Been listening to these for the past few hours. Just like KEF, Onkyo came in aggressive with their first products into the headphone/iem world. Both sound very good and the price to performance ratio is very good.
The earphones are big but not M200 level. More like the CKS1000. Fit is great, even with the thick cable hanging down right next to the earlobe. Tips are some of the cheapest tips I've ever come a crossed. Thankfully, tip rolling is easy with these. I put the Auvio's on and no problems. Comes with a larger cloth covered hard case. One of the better cases I've seen.
Sound is quite balanced. Bass is pretty big but not too overpowering. There's a little bit of bloom but I'm sure it'll settle. Thankfully the midrange is smooth and forward. Very good midrange. Treble is also nice and smooth. There's no sign of sibilance, peakiness whatsoever. The sound is deep and wide. Another big chamber type of sound. Less coloration than the CKS1000's. I can tell these will need some burn in though. Overall, highly recommended and one of the better sounding earphones to date.
Headphones come out sounding excellent with no burn in. Bass seems punchier and tighter than the earphones. Midrange sounds close to the earphones with slight differences. Treble is smoother than the earphones. For having non fatiguing treble, both products give good sparkle but the headphones a little more so. The dual chamber gives a deep sound which draws you into the music. I listened to the headphones for a couple of hours and didn't realize it. Quite addicting. Comfort is quite good for having kind of thick pads. Clamping force is about perfect and the cups rotate to get a better fit. Very well designed on ear. Build quality is very good on both but I'm more impressed with the headphones.
The cables are pretty to look at and is very nice. It has a rubbery texture and microfonics are minimal.
Some eye candy.