“ The PK3 is a great, warm earbud. It does vocals especially well because it is very mid-focused. It has impressive bass extension, not especially strong impact; the trebles are smooth and may roll off too soon for clarity and detail nuts. But the mids are what the PK3 are all about. ” --kmhaynes
“ 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 been out of the loop for a while when it comes to budget IEMs. Back in the day, the low priced options were simply not very good. I remember paying $40 for the V-MODA Bass Freq as a workout IEM because I liked the massive impact, though it was obviously not an "all purpose" type IEM. I used them with my Creative Zen Micro Photo...” --project86
“ For a comparison of the NE-600X vs 700X vs 770X, see here: http://www.head-fi.org/t/623137/review-comparison-nuforce-iems-ne-600x-ne-700x-ne-770x quick summary: - bass sloped sound - tiny fit - great clarity/detail - fantastic sound for $35 and easily the top choice between the 600/700/770X ” --Armaegis
“ I initially bought these as a temporary replacement for my AKG K26Ps that crapped out on me after being left in a car for two weeks, and because I knew I'd want earbuds for music on the go. Given that I bought these for around $30, I was astounded at the audio quality these earbuds produced. The NE-6 has far more bass than any other earbud I've come across so far, and while there isn't a...” --OmegaSwitch
“ 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
“ Overall I have been satisfied with these phones. I would not recommend paying full price for them like I did. ” --Skoch
Uncompromising, hi-fidelity earphones deliver unparalleled accuracy, exceptional clarity, full-bodied bass, and a rich, enveloping sound. The in-ear, isolating ear-tips block out 90% of external sounds. A comfortable, ergonomic design, along with cable options, minimizes outside sounds.
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.