“ Where to start? I bought these in-ear headphones from Best Buy a while back. They lasted me around 3 hours of total time out of the box before the left earphone began to produce crackled sounds and static. I take incredibly good care of my belongings and my Apple In-Ear Headphones are still working fine after nearly 2 years of continuous use as my primary set of in-ears. ...” --Kelu
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
“ 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
“This new version of tour is slightly better than the old ones. The bass part is less than the first version and I can tell Beats started to care about the sound quality. But still, everything else don't go very well on this earphone. It is still closed, make people dizzy. Still, I think we can get better sound quality earphones in this price other than Beats Tour. ” --justinliu327