CWT128 vs JBL-P3366MX — Compare
JBL CWT128 2-WAY Full-range Crossfire Waveguide vs JBL SRX918SF 18-inch Subwoofer
The CWT128 is a full-range two-way speaker designed for wide-angle coverage in medium venues; the SRX918SF is a dedicated subwoofer for deep bass extension in large sound reinforcement systems. Choose the CWT128 if you need comprehensive coverage of a space; choose the SRX918SF if you're adding low-frequency punch to an existing PA or touring rig.
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JBL CWT128 2-WAY Full-range Crossfire Waveguide
Specs side by side
| JBL CWT128 2-WAY Full-range Crossfire Waveguide | JBL SRX918SF 18-inch Subwoofer | |
|---|---|---|
| Price | $3,585.00 | $3,499.00 |
| Brand | JBL | JBL |
| Speaker Type | Line Array | Subwoofer |
| Install Type | Installed | Portable |
| Condition | New | New |
Why choose JBL CWT128 2-WAY Full-range Crossfire Waveguide
- ✓ Compact two-way design covers both midrange and high frequencies in one unit
- ✓ 160° × 60° horizontal coverage eliminates dead zones in medium rooms
- ✓ Flexible 70/100V transformer and 8-ohm bypass for various installation types
- ✓ Lighter weight (40.9 lbs) simplifies rigging and portability
Why choose JBL SRX918SF 18-inch Subwoofer
- ✓ Dedicated 18-inch driver extends bass response down to 35Hz for deep low end
- ✓ 2,500-watt Class D amplifier delivers 134dB SPL with dynamic headroom
- ✓ Networked DSP control via dual etherCON ports for phase alignment across multiple units
- ✓ Reinforced birch plywood cabinet supports both ground-stacked and suspended rigging
Frequently asked questions
Can I use the CWT128 and SRX918SF together?
Yes. The CWT128 covers midrange and highs (96 Hz to 19 kHz), while the SRX918SF extends the low end down to 35 Hz. In a large PA system, you would use the subwoofer for bass and CWT128s for mid-high coverage, using the SRX918SF's DSP delay and phase tools to align them.
Which is better for a small venue or retail space?
The CWT128 is designed for this application. It is compact, offers flexible mounting, and provides full-range sound in a single unit. The SRX918SF is overkill for small spaces and requires additional speakers to cover the rest of the spectrum.
What's the main difference in power and output?
The CWT128 produces 129 dB SPL at 1 meter with modest amplifier power, making it efficient for passive or low-power distributed systems. The SRX918SF includes a built-in 2,500-watt amp and reaches 134 dB SPL but is designed only for bass frequencies and must be paired with separate mid and high-frequency speakers.
Which requires more technical setup?
The CWT128 is simpler—mount it and connect audio. The SRX918SF requires system integration, network configuration for DSP, phase alignment across multiple subs, and careful EQ shaping to blend with other speakers, making it better suited for professional touring or installed sound teams.