SKU: 50913450371

RCF SUB 708-AS MK3 Bass Reflex Active Subwoofer - 18"

Sale price$1430.55 Regular price$1589.50
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Description

RCF SUB 708-AS MK3 Bass Reflex Active Subwoofer - 18"The SUB 708 AS mk3 is a portable 18" high power active subwoofer for live sound applications. It features a state of the art transducer with a high power ceramic magnetic circuit and a powerful Class D amplifier that delivers sound pressure levels up to 133 dB with exceptional headroom. Designed as the ideal complement for 8" or 10" loudspeakers, it provides outstanding performance in any application. Rear panel controls include volume, EQ, polarity,

The SUB 708-AS mk3 is a portable 18" high-power active subwoofer for live sound applications. It features a state-of-the-art transducer with a high-power ceramic magnetic circuit and a powerful Class-D amplifier that delivers sound pressure levels up to 133 dB with exceptional headroom. Designed as the ideal complement for 8" or 10" loudspeakers, it provides outstanding performance in any application. Rear panel controls include volume, EQ, polarity, and crossover frequency selection. The rugged all-wood cabinet with scratch-resistant polyurea coating makes it durable, easy to carry and install securely. With its versatility, sound quality, and high power output, the SUB 708-AS MK3 is perfect for small to mid-sized venues and portable applications.

Legendary subwoofers
RCF subwoofers are the first choice of many sound engineers, thanks to the very high SPL levels at very low frequencies, small dimensions compared to the competitors, self-powered design, long-term reliability, and impressive size/weight to SPL output ratio. Your crowd will be able to live an engaging immersive experience in both live sound or DJing applications.

Power That Moves
RCF's improvements in transducer design make them stronger and more powerful so the amplifier follows the evolution. With 1400W peak power, the Class-D amplifier manages extreme sound pressure levels with an ultra-fast attack, realistic transient response, and very low heat loss. The speaker design is energy-efficient so there's no need for a cooling fan. The amplifier is attached to a solid aluminum heat exchanger in the rear of the cabinet with no moving parts. The stereo input circuit with crossover features a new low distortion design with an advanced safety limiter, maintaining the true character of the input signal at all levels. RCF amplifiers are designed according to EN62368-1 for maximum safety and present a Switch Mode Power Supply section joining high-efficiency with minimum weight.

SUB 7 Series subwoofers can be configured from the rear panel, and features a full set of commands:
  • X-OVER PRESET 80Hz/120Hz
  • POLARITY REVERSE
  • OUT SIGNAL, LINE / HIGH PASS
Bass Motion Control
When searching for an extended bass with enhanced performance, RCF engineers found a way to remove the high-pass filter, replacing it with a forward-thinking approach. Introducing BMC (Bass Motion Control), the newly advanced woofer excursion management feature. The speaker equipped with BMC can handle the lowest audible frequencies without affecting the woofer stability, with extended linearity and better sound integrity.

The BMC method works by creating a complete map of the dynamic behavior of the woofer, to generate a custom algorithm that only limits over-excursions. This gives total freedom of signal reproduction to the transducer. When high-pass filters normally protect the woofer motion from becoming destructive but change the phase behavior, the new BMC algorithm breaks conventional rules.

Tour-Ready Workhorse
The subwoofer is suitable for a wide range of live sound applications. The rugged all-plywood cabinet is easy to carry and stack, due to its light-weight. All are equipped with ergonomic handles with rubber grips for easy set-up and tear down. The M20 threaded pole mount on the top allows the cabinet to support speakers with a pole mount. The heavy-duty polyurea coating, the powder-coated metal grille, and the rugged structure of the cabinet withstand long-term use and transportation. Separate housing for the amplifier guarantees component efficiency and reliability. An acoustically transparent sound foam backing on the inside of the grille ensures protection from dust and humidity. With its frontal vented ports, the subwoofer can also be used in recessed spaces.

Features
  • 1400 Watt Class-D Amplifier
  • 18” Woofer, bass reflex housing
  • Stereo Crossover
  • Switchable Crossover Frequencies
  • Polarity-reverse switch
  • Electronic equalization, soft limiter and protection
  • Stereo XLR input, Stereo XLR signal output
  • Bass Motion Control excursion management

Specifications

ACOUSTICAL SPECIFICATIONS
  • Frequency Response: 35 Hz ÷ 120 Hz
  • Max SPL @ 1m: 133 dB
TRANSDUCERS
  • Woofer: 1 x 18'', 3.0'' v.c
INPUT/OUTPUT SECTION
  • Input signal: bal/unbal
  • Input connectors: XLR
  • Output connectors: XLR
  • Input sensitivity: -2 dBu/+4 dBu
PROCESSOR SECTION
  • Hi-Pass Frequencies: 110 Hz
  • Low-Pass Frequencies: 80 Hz
  • Protections: Thermal, RMS
  • Limiter: Soft Limiter
  • Controls: Volume, EQ, Phase, Xover
POWER SECTION
  • Total Power: 1400 W Peak, 700 W RMS
  • Low frequencies: 1400 W Peak, 700 W RMS
  • Cooling: Convection
  • Connections: VDE
STANDARD COMPLIANCE
  • Safety agency: CE compliant
PHYSICAL SPECIFICATIONS
  • Handles: One each side
  • Pole mount/Cap: Yes
  • Color: Black
SIZE
  • Height: 693 mm / 27.28 inches
  • Width: 505 mm / 19.88 inches
  • Depth: 685 mm / 26.97 inches
  • Weight: 38.8 kg / 85.54 lbs
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 50913450371

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Kozok
Charlottesville, US
★★★★★ 5
can't beat the original...
Size: 26, Color: Truest Blue
Love them. 28 waist, 5' 6" bought size 26 and fit great.
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Reviewed in the United States on November 13, 2025
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L. Hendricks
Dallas, US
★★★★★ 5
Cute and comfy
Size: 30W x 29L, Color: Truest Blue
So comfortable and cute! I sized down and they fit just fine.
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Reviewed in the United States on June 5, 2026
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Me
Dallas, US
★★★★★ 5
Fre People quality and stylish Jean
Size: 25, Color: Truest Blue
quality jean/confort as usual because I have same jean in other colors / size is perfect as their size chart
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Donna
Whiting, US
★★★★★ 5
Runs big
Size: 24, Color: Night Hawk
Super cute but runs big. I’m typically a 25 and bought a 24. It’s still too big
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patty
Whiting, US
★★★★★ 4
SUPER great denim-should last for years!
Size: 30, Color: Truest Blue
lI don't know if these will be flattering on me, but I LOVE THEM. They're hip and cool and I will wear them although I am 65. Would look best with shorter shirts, but of course, not showing belly. A slim young woman would "kill" this look. Denim is heavy duty and all hardware top class. The ad said to size down, but I ordered my regular size. The waist is a little tight on me, but the barrel legs are loose and hang nicely. Definitely something I will wear with platform ankle boots or sneakers. I anticipate people will absolutely love them (younger folk) where people my age, may say hmmm because they are a statement piece.
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Reviewed in the United States on December 4, 2024

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