Summary: I purchased this pair of headphones after my Sennheiser HD 202 stopped working recently. The Sennheiser HD 202 was slightly cheaper than the AKG K451. Since the AKG K451 was priced at a little more, I believed that it should have more to offer. A friend of mine used the AKG K451 for a year and had some good things to say. This was a motivation for me to try it out.
Warm and safe sound for portable use and long listening periods.
João Soares, Amazon
30 August 2014
Summary: Warm and safe sound but a little muffled and muddy. I guess it's not the best around, but as a package is a nice portable product and sound is ok. Also very, very easy to drive. I would say it's a design that makes sense for portable use and long listening periods. For true hifi you must look elsewhere (still prefer my lovely Grados SR60i). Build quality is good and the the carrying case a nice touch.
Summary: Had a pair of Soundmagic E10's that broke after two years of use. Thought moving to AKG K451's would be a significant upgrade. Returned them and bought another pair of E10's. Richer Sounds could not have been more accommodating though. One of my favourite companies to deal with. Great service that I've experienced every time for more than fifteen years across multiple branches.
Summary: The sound quality on these headphones is very good, especially for the price. I think as such these are some of the best value headphones you can get and they are well designed. They feel solid too so I would expect them to last well. My only complaint and this is true of many on ear headphones is they let in a lot of back ground sound.
OK, but a little disappointed (UPDATE - more disappointed!)
MR D P POPE, Amazon
4 July 2014
Summary: I'm not really sure what all the fuss is about. These headphones are built nicely, come with a very nice travel case, and have a few cables which is useful. I have been using B&W C5 in ear headphones which do sound amazing but make my ears ache after a few hours. Thought I would get these for long plane journeys. Plugged into my iPhone, the same source as the C5s they sound OK.
Summary: A truly stunning set of headphones with an experience marred by some poor customer service. One set of cables was not working so I filled in a form on the AKG website. I was informed via email that I had written to the wrong department and was given an email address to contact. I subsequently received a further email again telling me I had written to the wrong department and given yet another email address to get in touch with.
Summary: The sound quality is good but I wasn't exactly blown away; I'm glad I didn't pay £130 for these. They're also uncomfortable to wear for any great length of time. The case that comes with them is a bonus I suppose, but they lose a star for over-packaging.
Summary: I read plenty of reviews of this headphone before I placed an order. Everything seemed good, 5 star reviews pretty much everywhere including What Hi-Fi. The build quality is indeed good but for me the sound seriously lacked treble. They are bass heavy and the sound can be described as slightly 'muddy'. They had about 20hrs burn in time with only a subtle improvement.