{"product_id":"kef-r400b-subwoofer","title":"KEF R400b Subwoofer","description":"At just 31 inches square, the KEF R400b may be compact, yet it packs an incredible punch. With a reinforced and braced sealed cabinet, the R400b houses twin 9-inch LF drivers powered by twin 250W class-D amplifiers. The drivers are mounted back-to-back, to create ‘force cancelling’. This means the opposing reactive forces are nullified, resulting in no cabinet agitation and a clean, fast, powerful bass performance – perfect for any serious home theatre system.","brand":"KEF Audio","offers":[{"title":"Piano Black","offer_id":57409269530956,"sku":"KEFR400bB","price":833.33,"currency_code":"GBP","in_stock":true},{"title":"Piano White","offer_id":57419886526796,"sku":"KEFR400bW","price":833.33,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1053\/6891\/2204\/files\/kef-r400b-black.jpg?v=1777481388","url":"https:\/\/www.stoneaudio.co.uk\/products\/kef-r400b-subwoofer","provider":"Stone Audio","version":"1.0","type":"link"}