Denon AHC751K In-ear Headphones (Black)

I purchased the Denon AHC751 ear phone 3 weeks ago and have been using them almost everyday. I read countless reviews on the current ear-phones from Shure to Ultimate Ear and for the price these seemed to get the best user responses. I was previously using a set of Sony in-ear phones which I still like alot and cost half as much as the Denon's

The comment that was consistent with majority of reviews concerned the burn in time. The performance of the the phones out of the box were "hot" and changed over a period of use. I must agree. I found the high freq ranges were exaggerated and the bass was a bit "boomy". But as most of the other reviews mention, it settled down after approx. 10 hours of use.

The mids and highs compared to the sony were a mild improvement but an improvement nonetheless. I am mildly disappointed in the bass. It is has a nice response to the low end freq but not quite what I was hoping for. I guess my Sony's weren't that bad after all. I...Read more

From sites such as [...], I wanted to note that these are apparently the same IEMs as the well-reviewed Denon C700, with some accessories (extension headphone cord, case) included. I would suggest reading reviews for the Denon C700 here and on headfi to aid in your decision.

At the current time the C751s with included accessories are selling for less than the C700, so check the prices for both and choose accordingly.

I will add further details on my impressions on this model (compared to my current Senn CX300) after I have had some more time to evaluate them.

*** Update 04/29/07 - THIRD time trying to update this review, not clear why Amazon keeps ignoring my updates ....

Now that I've had a chance to try the Denon C751 headphones for an extended period, I have to say that I am quite happy with them and recommend them highly for those who prefer the sound signature they provide (see details below).

Build quality -...Read more

I think the most important feature of earbud headphones is how well they can produce low end sound, and fortunately the 751K does this quite well. The bass is not boomy like some cheaper earbuds that accentuate low frequencies; the 751K accurately reproduces how the bass should sound in the recording. But to get good bass make sure to try the different earpieces to get the best fit, and then cram the buds as far as you can into your ear. Source quality is also important (I use apple lossless).

The construction quality is good and I actually am using the case this time because I'm tired of my earbuds breaking. I like that they come with an extender cable because that's the part that always breaks (the part that connects to the music player). So if the extender breaks I can just buy a new one instead of having to replace the entire headset. I also like that the left earbud has a small notch on the side so I can tell that it is the left bud without looking. They are...Read more