HomeRCF Sub 708-AS Mk3

RCF Sub 708-AS Mk3

18" 700W Active Subwoofer

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£1,249.00 inc. VAT
Get it by Monday
In stock
Special Offers Added:

SKU: DJK32279847

Special Offers When bought with this product

Key Features

SUB 708-AS MK3 18" Birch Ply Active Subwoofer with DSP 700W Black

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.

Main 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



Product Description

Product Specifications

Acoustical Specifications

  • Frequency Response: 35 Hz ÷ 120 Hz
  • Max SPL: 133 dB


  • Woofer:  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

Amplifier Specifications

  • Total Power:  1400 W Peak, 700 W RMS
  • Low frequencies:  1400 W Peak, 700 W RMS
  • Cooling:  Convection
  • Connections:  VDE


  • Cabinet Material: Baltic birch plywood
  • Hardware: Pole mount
  • Handles: One each side
  • Pole Mount/Cap: yes
  • Grille: Steel with clothing
  • Colour: Black

Physical & Dimensions

  • Height: 693mm / 27.28 inches
  • Width: 505mm / 19.88 inches
  • Depth: 685mm / 26.97 inches
  • Net Weight: 40kg / 88.18 lbs


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RCF Sub 708-AS Mk3

Delivery And Stock Information

Free next working day delivery on orders over £100 placed before 3:30pm Monday to Friday.

Orders placed at the weekend or after 3.30pm on Friday will be delivered on the following Tuesday (excluding Bank Holidays).

Larger items / orders e.g large bass speakers or multiple speakers may have to be shipped via a pallet service which may take 1-2 days.

Please check the estimated delivery date on the product, some items can take 2-7 days to be delivered. 

Free next day delivery applies only to the UK mainland for orders over £100. Other locations will be charged as follows

    • Highlands and Islands 2-3 Days* + £25
    • Northern Ireland 2-3 Days* +£10
    • Deliveries will be made subject to the terms and conditions of the courier company. djkit.com will not be held responsible for late deliveries.

In the event that the items ordered are unavailable for next day delivery, you will be contacted by djkit.com to arrange a suitable delivery date.

"In stock" means that the product displayed is either in stock with ourselves or our suppliers and is available for delivery. Stock levels are subject to change without prior notice.


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Finance Available!

Finance options may be available, subject to status
Representative 0% APR Finance on all orders over £280
10% deposit then 6 months payment of £187.35
12 months 0% may also be available

You can apply for finance to purchase this item. A minimum 10% deposit is required and you can opt for either 24 or 36 monthly payments thereafter representative 16.9% APR.

RCF Sub 708-AS Mk3
from £39.36/month

Representative Example

Cash price £1,249.00, deposit £124.90. Borrowing £1,124.09 over 36 months with a representative APR of 16.9% fixed APR, the monthly payments will be £39.36 and the total amount payable will be £1,541.86

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