I'll make it short and sweet. I had these items for quite a few years. I have BGVP dm7, dmg, Andromeda, Campfire and quite few other great ones. I'll always known that these XBA are sensitive to impedance. That's said, I was looking for a high impedance adapter for another application and found an 80 ohm one at Amazon. They didn't work for my other project, but since I had them laying around, I decided to see what would happen if I paired the adapter with the XBA 40... Wow! What a difference. It totally change the signature. The sound became fuller...

I've always been happy satisfied with the sound I get from my BGVP DMG, but I just made a discovery that makes them great. Looking at other BGVP iems ( just bought the DM7) on Aliexpress i came across an offer for a modified filter that claimed to tame the bass in the gold filter. I bought it and out does what it claims, great actually, it made the iem a lot more enjoyable. I used like that on and off for a while (I like to switch iems) but then I had an extra balanced cable laying around so decided to tried on to heat how they would sound, plugged...