So in order to clean my room up, I had to complete a few of my halted DIY projects... they just took too much spaces with headphones in pieces and parts. So, those SawaFujI drivers in the AKG K271mkII. I think AKG wins the king of expensive yet cheap plastic construction. Not sure if the mechanical auto-mute device is supposed to be the redeeming factor. It doesn't work all the time, but I guess it's fun.
Since the cups were of such bad plastic, I damped it down with duct seal putty in the center area and plasticine around the rims. That aught to do it. After applying some cloth material and wood veneer over those somewhat sticky materials (specially the duct seal). Now the cups are...
the good part: doesn't ring plastic all over nearly as bad
the bad part: the cup interior surface is now rather flat, with very little depth, but large nonetheless.
Threw in some angel hair for good measure; with only the empty cups these 'headphones' did nothing but treble. As expected of tweeters.
Now the oddity is that I have pretty sharp highs (too much?), I've achieved sub bass, but the sound sound balance is just off. I'm guessing a lack of mid bass and parts of the midrange... I'll have to eventually dig out my measuring kit.
Another issue, it feels, is channel imbalance. I did have to rewire the internal wiring and due to terrible workability conditions (these shells are just so unpleasant to work with). Maybe it's that, then I can just resolder a few joints.
But it feels like there's phase imbalance. Am I going crazy?! for both sides I did wire
-Live wire to top pin of driver
-Ground wire to bottom pin of driver.
Am I supposed to alternate for the two drivers?
No pictures for the moment but aye... it's better than before but still not enjoyable. At worst I am dropping dynamics in these.
Edited by kalbee - 1/2/14 at 9:18pm