RCF SUB 705-AS MK3: Portable 15-inch Power for DJs and Live Sound
Compact punch, tour-tough build. The RCF SUB 705-AS MK3 is a portable, high-power 15-inch active subwoofer designed for small to mid-sized venues and mobile rigs. A 1400 Watt Class-D amplifier and a state-of-the-art 15-inch woofer with a high-power ceramic magnetic circuit deliver headroom-rich low end up to 131 dB SPL.
Bass Motion Control (BMC). RCF’s advanced excursion management replaces traditional high-pass filtering with a custom algorithm that limits over-excursions while preserving phase integrity and very low-frequency content for extended, musical bass.
Smart I/O and crossover flexibility. Stereo XLR inputs and stereo XLR outs with selectable LINE/HIGH PASS routing integrate cleanly with 10-inch or 12-inch tops. Rear-panel controls include Volume, EQ, Polarity, and X-OVER preset.
Road-ready cabinet. The rugged all-plywood enclosure with scratch-resistant polyurea coating, steel grille with internal foam, M20 top pole mount, and convection-cooled amplifier (no fan) is built for daily transport and reliable performance.
- Real-World Applications and Sound Roles:
- Mobile DJ systems needing tight, extended low end in compact footprints.
- Small clubs, lounges, bars, and wedding/corporate rooms.
- Live sound with 10-inch or 12-inch tops where fast load-ins and clean stage looks matter.
- Portable rental stock that must withstand frequent transport and varied rooms.
Where the RCF SUB 705-AS MK3 Excels
- Fast Load-Ins: Ergonomic side handles and a 30 kg weight streamline venue turns for weddings, clubs, and corporate sets.
- Right-Sized Footprint: 598 x 420 x 590 mm (H x W x D) fits tight stages and mobile DJ booths without crowding mains.
- All-Night Reliability: Class-D amp with soft limiter and thermal/RMS protection maintains punch under long sets.
- Road-Ready Build: Baltic birch plywood, polyurea coating, and steel grille resist dings and daily transport wear.
- Clean Presentation: Black finish with internal grille foam looks pro on camera and under room uplights.
- Smart I/O & Routing: Stereo XLR in/out with selectable LINE/HIGH PASS simplifies 2.1 setups with tops.
- Reliable Output: Up to 131 dB SPL with 1400 W peak/700 W RMS for confident coverage.
- Stable Footing: M20 threaded pole mount supports clean, compact satellite rigs.
- Built for Chicago DJs: Optimized for quick ballroom turnovers, club takeovers, and mobile rigs.
Control Modes for RCF SUB 705-AS MK3
- X-OVER Presets: Selectable 80 Hz or 120 Hz crossover for system alignment.
- Polarity Reverse: Quickly correct phase relationships with nearby tops.
- Output Signal: Choose LINE or HIGH PASS on the stereo XLR outputs to feed satellite loudspeakers.
- Level & EQ: Rear-panel Volume and EQ tailoring for room and rig.
- Protection & Limiting: Soft limiter plus thermal/RMS safeguards maintain the character of the input signal at all levels.
Power That Moves
The 1400 W Class-D amplifier delivers ultra-fast attack, realistic transient response, and low heat loss. Convection cooling and a solid aluminum rear heat exchanger eliminate moving parts. The stereo input circuit with crossover uses a low-distortion design and advanced safety limiter, preserving signal integrity at high output.
Bass Motion Control
BMC maps the woofer’s dynamic behavior and applies a custom algorithm that only limits over-excursions. Unlike traditional high-pass filters, BMC extends linearity and low-frequency reach while maintaining phase behavior for tighter, more natural bass.
Tour-Ready Workhorse
All-plywood construction with polyurea coating, powder-coated steel grille with internal foam, and an isolated amp chamber enhance durability and reliability. Frontal vented ports allow use in recessed spaces, and the M20 top mount supports clean satellite stacks.
Power Options & Part Numbers
220–240V: Part No. 13000812, EAN 8024530020484
100–120V: Part No. 13000817, EAN 8024530020910
How to Deploy RCF SUB 705-AS MK3 in the Field
For compact 2.1 rigs, feed the sub’s stereo XLR inputs from your mixer. Use the OUT HIGH PASS to send filtered signals to your 10-inch or 12-inch tops, selecting the 80 Hz or 120 Hz X-OVER preset to match the venue and mains. Place the sub centered under the tops or as a pair flanking the booth for more even coverage. Use the Polarity Reverse control to optimize summation at the crossover. Mount a satellite using the M20 threaded pole for a clean footprint.
Dial the X-OVER first, then set polarity and level for tight, musical low end in any room.
Why Choose the RCF SUB 705-AS MK3 from AVMaxx
AVMaxx pairs field-tested setup advice with inventory built for Chicago DJs and event pros. We understand fast load-ins, clean stage looks, and dependable low end that carries a dancefloor without muddying your vocals or keys. Ask us about pairing strategies with popular 10-inch and 12-inch tops and routing that keeps your rig simple and reliable.
AVMaxx is your partner for RCF systems—field-aware recommendations, dependable support, and builds that help Chicago DJs and event pros perform with confidence.
Frequently Asked Questions — RCF SUB 705-AS MK3
What tops pair best with the SUB 705-AS MK3?
It is designed to complement 10-inch or 12-inch loudspeakers, creating compact 2.1 systems for mobile DJ and small venue use.
What crossover options are available on the rear panel?
Selectable X-OVER presets at 80 Hz or 120 Hz, plus LINE/HIGH PASS output routing to feed your tops appropriately.
How does Bass Motion Control affect the sound?
BMC manages woofer excursion with a custom algorithm that preserves very low frequencies and phase behavior, improving linearity and clarity at high levels.
Is the amplifier fanless?
Yes. The Class-D module is convection-cooled via a solid aluminum heat exchanger, eliminating moving parts.
Are different power versions available?
Yes. 220–240V (Part No. 13000812, EAN 8024530020484) and 100–120V (Part No. 13000817, EAN 8024530020910) versions are available.
Tell us your tops, room size, and typical gigs—we’ll help you lock in crossover, polarity, and placement for maximum impact.
