I posted this at
http://www.head-fi.org/forums/showth...&threadid=8135 in the thread about similar verticals:
I bought the A44L just for the heck of it, and because I wanted something I could carry around. I haven't yet received my Corda, but here's what I think. I'm comparing them to the ATH-W100 and MDR-F1, as well as an MDR-V6.
They're the most comfortable verticals I've tried (I used to have two that came with Sony and Aiwa portables). I think the rounded shape of the fairly large inserts is smoother and easier on your ears than the others. I burned them in for about 72 hours before really listening.
They sound surprisingly good from portable units with some real oomph, such as my Aiwa radio, D-25S, and WM-D6C. But they're not in the same class as any of the other cans I've listed. As easily carried portable cans, they're, well, very nice. People near you aren't going to hear too much, so they may be a nice substitute for closed cans. The leakage is pretty unobtrusive, far less than any supraural or circumaural open cans. Out of my Rotel preamp, which puts out around 2 amps (not mA) into the resistance presented by the A44L, they do sound better than out of the portables.
The bass is surprisingly clean and full, tight and well-defined, but it definitely drops off pretty fast. I'd say they start going down at about 150 hz, and drop pretty fast, but they're apparently very flat to that point. The mids are also surprising. A good deal of presence, clean, and fairly transparent. Voice is done pretty well. I think the mids are elevated when compared to the rest of the spectrum, but they blend well with the bottom end. The highs are elevated (I can clearly hear a hiss with these that is not present with any other cans or speakers, and it's not coming from the other components in my system). Cymbals and the like are not realistic. Blurred, smeared, dulled. Strings are OK, but not great. There's not much transparency at the top; it's like a two-way speaker with a fast midrange and a discontinuity at the cross-over to a slower-responding tweeter. There's absolutely no sibilant spitting like the V-6, and the highs are much more listenable, but they don't approach the W100 or the F1 at the top. No way!
Again, I've not listened to them from the kind of amplification claimed to transform them. I also didn't notice much difference from playing around with the fit and angle. Some slight changes, but nothing major. Sorry guys, but you'd have to have giant ear canals, like Dumbo, to get these in very far without splitting your head open. But anatomy differs.
So for $20, they're pretty damn good. I think they're nicer than the Koss 35 and 50 that I briefly listened to (far less boomy and muddled, much more listenable, and not too hi-fi-ish). But they're not giant-killers, and not in the same ballpark as the 580, 600, or the cans I have. I think they're more listenable than the V6, which I find to have a depressed midrange and irritating top end. I wish they had a better headband, thicker and softer (the plastic is pretty flimsy, although the folding feature is very nice).
ADDED 3/4, Post-Corda HA-1:
My opinion is unchanged. Nice for $20, but no way are these giant-killers. The deep bass, below about 100 hz, just isn't there. But there's no comparison with what the W100 can do -- and they're not as fast or as balanced as the F1. The mids are OK, but nothing even remotely close to the W100's transparency, solid imaging, and delicate detailing. The highs verge on strident, they're smeared, grundgy, and fatiguing. And on complex stuff they do give up completely.
Nice cheapies, though.