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Ridley Acoustics KS320 300 Watt
12 inch Front Firing Powered Subwoofer

MSRP $585.95

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The Ridley Acoustics KS320 subwoofer is designed to provide earth shaking performance. The 12 inch extra long excursion woofer is combined with 300 watts of BASH class A/B amplification for high power and signal accuracy. The bass reflex enclosure with flared porting ensures extended bass response and extremely accurate low frequency imaging.


  • 12 Inch compressed composite woofer provides accurate and solid bass response due to its extreme strength to weight ratio
  • Butyl Rubber surround maintains accurate alignment and suspension of driver cone allowing for extreme bass performance.
  • Unlike foam surrounds used in competitors inferior products, Butyl Rubber will not dry or breakdown. Ridley Acoustics Subwoofers come with a lifetime driver warranty.
  • 300W class A/B amplifier utilizing the patented BASH technology for extreme high power and signal accuracy
  • integral rear-mounted 300 watt amplifier includes level, phase (continuously variable 0-180°), and crossover control to contour the subwoofer’s output to blend with virtually all loudspeakers and room environments.
  • integral low pass crossover network is continuously-variable from 40Hz to 120Hz and can be bypassed if it is preferable to use an external crossover located in an outboard receiver or processor.
  • The KS320’s integral amplifier incorporates a defeatable signal-sensing circuit that automatically powers up the amplifier when a signal is detected.
  • A double-insulated isolated-ground electrical supply prevents electrical ground loops and reduces the noise floor of the entire audio system.
  • includes spiked feet and rubber low frequency isolators
  • Transferable Warranty: 5 Year Amplifier / 25 Year Driver


  • Extra large 1.93 kilo (4.25 Lbs) magnet
  • 30 mm roll butyl surround
  • 50mm voice coil with 36mm long stroke
  • Frequency Response: 26Hz – 300Hz (System Response)
  • Crossover Frequency: 40Hz – 128Hz (Low-pass filter with bypass switch)
  • Phase Adjustment: 0 – 180 degrees (Continuously variable)
  • Amplifier Output Power: 300 watts, with thermal and clipping limiters
  • Audio Inputs: Summing stereo line level (RCA x2)
  • LFE (RCA shared with Left input connector)
  • Speaker level (Stereo 5-way binding post)
  • Input Impedance: Line Level – 20k ohms, Unbalanced
  • Speaker Level – 220 ohms
  • Input Power: 120V 60Hz AC
  • Input Power Connection: IEC 2-wire receptacle with integral fuse holder
  • Power (Mains) Fuse: 3A 250V GMA style Fast Blow
  • Power Modes: Auto signal sensing and always on
  • Auto Off Delay: ~10 minutes
  • Dimensions: 15-3/8''W x 17-5/16''H x 14-3/4''D, (39W x 44H x 38D)cm (without feet)
  • Weight: 43lbs (19.5kg)
  • Shipping Dimensions: 21''W x 20''H x 20''D,
  • (53W x 51H x 51D)cm
  • Shipping Weight: 51lbs (23.2kg)

Ridley Acoustics KS320 300 watt 12 inch Powered Subwoofer

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KS320 Powered Subwoofer amplifier

RIDLEY ACOUSTICS KS320 300 Watt Powered Subwoofer

ks320 subwoofer driver ridley acoustics