Our Verdict Smashing all-rounders that really sing For Spacious sound Well balanced Very detailed Against Big and not foldable Not exactly portable Reviewed on 23rd January 2013 With the K551s, AKG has taken the Award-winning K550s, added in-line controls, slimmed-down and shortened the cable and included a carry pouch in an attempt to turn them into a portable pair of cans. While we’re not entirely convinced their sheer size isn’t the first stumbling block in that argument, we certainly have no quarrel with their sound. A closed-back design with a spacious open-back style performance, the K551s sound expertly balanced – and never boring or flat. They convey every last detail of any genre you throw at them, with top-notch timing ensuring an upfront, exciting listen wherever you are. More after the break See all our headphone Best Buys Follow whathifi.com on Twitter Join whathifi.com on Facebook Related News The best What Hi-Fi? deals of the month Fri, 23 Jun 2017, 03:24pm Best headphone deals - in-ear, over-ear, wireless and more Thu, 22 Jun 2017, 05:32pm B&O Play reveals new E4 noise-cancelling headphones Thu, 15 Jun 2017, 08:00am The 10 most popular reviews on What Hi-Fi? Fri, 02 Jun 2017, 02:29pm Bank Holiday sales 2017 – best UK tech deals Fri, 26 May 2017, 06:07pm AKG Headphones K551 Stay on top of your sound with What Hi-Fi? in your inbox every week Thank you for registering for our Newsletter We will send you relevant emails and updates.