£199.00 £ 199. Marshall. $("#recommend_widget").siblings('.section-header').removeClass('hide'); This stout-hearted hero produces a larger than life multi-directional sound that will immerse you in your music, indoors or out. Marshall Kilburn II Portable Bluetooth Grey Speaker Login to see prices This stout-hearted hero weighs only 5.5 lbs and is the loudest speaker in its class. The Kilburn II uses Bluetooth v5.0 aptX where the original Kilburn uses Bluetooth v4.0 The Kilburn II has Multi-Directional sound with a rear-facing speaker.