RCF SUB 905-AS MK3: 2200W Compact 15" Sub That Drives Dancefloors
Serious low end, fast setup, road-tough build. SUB 905-AS MK3 packs a 2200 W Class-D amplifier and a 15" woofer with 3.0" voice coil into a compact, polyurea-coated hardwood enclosure that is stackable and easy to move. It delivers up to 133 dB with a 40–120 Hz operating range for clean, musical bass.
Smart DSP on board. Built-in processing with Bass Motion Control keeps response linear, while selectable presets, crossover, polarity, cardioid mode, and output delay let you adapt to rooms, rigs, and SPL targets without extra hardware.
System-friendly I/O. Stereo XLR inputs and stereo XLR outputs integrate easily with tops; PowerCON in/out streamlines power distribution. The M20 pole mount supports top-on-sub setups for mobile DJ and corporate AV rigs.
Real-World Applications and Sound Roles
- Mobile DJ Bass Engine: Tight, deep extension for weddings, ballrooms, and private events.
- Club Pop-Ups: Compact footprint with high headroom for takeovers and lounges.
- Corporate AV: Discreet, stackable sub with easy delay and crossover control.
- Cardioid Arrays: Directional low-frequency control to keep stages and mics cleaner.
- Top+Sub Rigs: M20 pole mount for quick pairing with matching RCF tops.
Where the RCF SUB 905-AS MK3 Excels
- High Output, Small Box: Up to 133 dB from a compact, stackable enclosure for tight load-ins.
- Real Bass Range: Operates 40–120 Hz for musical punch and modern program material.
- Power to Spare: 2200 W Class-D amp with fast transient response and low heat loss.
- Driver Authority: 15" woofer with 3.0" voice coil and ceramic magnet handles demanding sets.
- RCF DSP: Bass Motion Control, presets, polarity, and delay maintain clarity at show volume.
- Cardioid Made Simple: Built-in cardioid mode supports two or three box arrays for controlled LF.
- Tour-Ready Finish: Polyurea-coated hardwood, steel grille, and ergonomic side handles.
- Clean Integration: Stereo XLR in/out, selectable crossover, and M20 pole mount.
- Power Linking: PowerCON in/out simplifies distro on mobile and festival stages.
- Built for Chicago DJs: Optimized for top+sub rigs that must hit hard without blowing up the floorplan.
Control Modes for RCF SUB 905-AS MK3
- Preset Selection: Choose response voicings from the onboard DSP to suit program and venue.
- Crossover: Selectable low-pass filtering for seamless handoff to RCF tops.
- Polarity: Quick 0°/180° selection to maintain summation with mains.
- Cardioid Mode: Built-in settings support two- or three-cab arrays for directional LF control.
- Delay: Output delay for time alignment to flown or ground-stacked tops.
- Gain: Input sensitivity selection to match sources at -2 dBu or +4 dBu.
Power Platform: 2200 W Class-D with Show-Ready Dynamics
The internal amplifier delivers punchy, low-distortion output with ultra-fast attack and minimal heat loss. Convection cooling on a solid heat exchanger keeps the module quiet and reliable during long sets.
Bass Motion Control for Clean Low End at High SPL
RCF’s proprietary processing extends low-frequency linearity while protecting the transducer. The result is tight, musical bass that holds together when the floor fills and the mix gets dense.
Tour-Grade Enclosure, Built to Stack and Travel
A multi-ply hardwood cabinet with a scratch-resistant polyurea coating, steel grille, and ergonomic side handles makes transport easy. An M20 threaded pole mount supports secure top-on-sub setups.
System-Friendly I/O and Signal Flow
Stereo XLR inputs and stereo XLR outputs with selectable crossover speed integration with mains, while PowerCON in/out simplifies power daisy chaining across the front line.
How to Deploy RCF SUB 905-AS MK3 in the Field
Top+Sub: Place subs on the floor at the stage edge; set the sub’s crossover to match your RCF tops. Verify polarity for maximum summation and trim with the polarity selector if needed.
Cardioid Pair or Triple: Use the onboard cardioid mode with one rear-facing cabinet and the corresponding preset. Match gain and delay across the group for controlled LF and reduced stage bleed.
Delay Alignment: Use the output delay to align ground subs with flown or delayed mains. Start with distance offset and refine by ear or measurement.
Pole Mount: Use the M20 threaded socket for stable top-on-sub rigs; confirm weight and balance of your chosen top.
Fast, repeatable workflow: set crossover, confirm polarity, dial delay, and lock in cardioid when the room demands control.
Why Choose the RCF SUB 905-AS MK3 from AVMaxx
We help Chicago DJs and event pros specify sub systems that hit hard without guesswork—voicings, crossover settings, and cardioid layouts that translate from ballroom to club.
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 905-AS MK3
What are the key output and frequency specs?
The sub delivers up to 133 dB with an operating range of 40–120 Hz, driven by a 2200 W Class-D amplifier.
Can I build a cardioid subwoofer array with this model?
Yes. The onboard cardioid mode supports two- or three-cab arrays. Use the matching cardioid preset, align delay, and keep gain consistent across the group.
What inputs and outputs are available?
Stereo XLR inputs and stereo XLR outputs with selectable crossover are provided, plus PowerCON in/out for power linking.
Is there a pole mount for top-on-sub setups?
Yes. An M20 threaded pole mount on the top panel supports stable top+sub configurations.
Tell us your tops, room size, and desired SPL—AVMaxx will configure crossover, delay, and cardioid settings for a clean, hard-hitting low end.
