Short answer: the JBL Synthesis SCL-4 for better sound quality, the Revel W990 for the lower price. The JBL Synthesis SCL-4 ranks #16 of 28 in-wall speakers, rated 3.6/5, at $7,259.90. The Revel W990 ranks #19, rated 3.5/5, at $4,239.90, $3,020 cheaper.
What the JBL Synthesis SCL-4 does well: A compact in-wall speaker with a horn tweeter, very even coverage and bi-amp terminals for custom theater installs. The catch: Bass is the weakest here, at 83.7Hz for -3dB and about 61.9Hz for -10dB in free air, so it needs a subwoofer.
The Revel W990 is the deeper-bass choice. A three way in-wall speaker with very deep bass for its type and room tuning controls for flexible placement. Its bass reaches about 32.2Hz before falling 3dB, against 83.7Hz for the JBL Synthesis SCL-4. Watch for: Its measured preference score is only 3.6, or 5.09 with a perfect subwoofer, because the midrange is uneven: on-axis deviation is high (0.86 normalized deviation on axis, 0.69 in the listening window) and on-axis smoothness is just 0.34.
Buy the JBL Synthesis SCL-4 when sound quality outweighs the price for you, and the Revel W990 when the price outweighs sound quality instead.
Still deciding? The full Passive Home rankings cover every ranked option.
Prices on this page were last checked November 7, 2026 at 7:34 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
| JBL Synthesis SCL-4 | Revel W990 | |
|---|---|---|
| Price | $7,259.90 per pair | $4,239.90 per pair |
| Ranked | #16 of 28 in In-Wall & In-Ceiling Speakers | #19 of 28 in In-Wall & In-Ceiling Speakers |
| Drivers | 7” aluminum matrix cone woofer, 1” 2409H compression driver on HDI horn (2-way) | 9” micro-ceramic composite (MCC) woofer, 3.5” midrange, 1” aluminum dome tweeter with waveguide (3-way) |
| Enclosure | In-wall, integrated MDF back box | In-wall, passive |
| Dimensions | 25”H x 16.1”W x 3.7”D (636 x 409 x 93 mm) | 20.7”H x 13.9”W x 4.1”D (527 x 352 x 103 mm) (95mm mounting depth) |
| Weight | 27.6 lbs (12.51 kg) | 17 lbs (7.7 kg) |
| Sensitivity | 91dB (2.83V/1m) | 85.9dB (measured, Audio Science Review) |
| Impedance | 6 ohms | - |
| Power Handling | 200W RMS maximum recommended amplifier power | 10-200W RMS recommended amplifier power |
| Frequency Response | 45Hz-33kHz -6dB (manufacturer, on-axis) | - |
| Crossover Frequency | 1.3kHz | - |
| Bass Extension (-3dB) | 83.7Hz (measured, JBL data on spinorama.org) | 32.2Hz (measured, Audio Science Review) |
| Bass Extension (-10dB) | 61.9Hz (measured, JBL data on spinorama.org) | 22.4Hz (measured, Audio Science Review) |
| Spinorama Preference Score | 3.56 | 3.60 |
| Spinorama Preference Score with Perfect Sub | 6.55 | 5.09 |
| DIY Kit | No | No |
| Mounting Cutout | - | 318W x 486H mm |
| Warranty | - | 5 years |
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