“I am not good with reviews , so this is gonna be a small review (will probably update it later with more thoughts/impressions) Simply put, NT6 is one AMAZING CIEM, and definitely a level (or two) up , from all the previous TOTL (C)IEMs i owned ( K3003 , UM Miracles , Custom Art Anzu V2 ) I am using it with a Whiplash Hybrid V3 cable , so my impressions come from this...” --proedros
“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
“Months ago I believed the JH13Pro Freqphase to have the most clarity when it came to Custom In-Ear Monitors, but I was properly blown away by the Hidition NT-6 Pro with its death-defying clarity and resolution. Introduction After spending a lot of time with my JH13Pro I decided to seek another CIEM to possibly challenge or even defeat it. After browsing the ever-beloved head-fi.org, I...” --VisceriousZERO
“ 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
“ Overall I have been satisfied with these phones. I would not recommend paying full price for them like I did. ” --Skoch
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.