The JBL Synthesis 1400 Array ranks #176 out of 227 total Large Size Floorstanding Speakers for sound quality. See all Passive Home rankings for every top pick.
Brand: JBL
Prices on this page were last checked October 14, 2026 at 2:38 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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#176 JBL Synthesis 1400 Array: $11,500 per pair Discontinued eBay
Pros: A three-way JBL Synthesis floorstander with a 14-inch woofer and a large horn-loaded compression driver, for very high clean output, and deep bass in published measurements (49.1Hz at -3dB, about 29Hz at -10dB). It scores 5.08 on its own, strong for a horn speaker. Measured bass extension of 29.3Hz (-10dB).
Cons: Discontinued around 2007 and found only used. Directivity varies a lot (4.12dB), so room reflections sound different from the direct sound, and the measurement data is low quality.
| Bass Extension (-10dB) | about 29.3Hz (derived, log-interpolated between spinorama.org -9dB/-12dB points) |
|---|---|
| Bass Extension (-3dB) | 49.1Hz (measured, manufacturer data via spinorama.org) |
| DIY Kit | No |
| Drivers | 14” LE14H-3 woofer, 3” 435Al compression driver on a horn, 045Ti ultra-high-frequency driver |
| Impedance | 8 ohms |
| Sensitivity | 89dB (manufacturer specified) |
| Spinorama Preference Score | 5.08 (spinorama.org) |
| Spinorama Preference Score with Perfect Sub | 6.36 (spinorama.org) |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the JBL Synthesis 1400 Array measures across the audible range. A flatter listening window (the sound arriving straight at you) is more neutral: peaks sound forward or harsh, dips sound recessed. The estimated in-room response adds what a typical room does, and there a gentle, even tilt down toward the treble is ideal. Both curves are shifted so their 300 Hz to 3 kHz average sits at 0 dB.
Measurement data: spinorama.org, measured by an independent reviewer.