RCF SUB 15-AX 15" Powered Subwoofer for Modern Live Rigs
The RCF SUB 15-AX is a professional 15-inch active subwoofer that centralizes low-frequency power and system management in one compact, portable enclosure. A 2200 Watt Class-D amplifier driving a latest-generation 15-inch woofer delivers up to 133 dB of clean, controlled bass for small to mid-sized venues, mobile DJ rigs, club installs, and corporate production.
Inside, a powerful DSP engine with a color 2.4-inch touch display manages crossover presets, 8-band parametric EQ, routing, delay, cardioid functions, and alignment tools. With factory-tuned crossover presets for RCF tops and extended FiRPHASE phase linearity, the SUB 15-AX not only hits hard, it locks in seamlessly with your full-range cabinets so mixes stay punchy, articulate, and consistent across the room.
The multi-ply hardwood cabinet with polyurea coating, Powercon TRUE1 TOP connectors, and M20 threaded pole mount is built for life on the road. Stackable geometry, side handles, and black or white finish options make the SUB 15-AX equally at home in Chicago ballrooms, clubs, houses of worship, and AV rental fleets where fast turnaround and reliable impact matter every night.
Real-World Applications and Sound Roles
- Mobile DJ anchor sub: Build a compact 2.1 or 2.2 rig for weddings, quinceañeras, and corporate events with RCF 10-inch or 12-inch tops.
- Club and lounge low-end engine: Add tight, controlled bass for dance floors, bar lounges, and live DJ sets without oversized enclosures.
- Live band foundation: Support kick drum, bass guitar, keys, and tracks for small to mid-sized stages with plenty of headroom.
- Corporate and event production: Deliver polished, full-range sound for presentations, DJs, and playback in ballrooms and event spaces.
- Rental and production inventory: Standardize on one smart sub platform that covers 2.1, 2.2, and cardioid arrays with built-in presets and alignment tools.
- Chicago DJ and production rigs: Keep bass tight and musical in long, reflective rooms while the SUB 15-AX manages crossover and alignment for you.
Where the RCF SUB 15-AX Excels
- Fast Load-Ins: Compact 15-inch footprint, side handles, and stackable cabinet make it easy to move through elevators, docks, and tight club doors.
- Matched RCF Presets: Internal crossover presets are tuned for popular RCF tops, so you can build a show-ready system in just a few touches.
- All-in-One System Control: Dual combo inputs, dual XLR crossover outs, 8-band EQ, delay, and cardioid tools let the sub act as the hub of your rig.
- High Output, Small Box: A 2200 Watt Class-D amplifier and 15-inch woofer deliver up to 133 dB SPL with clarity and punch for modern music playback.
- Touchscreen Workflow: The 2.4-inch color touch panel with rotary encoder streamlines setup, tuning, and preset recall even in low-light stages.
- Bass Motion Control: Advanced excursion management allows extended low-frequency response without sacrificing stability or sonic integrity.
- Road-Ready Construction: Multi-ply hardwood with rugged polyurea coating, steel grille, and sealed Powercon TRUE1 TOP AC connector stand up to daily use.
- Flexible Deployment: M20 pole mount, black or white finish, and cardioid configuration support let you adapt to clubs, churches, and corporate rooms.
- Built for Working DJs: Designed to support fast turnarounds, back-to-back sets, and Chicago-style mobile events where reliability and impact matter.
Control Modes for RCF SUB 15-AX
The SUB 15-AX packs a full-featured DSP section accessible from the rear-panel color touch display and the LiveRemote app, giving you precise control over your entire low-frequency system.
- Color touch interface: A 2.4-inch display and rotary push encoder provide fast access to crossover, EQ, delay, and routing parameters.
- Factory crossover presets: Internal presets optimize time alignment and crossover points for compatible RCF loudspeakers, extending FiRPHASE to the sub.
- Dual crossovers: Independent crossover control for left and right channels feeds the XLR Xover outputs, simplifying 2.1 and 2.2 configurations.
- 8-band parametric EQ: Shape the system response for each room with fully parametric filters on the full-range outputs.
- Top/Sub alignment: Delay controls in meters, feet, or milliseconds let you time-align tops and subs for coherent impact at the audience position.
- Cardioid and L/R balance: Built-in cardioid functions and left/right balance tools support directional bass and 2.1/2.2 layouts.
- Snapshots and presets: Store and recall up to eight system snapshots so your favorite ballroom, club, and rental setups are always ready.
Advanced Subwoofer Presets for RCF Tops
The key to optimizing your sound system is precise subwoofer time alignment. Correct alignment not only cleans up the crossover region, it also strengthens bass response so the audience feels both the beat they hear and the vibe in the room.
With internal factory-tuned crossover presets for RCF speakers, SUB AX subwoofers make your rig show-ready in just a few steps. Connect your satellite speakers to the SUB AX, select the appropriate preset from the user interface, and the system aligns itself. FiRPHASE linear phase is extended to match the subwoofer down to the lowest frequencies for a tight, musical handoff.
- Faster setup: Factory crossover presets reduce guesswork and speed up soundcheck.
- Tighter bass: Time-aligned subs and tops improve impact and clarity on the dance floor.
- Consistent results: Presets help repeat successful system voicings from show to show.
Download Preset List — SUB AX Series (RCF)
Touch Display and Snapshot-Based System Tuning
The SUB 15-AX replaces guesswork with a clear, fast workflow centered on its 2.4-inch color touch panel. Navigating crossover points, EQ curves, and delay settings is as simple as swiping through screens and confirming choices with the encoder. Eight recallable snapshots let you build presets for specific rooms, stacks, and rig sizes, so returning to a familiar venue becomes a matter of loading the right scene and making minor tweaks for the night.
- Clear visual feedback: See filters, delays, and status at a glance without diving through complex menus.
- Show-ready scenes: Store DJ, live band, corporate, and rehearsal snapshots for repeatable, consistent performance.
- On-the-fly adjustments: Make level, EQ, and delay changes between sets without interrupting the show flow.
Bass Motion Control and FiRPHASE Accuracy
RCF’s Bass Motion Control (BMC) excursion management allows the SUB 15-AX to reproduce the lowest audible frequencies while maintaining woofer stability. Instead of relying on a traditional high-pass filter that can disturb phase and feel, BMC uses a detailed model of the driver’s motion to limit only destructive excursions. Combined with FiRPHASE, the result is extended, musical bass that stays tight and aligned with your tops, even when the system is pushed hard.
- Extended low-frequency reach: Preserve deep kick and synth content without losing definition.
- Consistent phase behavior: Maintain a coherent response between tops and subs across the crossover region.
- High-output stability: Keep the woofer under control during peak moments while protecting the transducer.
LiveRemote App Control for Working DJs and Engineers
With the LiveRemote app, the same platform used for ART 9 AX models, you can control SUB AX subwoofers directly from your Android or iOS device. System EQ, delay, and crossover parameters are available on screen, making it easy to fine-tune the rig from the audience area instead of guessing from the booth or side of the stage.
- Wireless adjustments: Walk the room while tailoring EQ and level for real crowd conditions.
- Preset access: Select crossover presets and configure top/sub alignment without reaching behind the cabinet.
- 2.2 operation: Pair two SUB 15-AX units and manage a 2.2 system with balanced left and right low-frequency coverage.
Road-Ready RCF Construction for Demanding Schedules
The SUB 15-AX cabinet is built from high-quality multi-ply hardwood coated in a tough polyurea finish that resists scratches and impact. A powder-coated steel grille with acoustically transparent backing protects the transducer from dust and debris, while the M20 pole socket provides solid support for matching RCF tops. Powercon TRUE1 TOP connectors give you locking, sealed AC connections ideal for frequent load-ins, outdoor work, and long show days.
- Durable enclosure: Multi-ply hardwood with polyurea coating is designed for touring and heavy rental use.
- Practical handling: Side handles and stackable geometry ease transport between vehicles, docks, and stages.
- Black or white finishes: Match modern venues, houses of worship, and corporate decor without compromising performance.
- Secure power: TRUE1 TOP mains connectors reduce accidental disconnects during energetic DJ and live shows.
How to Deploy the RCF SUB 15-AX in the Field
Deploying the SUB 15-AX starts with treating it as the system’s low-frequency and processing hub. Position the sub where it can load the room effectively, then let the built-in crossover presets and delay tools take care of the handoff to your tops. For most DJ and live sound applications, centering the sub near the dance floor or stage and flying or pole-mounting RCF tops above it provides a strong, even low-frequency foundation.
- Connect your source: Run left and right outputs from your mixer or console into the SUB 15-AX combo XLR/TRS inputs.
- Feed the tops: Use the XLR crossover outputs to drive your RCF 10-inch or 12-inch loudspeakers, keeping cabling straightforward.
- Select the right preset: From the touch panel or LiveRemote app, choose the matching crossover preset for your top boxes.
- Time-align the rig: Use the top/sub alignment delay (meters/feet/milliseconds) to align arrival times at the main listening position.
- Set cardioid or 2.2 layouts: When using multiple subs, engage the cardioid and balance controls to tighten bass on stage and focus energy on the crowd.
- Save your scene: Store successful setups as snapshots so recurring rooms and event types can be recalled quickly.
With crossover presets, delay, and cardioid tools built in, the RCF SUB 15-AX lets you deploy powerful, controlled bass for Chicago events without dragging a separate DSP rack to every gig.
Why Choose the RCF SUB 15-AX from AVMaxx:
AVMaxx understands how the SUB 15-AX fits into real-world DJ and live sound systems, from compact 2.1 rigs to more advanced 2.2 and cardioid arrays. Our team works daily with Chicago DJs, clubs, and production companies that demand tight, musical low end, smart presets, and fast load-ins, so we know what it takes to make this sub perform at its best in ballrooms, lounges, and multi-use venues.
When you source the SUB 15-AX from AVMaxx, you get more than a box on a pallet. You get guidance on pairing it with the right RCF tops, suggestions for crossover presets, and practical tips for delay and cardioid deployment. Whether you are upgrading from a basic sub or building a fresh RCF system, we can help you choose the right quantity, configuration, and accessories to unlock everything the SUB 15-AX platform offers.
AVMaxx is your partner for RCF solutions—field-aware recommendations, dependable support, and builds that help Chicago DJs and event pros perform with confidence.
Frequently Asked Questions — RCF SUB 15-AX
What types of systems is the RCF SUB 15-AX best suited for?
The SUB 15-AX is designed for small to mid-sized live sound systems, including mobile DJ rigs, club and lounge installs, houses of worship, and corporate AV setups using 10-inch or 12-inch RCF tops. It delivers enough output for modern music while remaining compact and easy to transport.
How do I connect my tops and use the internal crossover on the SUB 15-AX?
Connect the left and right outputs of your mixer to the combo XLR/TRS inputs on the SUB 15-AX, then run the XLR crossover outputs to your full-range RCF loudspeakers. From the touch panel or LiveRemote app, select the appropriate crossover preset for your tops and adjust level and delay as needed.
Can I control the RCF SUB 15-AX from my phone or tablet during DJ sets?
Yes. Using the LiveRemote app on Android or iOS, you can access crossover presets, system EQ, delay, and other parameters over Bluetooth. This lets DJs and engineers fine-tune the sub from the dance floor or audience area instead of guessing from the booth.
Does the SUB 15-AX support cardioid or 2.2 subwoofer configurations?
The SUB 15-AX includes cardioid functions and L/R balance controls that support directional bass setups when multiple subs are used. You can configure 2.1 or 2.2 systems and use the onboard delay and cardioid tools to reduce low-frequency buildup on stage and focus energy toward the audience.
What is included with the RCF SUB 15-AX when purchased from AVMaxx?
AVMaxx follows the official RCF packing list for the SUB 15-AX. Refer to the What’s Included section of this page for the most up-to-date contents, and contact us if you need clarification on accessories or recommended add-ons for your specific system design.
Share your room size, music style, and existing gear, and AVMaxx will help you build an RCF SUB 15-AX system that delivers tight, exciting bass for every Chicago show.
