“Lets start off with the pros. When first out of the box they sounded great, good bass and slightly crushy highs but after a mere 10 hour burn in they sounded great, hard (but not thumping) bass and excellent no distortion highs. I mainly listened to EDM, house and hip hop and those genres sounded great in the ckx9is but vocal tracks from Ed Sheeran and Sam Smith wasn't at all shabby. Also, the...” --TheAfterEffect
“These iems are better than some entry levels (Shure 215/ hifiman RE0/ RE 400/ Sennheiser CX300) with a wider soundstage due to the 13mm dynamic driver , however need serious burn in for at least 50 hours to shine , lack sub bass and treble , perfect with vocals (Norah Jones / Yael Naim/ Celine Dion), not so convincing with classical music even at 24/96, bass not punchy enough for electronic...” --francopro
“When I got these headphones I was expecting something more than the ex-10lps, but what I got wasn't really that. The treble is very crashy, sometimes to the point which it isn't pleasant to your ears. The mids are alright, only sometimes will they be distorted by the other registers. The bass is lacking, despite the box saying that it has "Rich Bass". One of the things that I do like...” --yousakura
“ CKS line improves the main problem of traditional audio technica products which was bass. CKS50 did not focus on the quantity but the quality of bass, it does not have the quantity for hard rock music but it was tight and powerful enough for pop-rock also it still have the sweet mids like audio technica do which makes my perfect choice for j-pop female vocal.” --Kiln
“ As of 2013, I could only find one pair of these on the internet. It's a shame because from my experience, cheap earbuds are oriented around the muffled bass emphasis and exhausting higher mid ranges. I myself came from the Audio Technica a900x and Bose IE2's which sound darker compared to these $10 earbuds. I love rich vocals and acoustic...” --Nec3
Manufacturer/Supplier: Audio-Technica U.S., Inc Manufacturer Part Number: ATH-CKM99 Brand Name: Audio-Technica Product Model: ATH-CKM99 Product Name: ATH-CKM99 Earphone Product Type: Earphone Connectivity Technology: Wired Wireless Technology: Not Applicable Cable Length: 23.62' Wireless Operating Distance: Not Applicable Sound Mode: Stereo Impedance: 16 Ohm Minimum Frequency Response: 5...
“ Comfort & Fit First thing to note, these earphones use balanced armature drivers rather than dynamic. Because of this getting a good seal is critical for the sound. Without a proper seal they sound tinny with no bass. Straight out of the box the fit is awkward as you have to sit there fiddling with the memory wire that sits around the ear so that it sits firmly....” --dogroll
“I recently bought these as an upgrade to my Head Direct RE0's. The RE0's are outstanding value for money, and there is not many headphones that can beat it ... until I got my hands on the CK100's. The CK100 packaging box is nice - very simple, and does the job more than adequately. What I noticed on it, which I've not seen in many other headphone boxes is that it lists the product code for...” --s0126471