Summary: What you get is a very smooth and detailed sound. ZERO sibilance and unwanted artifacts, you could listen to these for hours without any strain. 4k and 12k ranges up 3-4 dB.
Pros: Well made and provided with an array of ear plugs in various materials and sizes. The 'short' cord is not really an issue, could be considered a feature, especially if you're using these with the Sansa Clip+, which can sit high up on a lapel or in a shirt pocket. The extension cord is fine if you need longer.
Cons: The previous reviewer is correct, these are very heavy on the mid range, and light on treble. The good news is, that can be fixed fairly easily with equalization, by bumping the
Pros: I like the design, I don't feel the cords are too long or short, easy to distinguish left from right, no tangling, sound quality is better than standard or what would be considered 'good'. $44 with new egg promo.
Cons: The mids are way too much. Like the last TDK pair I owned, the shell surrounding the drivers is a hard thin plastic that may crack if you have an accident - I cracked my last pair, and I don't even know how, but I was able to glue it back together. I've never broken a pair of earbuds before. I am just pointing this out because this pair appears to have the same plastic hollow shell that surrounds the drivers.
Summary: "The TDK BA100: Like Beige Wallpaper, But..."
...I Like Them! I have all of about 4 hours of listening time with these headphones, but I don't think I need more to justify my thoughts. They are BA (balance armature) drivers so burn-in is not a factor. For this test I used my iPod Classic (no external amp and no EQ adjustments). Many, many different tips were used to tweak the sound signature, but you may be surprised at what I used in the end.