“ Well firstly this is not a true iem. The sound is about as great as one could get from an earbud. In my limited experience and without trying the pk1, I would say these are the finest buds you can buy. With that said, these are not for everyone, this is a niche product within an already niche market. I find driving it with my D12 anaconda makes for a pleasurable sound,...” --Jamesdeandoa
“Looking at the picture of the PK3's I wasn't expecting much. They look and feel cheap using a generic case for the drivers making them easy to fake. (In fact my first pair were fake!) these earbuds sound GREAT! Especially considering the price ($44) I have a few pair of earbuds in this same and higher price range and these PK3's knock all of them out of the water. They have a flat sounding...” --thebluebulk
“ I looked around for a review on these and didnt find many, so bought a pair and heres what i found out. - Nice build quality - Good comfortable fit - Worst cable design I have ever seen (wtf were they thinking?!) - Easy to be driven - Extremely well defined mids & highs (these are not laid back and softsounding!) - Good soundstage...” --fabiosouzajr
“ These were my sweetest sounding head-gear yet. It would be brilliant all-rounder if it would not require a portable amp for portable use. This is the first reason i left it, otherwise i almost got an ear infection from those foams.., they get dirty in a few weeks of massive use. I recommend them to clean, i boiled them in water. ” --angevoi
“ I've tried out several pairs of in-ear phones and never got used to the feel of them. These are much more inviting straight away, as several earpads of different sizes are included. I found my size and was off to the races. The cable is a bit short, and I usually have to bring the included extension cable along with me on my commute. This is not a problem, just an...” --phallumontis
Denon’s new $249 AH-C300 may be the biggest, bassiest in-ear monitor in headphone history. Each of the IEM’s seemingly bulky earpieces has one of Denon’s patented Double Air Compression Drivers. It’s an arrangement with dual 11mm drivers, both firing at each other into a chamber that vents directly to your ear. A miniature control wheel gives the same functionality as on...
“full and detailed review here: http://www.head-fi.org/t/714564/denon-ah-c300-iem-review ” --xkonfuzed
“OK so this headphone has been a trial for me. I bought with high hopes as I was looking for a AH-D7000 equivalent in in an IEM and in this case a $90 IEM, not a small order! So the question is did it achieve my goal and is it a worthy $90 contender? To answer my first question I can say it's not my D7000 but it does a VERY good job of coming close and is worth trying for anyone looking...” --dweaver
PK2 earphones are the low impedance version of PK1. Although not as good as PK1, PK2's sound signature is similar to PK1. You don't have to drive PK2 with an expensive head-amp. If you are looking for something with high performance/price ratio, PK2 might be the best choice.