Hi guys,
Just wanted to update, received my clone HD400 today, and all the hum and buzz (including games) is completely dead. And I cant thank all you guys enough for your suggestions and help with this.
But I do feel that wiring though the HD400, the richness of the speakers is quite reduced, and they sort of sound like when I got them first (like the burn-in time required). Also, the overall volume is reduced to like 1/4th which is not a big deal, but I do hope my speakers will back again begin to sound how they were sounding before wiring this product, hopefully within couple of hrs of playing.
Also, I dont know if this is normal with jbl 305s, but I can't hear footsteps of players or even myself in BF5 unless I crank up the volume super high (too high to enjoy the game/audio).