The jam heavy metal hx p920 portable wireless speaker gives you a sleek compact way to play your favourite music rocking sound crank up the volume and enjoy those powerhouse tunes with 20 w of great sound the jam heavy metal speaker features dual precision tuned drivers for crisp audio quality augmented by two passive bass radiators to fill out the low end style and convenience this portable speaker has been crafted from a piece of anodized aluminium with bevelled edges to give it a slick