I was able to get a pair of HD 330s from a local shop. I noticed the frequency response has a bump in the 7k to 12k . Does anyone know if these use the same driver as the HD 660 since both are rated at 150 ohms? Does anyone the time to model a notch filter for these phones? I need something to do while waiting on the Mogami cable to show up for a recable.
First let it play in for a while (100 hours or so) If it still has too much highs by then just see if you can get it to sound correctly using equaliser settings. Then e-mail or PM me the settings and I'll design a filter for it (the same type as for the HD681 but specifically for this phone, 150 Ohms)