Short answer: the JBL Synthesis SCL-6. It ranks #10 of 28 in-wall speakers by sound quality, rated 3.9/5, at $3,629.90. The JBL Synthesis SCL-7 ranks #14, rated 3.7/5, at $2,419.90, $1,210 cheaper, not enough of a saving to outweigh the sound-quality gap.
The case for the JBL Synthesis SCL-6: A high output in-wall speaker with four woofers and a horn tweeter, giving very even, accurate sound across the room. The tradeoff: Bass is limited without a subwoofer, and a 3.92 standard score trails the best in-wall speakers here.
The case for the JBL Synthesis SCL-7: An affordable way into a premium in-wall range, with a horn tweeter and consistent coverage across the room. Watch for: The response sits in a wide 4.1dB reference band with 0.43dB average on-axis deviation, so tonal balance is less even than the JBL Synthesis SCL-6.
Buy the JBL Synthesis SCL-6. It is rated higher for sound quality, and saving $1,210 with the JBL Synthesis SCL-7 does not make up for the sound-quality gap.
Looking for alternatives? See the complete Passive Home rankings.
Prices on this page were last checked November 11, 2026 at 3:26 AM 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.
As an eBay Partner, we may be compensated if you make a purchase.
Specifications Side By Side
| JBL Synthesis SCL-6 | JBL Synthesis SCL-7 | |
|---|---|---|
| Price | $3,629.90 per pair | $2,419.90 per pair |
| Ranked | #10 of 28 in In-Wall & In-Ceiling Speakers | #14 of 28 in In-Wall & In-Ceiling Speakers |
| Drivers | Four 5.25” aluminum matrix cone woofers, 1” 2410H-2 compression driver on HDI horn (2.5-way) | Two 5.25” aluminum matrix cone woofers, 1” 2410H-2 compression driver on HDI horn (2-way) |
| Enclosure | In-wall, open back | In-wall, open back |
| Mounting Cutout | 157 x 766mm (6.18 x 30.18 in) | 157 x 458mm (6.18 x 18.03 in) |
| Dimensions | 31.3”H x 7.3”W x 3.8”D (796 x 185 x 97 mm) (92mm mounting depth) | 19.1”H x 7.3”W x 3.9”D (486 x 186 x 99 mm) (93mm mounting depth) |
| Weight | 22.2 lbs (10.07 kg) | 12.6 lbs (5.72 kg) |
| Sensitivity | 91dB (2.83V/1m, 2pi anechoic) | 88dB (2.83V/1m, 2pi anechoic) |
| Impedance | 4 ohms | 4 ohms |
| Power Handling | 25-200W recommended amplifier power | 25-150W recommended amplifier power |
| Frequency Response | 50Hz-30kHz -6dB (manufacturer, 2pi) | 55Hz-30kHz -6dB (manufacturer, 2pi) |
| Crossover Frequency | 1.8kHz | 2.0kHz |
| Bass Extension (-3dB) | 67.4Hz (measured, spinorama.org Erin’s Audio Corner data) | 67.4Hz (measured, spinorama.org ASR data) |
| Bass Extension (-10dB) | 40.8Hz (measured, spinorama.org Erin’s Audio Corner data) | 42.3Hz (measured, spinorama.org ASR data) |
| Spinorama Preference Score | 3.92 | 3.46 |
| Spinorama Preference Score with Perfect Sub | 6.71 | 6.21 |
| DIY Kit | No | No |
Related Speaker Comparisons
How JBL Synthesis SCL-6 compares with other leading options: