in Medium Size Bookshelf Speakers |
| Bass Extension (-3dB) | 88Hz (measured, Audio Science Review) | 85Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 65Hz (measured, Audio Science Review) | 65Hz (measured, Audio Science Review) |
| Crossover Frequency | 1.5kHz | - |
| Dimensions | 18.4"H x 8.4"W x 8.7"D (467 x 214 x 222 mm) | 11.8"H x 7.1"W x 10.7"D (300 x 180 x 272 mm) |
| Impedance | 6 ohms nominal (4 ohms minimum, measured by Audio Science Review) | 8 ohms nominal |
| Sensitivity | ~85dB (measured by Audio Science Review) | 85dB (2.83V/1m, measured, Audio Science Review) |
| Drivers | 5.25" (130mm) PolyPlas™ cone woofer with SFG magnet, 1" (25mm) compression driver with Teonex® diaphragm on Bi-Radial® horn | 5.25" Uni-Q aluminum coaxial driver, 1" aluminum dome tweeter |
| Discontinued | Yes | Yes |
| Weight | 17 lbs / 7.7 kg each | 13 lbs / 5.9 kg each |
| Woofer Cabinet | ported | ported, rear |
| Frequency Response | - | 49Hz - 40kHz (+/-3dB) (Manufacturer specified) |
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The Two Speakers In Full
JBL Studio 530: $399 Discontinued
Pros: CEA2034 spinorama shows a fairly flat on-axis response. Predicted in-room response is very smooth aside from the high-frequency roll-off.
Cons: A peak around 1.4kHz is attributed to a tweeter resonance, and shows up as a distinct spike in harmonic distortion at that frequency along with a second resonance-driven bump around 2kHz. Response rolls off in the high frequencies and the tuning is a bit bass-shy overall. Cumulative spectral decay (waterfall) shows the same 1kHz-region resonances lingering in time. Discontinued.
Full JBL Studio 530 review and specifications →
| Bass Extension (-10dB) | 65Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 88Hz (measured, Audio Science Review) |
| Crossover Frequency | 1.5kHz |
| Dimensions | 18.4"H x 8.4"W x 8.7"D (467 x 214 x 222 mm) |
| Discontinued | Yes |
| Drivers | 5.25" (130mm) PolyPlas™ cone woofer with SFG magnet, 1" (25mm) compression driver with Teonex® diaphragm on Bi-Radial® horn |
| Impedance | 6 ohms nominal (4 ohms minimum, measured by Audio Science Review) |
| Sensitivity | ~85dB (measured by Audio Science Review) |
| Weight | 17 lbs / 7.7 kg each |
| Woofer Cabinet | ported |
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- Links
- Reviews, Comparisons and Sound Samples
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KEF Q100: $550 Discontinued
Pros: 5.25” Uni-Q coaxial driver keeps the tweeter and woofer point-source aligned for consistent imaging. 86dB sensitivity is reasonably easy to drive.
Cons: CEA2034 spinorama shows broad, audible deviations from flat rather than narrow peaks: a lift from 700Hz-1.5kHz and again from 5kHz up, plus a cancellation notch around 1.4kHz from port/cabinet interaction. Bass sensitivity drops to about 80dB and impedance falls below 4 ohms in the bass, demanding a capable amplifier. The reviewer heard boomy, buzzing bass that improved somewhat with the port plugged, and could not recommend it, calling the famous reputation more about looks than sound. Discontinued.
Full KEF Q100 review and specifications →
| Bass Extension (-10dB) | 65Hz (measured, Audio Science Review) |
|---|---|
| Bass Extension (-3dB) | 85Hz (measured, Audio Science Review) |
| Dimensions | 11.8"H x 7.1"W x 10.7"D (300 x 180 x 272 mm) |
| Discontinued | Yes |
| Drivers | 5.25" Uni-Q aluminum coaxial driver, 1" aluminum dome tweeter |
| Frequency Response | 49Hz - 40kHz (+/-3dB) (Manufacturer specified) |
| Impedance | 8 ohms nominal |
| Sensitivity | 85dB (2.83V/1m, measured, Audio Science Review) |
| Weight | 13 lbs / 5.9 kg each |
| Woofer Cabinet | ported, rear |
As an eBay Partner, we may be compensated if you make a purchase.
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons