AC118S vs SRX815 — Compare
JBL AC118S 18 High Power Subwoofer System vs JBL SRX815 15" Two-Way Bass Reflex Passive System
The AC118S is a dedicated subwoofer designed to augment existing PA systems with extreme low-end extension and control, while the SRX815 is a full-range two-way speaker system that delivers both lows and mids in one box. Choose the AC118S if you need surgical sub-bass impact for electronic, funk, or studio work; pick the SRX815 if you want a versatile, all-in-one live rig for rock or hip-hop.
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JBL SRX815 15" Two-Way Bass Reflex Passive System
Specs side by side
| JBL AC118S 18 High Power Subwoofer System | JBL SRX815 15" Two-Way Bass Reflex Passive System | |
|---|---|---|
| Price | $1,620.00 | $1,489.00 |
| Brand | JBL | JBL |
| Condition | New | New |
Why choose JBL AC118S 18 High Power Subwoofer System
- ✓ Dedicated 18-inch subwoofer with tight, articulate bass and surgical control
- ✓ Extreme physical impact and visceral low-end punch
- ✓ Optimized for electronic music, funk, and studio sessions
- ✓ Integrates seamlessly as a sub in larger multi-speaker systems
Why choose JBL SRX815 15" Two-Way Bass Reflex Passive System
- ✓ Full two-way system (15-inch woofer plus 1-inch compression driver) covers entire frequency range in one unit
- ✓ Lower price point and more compact footprint
- ✓ 136 dB max SPL with 3200 W peak power—plenty of headroom for live venues
- ✓ Flexible floor or monitor configuration with suspension points and feet
Frequently asked questions
Do these work together, or do I have to pick one?
They serve different roles. The AC118S is a dedicated subwoofer that pairs with full-range speakers; the SRX815 is a complete two-way speaker on its own. You could use the SRX815 alone for smaller gigs or combine multiple SRX815s, or build a larger rig with SRX815s plus an AC118S sub for extended low-end reach.
Which goes lower—the 18-inch or 15-inch?
The AC118S, as a purpose-built subwoofer, is engineered for deeper, more controlled sub-bass response. The SRX815 reaches down to 41 Hz and handles full-range duties, but the AC118S is optimized exclusively for the bottom octaves with greater articulation.
What's the real difference in portability and setup?
The SRX815 is a single compact box (18.82" × 18.03" × 27.20") that works as a floor monitor or main speaker right out of the box. The AC118S requires integration with other full-range speakers and is purpose-built for that role, making it heavier and less flexible as a standalone unit.
Which is better for touring rock or hip-hop?
The SRX815 is specifically listed as ideal for touring and rock/hip-hop, with the flexibility to run as a floor monitor or main speaker in flexible configurations. The AC118S is designed as a sub component, so you'd need to add full-range speakers to complete a touring rig.