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.
Technical Details * Impedance:32 ohm(at 1KHz) * Frequency response: 20-20,000Hz * Sensitivity:120 dB (at 1KHz) * Max Input Power: 400 mv
Get your bling on with these stylish Monoprice earphones! With a sensitivity of 98 dB and a noise-isolating design, these earphones will provide plenty of volume to keep the world outside and the music inside your ears. The 47" cord is long enough to give you the freedom to move about and to keep your iPod safely in your pocket when you're mobile. It isn't enough to just have...
“ 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
“ 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
“ 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
“ I read reviews on this and I said let me try this out, for $10 I couldn't lose. This surpassed all of expectations for a $10 IEM. I am going to purchase a set for my wife, she was also blown away by the sound. ” --Taharqa
“ Ok, I caved and bought 2 pair of these when I needed a mini to regular HDMI cable for a new laptop. They are impressive. I like the black color better than the silver too. One thing I quickly figured out is if you reverse them (R<-->L), the cable exits out the top, and you can then loop it over your ears. It seems to fit better this way. By flipping them...” --Neeky