RCF SUB-708AS-MK2 Active 18" Powered Subwoofer


RCF SUB-708AS-MK2 Active 18" Powered Subwoofer

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  • 1400 Watt Digital Amplifier
  •  18" Woofer, bass reflex housing
  •  Stereo crossover
  •  Switchable crossover frequencies
  •  Phase-reverse switch
  •  Electronic equalization, soft limiter and protection
  •  Stereo XLR input, Stereo XLR signal output

Thanks to the powerful 18” woofer, with 3.0” voice coil, and the 1400-Watt amplifier, the SUB 708-AS II is the perfect tool to increase the low end performance of a portable PA system, both in terms of output and frequency extension. Thanks to the built-in digital stereo crossover (DSP) with adjustable crossover frequency it can be easily and quickly set up as a satellite speaker system. The SUB 708-AS II perfectly match 12” or 15” satellite speakers. The SUB 708-AS II is the ideal companion subwoofer the RCF ART 3, ART 7 or D-Line Series.


RCF subwoofers are the first choice of many sound engineers, thanks to the very high SPL levels at very low frequencies, smaller dimensions compared to the competitors, self-powered design, and impressive size/weight to SPL output ratio. Your crowd will be able to live an engaging immersive musical experience.


The RCF cabinets are made of birch plywood coated with a textured black finish. The subs are stackable and light-weight, for easy set-up and tear down, thanks to the ergonomic handles. A pole receptacle allows the use of the box in various configurations. The powder coated front grille integrates a special transparent-to-sound foam backing on the inside to further protect the transducers from dust.


RCF's Class-D power amplifier technology packs huge performance operating with high efficiency into a lightweight solution. RCF amplifiers deliver an ultra-fast attack, realistic transient response, and impressive audio performance. The amplifier features a solid machined aluminium structure which not only stabilises the amplifier during transportation but also helps the fan-less heat dissipation. All the amplifiers present SMPS power supply section to produce maximum output and minimum weight.


Frequency Response 35 Hz to 120 Hz
Maximum SPL 133 dB
Woofer 18", 3" voice coil
Input Signal Balanced / unbalanced
Input / Output Connectors Stereo XLR
Input Sensitivity -2 dBu / 4 dBu
Crossover Frequencies 80 to 110 Hz
Protections Thermal, rms
Sensitivity Control: Yes
Limiter Soft limiter
Controls Volume, EQ, phase, xover
Power Supply Total Power: 1400 W peak, 700 W RMS
Frequencies 1400 W peak, 700 W RMS
Cooling Convection
Connection VDE connector
Material Baltic birch plywood
Handles 2 side
Pole Mount/Cap Yes
Dimensions (H x W x D) 26.2 x 20 x 27.5" (66.5 x 51 x 70 cm)
Weight 84 lb (38 kg)




D.O'B. Sound Pro is an Authorized Dealership of this brand and all brands that we carry. If we do not have current stock, we can special order directly from the manufacturer any item still in production.

Just send us a message and we will get you an ETA and pricing.



  • Most items are shipped out within 2 business days upon cleared payment
  • Ground shipping is free (orders over $40)
  • Free shipping only to the lower 48 states
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