Kef R400 Specifications and Review

The Kef R400 ranks #81 out of 136 total Medium Powered Home Subwoofers (30–75 lbs) for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.

#81 Kef R400

  • CEA-2010-A Average (40-80Hz): 110.8 dB (avg of 3/4 bands)
  • Country: United Kingdom
  • Dimensions: 14.4”H x 13.0”W x 13.8”D (365.8 x 330.2 x 350.5 mm)
  • Discontinued: Yes
  • Driver(s): (2) 9 inch
  • Enclosure: sealed
  • Measurement Source: Brent Butterworth
  • Output SPL at 20 Hz: 85.8 dB
  • Output SPL at 25 Hz: 87.3 dB
  • Output SPL at 31.5 Hz: 92.7 dB
  • Output SPL at 40 Hz: 107.4 dB
  • Output SPL at 50 Hz: 111.5 dB
  • Output SPL at 63 Hz: 113.6 dB
  • Warranty: 5/2/5
  • Weight: 47.39lbs / 21.5kg
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