“ 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
“ Overall shallow V signature. Bleed- and boom-free bass that's punchy and fairly detailed (not much sub-bass) - just right for me. Mids are a little dry but good detail and vocals are very listenable without being too forward. Highs are crisp and detailed - was bordering on sibilant when new but has developed control from around 25 hours onwards - but would like a tiny bit more sparkle for my...” --wysinawyg
“ 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
Cyclone new product ECCI PR200 HIFI in -ear headphones PR200 Best for portable CD,MD and MP3 players High Performance T.P.E cord Driver: 9mm diameter,dome type(CCAW) Type:Closed,Dynamic Frequency Response:20Hz-20000Hz Impedance:55 Ohms at 1kHz Maximum Power Input:40mW Sensitivity:102dB/mW at 1kHz Cord Length(Approx.):1.4M,T.P.E OFC Y-type Connector:3.5mm(1/8")mini...
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.