JBL VRX915S Manual
PDF manual · 24 Pages
English
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Frequently Asked Questions
The VRX915S has a frequency range of 35 Hz to 250 Hz (-10 dB) and a ±3 dB response from approximately 40 Hz to 250 Hz, providing solid low-frequency reinforcement for small to medium venues.
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Yes. The VRX915S is designed as the companion subwoofer for the VRX928LA and is fully compatible with the VRX-SMAF array frame and SS4-BK pole mounting when used in supported configurations.
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The VRX915S includes integrated flying hardware and a top-mounted M20 threaded socket for the SS4-BK adjustable pole. It can be flown with the VRX-SMAF frame, pole-mounted over a companion speaker, or ground-stacked following JBL’s load and safety guidelines.
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The VRX915S is rated at 800 W continuous (1600 W program, 3200 W peak) and can achieve a maximum SPL of around 126 dB, providing ample output for a variety of live and installed sound applications.
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Yes. JBL provides active tunings and DSP presets for VRX systems on their website (www.jblpro.com/tunings). Use recommended presets for optimal performance and compatibility with companion speakers.
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The VRX915S is not intended for permanent outdoor or high-moisture installations. Exposure to rain, prolonged moisture, or direct intense sunlight can damage drivers and finishes; protect the speaker or use weather-rated enclosures for outdoor deployments.
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Always inspect rigging hardware, follow JBL load tables, use only specified quick-release pins and forged eyebolts, consult a licensed engineer for permanent attachments, and adhere to regular inspection and maintenance schedules to prevent failure.
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Advantages and Disadvantages
Advantages
- Compact 15" Differential Drive woofer delivers tight, high-output bass with a max SPL of 126 dB.
- Rugged birch plywood enclosure with DuraFlex finish and steel grille for touring durability.
- Integrated flying hardware and M20 pole socket enable flexible flown, pole, or stacked configurations.
- Selectable input modes and NL4 connectors simplify wiring and system integration.
- Optimized companion for VRX928LA and VRX-SMAF arrays with available DSP tunings online.
Disadvantages
- White fixed-install models lack handles, feet, and pole-mount features limiting portability.
- 4-ohm nominal impedance may demand robust amplification for large setups.
- Not intended for direct outdoor or high-moisture exposure without proper protection.
- Maximum recommended load and rigging rules require experienced rigging knowledge and inspection.
- Single unit low-frequency extension is limited compared to larger 18" subwoofers.
Product Description
JBL VRX915S Manual — Powerful, Compact Subwoofer
The JBL VRX915S is a compact, purpose-built 15" bass-reflex subwoofer engineered to extend low-frequency performance for portable line-array systems and compact PA rigs. Designed as a companion to the VRX928LA line-array and fully compatible with the VRX-SMAF array frame, the VRX915S balances punch, portability, and rigging versatility. Its Differential Drive® 15" woofer and robust enclosure deliver tight, controlled bass for club shows, corporate events, houses of worship, and mobile sound reinforcement.
Built from multi-ply birch plywood with JBL’s DuraFlex™ finish and protected by a powder-coated perforated steel grille, the VRX915S is rugged enough for touring yet refined enough for permanent installs. The top-mounted M20 threaded socket accepts the SS4-BK adjustable pole for flown or pole-mounted setups, while integrated flying hardware provides straightforward array integration. Transport is eased by a built-in steel handle and optional caster kit compatibility.
Sonically, the VRX915S covers 35 Hz to 250 Hz (-10 dB) with a useful ±3 dB band from 40–250 Hz, offering a recommended high-pass Butterworth filter and variable low-pass settings for flexible crossover integration. With a continuous power rating of 800 W (program/peak headroom to 1600/3200 W) and a maximum SPL of 126 dB, the VRX915S supplies authoritative low end for small- to medium-sized venues. Nominal 4-ohm impedance and selectable input polarity modes (+1/-1 or +2/-2) allow convenient wiring with NL4 Speakon connectors and easy integration into bi-amped or full-range systems.
Rigging and deployment are central strengths: the VRX915S is intended to sit beneath or above compatible line-arrays, with clear warnings about safe stacking and suspension practices. JBL’s documentation emphasizes proper use of quick-release pins, eyebolts, and array frames (VRX-SMAF) and stresses inspection, licensed-engineer approval for structural attachments, and adherence to load limits. For white-finish fixed installs, a white variant is available which omits handles and pole features for aesthetic integration.
Whether used as a single pole-mounted sub or integrated into small flown arrays, the VRX915S is a versatile solution for professionals who need punchy low-frequency reinforcement from a compact, well-engineered package.
Notes
- Recommended EQ: +2 dB at 45 Hz, Q = 2.5 for enhanced low-frequency output.
- Use SS4-BK pole only with VRX928LA; do not mount VRX932LA-1 on VRX915S.
- White versions omit pole-mount and transport features for fixed installs.
- Active tunings and DSP presets available at www.jblpro.com/tunings.
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