Summary: I first bought a pair of these in 2008 at full price (approx £90), and was very happy. Very happy until the day they were nicked along with my 160Gb iPod in a London pub. I've since graduated to the Sennheiser IE8, but at aprox £30, I've decided to replace the AH-C551 as a back up. £30 is a crazy price for these 'phones - they perform in the £100 arena!
Summary: Comes in a clam shell case which protect them when not in use. They act as sound deadening when in an airplane. You can hear all the dialogue if you are watching at in-flight movie - but you will need to by a 2 pin adaptor to use them.
Summary: I have had a set of these phones for a couple of years but stupidly left them on a flight last month. Managed to find them here for less than half I originally paid so very chuffed. Sound quality is very good with a sensible balance of bass and tebble and a clear frequency definition.
Summary: Hi Fellow Amazonians, Great service even though I had an issue with delivery from Amazon, this was sorted out excellently. As for the reseller, superb service and answered the couple of email queries I had straight away....so far so good :) As for the product, Superb value...and I really do mean superb value!!!! an absolute steal.
Summary: I have been looking for a new pair of in the ear phone for a few weeks now to use with my Ipod shuffle. I started searching for reviews for various Sennheiser and Philips phones. Every review was pretty good but there were always negative points about the quality of the ear piece, the lack of bass or way the cables become tangled too easily. Many of the reviews used the Denon 551 as a benchmark for quality of the hardware and quality of the sounds.
Summary: Als Ergänzung zu meinen anderen Kopfhörern wollte ich noch einen in-ear, der wirklich kaum Umgebugsgeräusche durchlässt, und genau das leistet der Denon einwandfrei. Auch die Klangqualität an diversen Geräten ist gut, der Klang ist neutral, keine überbetonten Bässe und verlorenen Mitten.
Summary: Ich habe noch nie Kopfhörer mit so einem unbeschreiblich satten und feinen Klang gehört. Bässe donndern, Mitten sind unglaublich präzise und Höhen kommen glasklar rüber. Verarbeitung ist genial: Habe die Dinger jeden Tag im Einsatz und "knäul" sie immer achtlos in die Tasche zwischen x andere Sachen. Kabelbruch? - Keine Spur. Schon seit über 6 Monaten im Dauereinsatz und immer noch wie am ersten Tag.