So I have been listening to these on and off today. The SQ of these things are much like thinksound earphones but on a grander scale. It is in deed thinksound house sound. Supremely punchy bass. Nothing like a closed can to give you the goods when it comes to bass and the OV21 delivers. I am surprised just how much bass emphasis these have and it still has great balancing of the sound. Its a mild v shaped signature from what I am hearing but if your gonna make a woody closed can it better have some bass.
I had to throw on my custom made thick pure silver cable a friend made for me a long time ago these are the cables I was using on the ON2 actually. I had to use an adaptor as the 3.5mm jack on the left side of the ov21 was bit too recessed for the cable to fit natively. Not a big deal but was worth it. The OV21 has very good resolving capabilities and my cable here helps to tighten the sound even more so.
The sound has a density I appreciate about thinksound tunings. Have yet to hear a thinksound made phone with a thin sound. It becomes supremely musical due to that thicker note weight. Tonality is rich and has that woody timbre and natural warmth that again is a hallmark of thinksound. The only nit pick I have about the sound is that its has a closed can stage, otherwise it has all the hallmarks of what you want in a closed can. Great imaging, excellent full bodied sound signature`. It has some great passive isolation by the way. Plushy pads seal off external sound extremely well. These come with a micd cord and so could be used on the go. So far so good I am gonna use them on a variety of my sources and will report in between doing my earphone reviews.