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JBL SRX915SF 15-inch Subwoofer vs JBL SRX918SF 18-inch Subwoofer
The SRX915SF is a compact, mid-range subwoofer optimized for versatility across touring and installed systems; the SRX918SF is a larger, deeper-extending unit built for large venues and festival-scale deployments. Choose the 915SF for mobile flexibility and moderate venues, or the 918SF for maximum low-end reach and high-SPL festival/arena work.
No sales tax on orders shipped outside California — total cost beats national retailers that charge sales tax in nearly every state.
Specs side by side
| JBL SRX915SF 15-inch Subwoofer | JBL SRX918SF 18-inch Subwoofer | |
|---|---|---|
| Price | $3,199.00 | $3,499.00 |
| Brand | JBL | JBL |
| Speaker Type | Subwoofer | Subwoofer |
| Install Type | Portable | Portable |
| Condition | New | New |
Why choose JBL SRX915SF 15-inch Subwoofer
- ✓ More compact footprint — easier transport and setup on smaller stages
- ✓ Still delivers 130dB SPL with tight, articulate bass response
- ✓ 15-inch driver is sufficient for mid-sized touring and installed applications
- ✓ Same professional DSP toolset and Class D amplification as the larger model
Why choose JBL SRX918SF 18-inch Subwoofer
- ✓ 18-inch driver extends linear response to 35Hz versus 36Hz — noticeably deeper low end
- ✓ 134dB maximum SPL — 4dB louder for large venues and outdoor festivals
- ✓ Integrated three-point rigging system for both ground-stacked and suspended deployment
- ✓ Dual Ethernet ports enable networked control across larger system arrays
Frequently asked questions
What is the practical difference in low-end extension between these two?
The SRX918SF reaches 35Hz linear response versus the SRX915SF's 36Hz — a 1Hz difference that translates to slightly deeper bass articulation in large venues but is negligible in smaller rooms or on indoor stages.
Which one should I pick for a touring rental fleet?
The SRX918SF is better for festival and large-venue rental work due to its 4dB SPL advantage and rigging flexibility. The SRX915SF is ideal if your fleet focuses on smaller theaters, clubs, and regional tours where size and transport logistics matter.
Are the amplifiers and DSP features identical?
Both models use a 2,500-watt Class D amplifier, LevelMax limiting, 24 adjustable filters, 2,000ms delay, and Throw Distance Correction. The SRX918SF adds dual Ethernet ports for networked multi-unit control in complex installations.
What is the price difference worth?
Both are high-end professional tools in the same price tier. The SRX918SF's premium justifies itself in large-scale systems where the extra 4dB output and deeper extension eliminate the need for additional subwoofers; the SRX915SF is a better value for mid-sized venues or budget-conscious rental pools.