Happy HFI-680 owner for several weeks now. :-)
Paired with my E6 amp with the blue light EQ setting brings out the mids. I never listen to it without the amp.
Looking for an upgrade amp that can work while charging.
Happy HFI-680 owner for several weeks now. :-)
Paired with my E6 amp with the blue light EQ setting brings out the mids. I never listen to it without the amp.
Looking for an upgrade amp that can work while charging.
Congratz fba...I believe the O2 amp would be right up your alley...
Cheers!!!
Thanks for the welcome HeatFan12 and TrollDragon. :-)
I will look up the C&C BH. The O2 has been on my shortlist for a while.
Honestly I was very hesitant to order the 680 it but I'm very glad I did. I came across the youtube videos by Dave Rat and that convinced me to order it.
Got it for 120 new @ Amaz..

Thanks for the welcome HeatFan12 and TrollDragon. :-)
I will look up the C&C BH. The O2 has been on my shortlist for a while.
Honestly I was very hesitant to order the 680 it but I'm very glad I did. I came across the youtube videos by Dave Rat and that convinced me to order it.
Got it for 120 new @ Amaz..
Great buy indeed...![]()
IMO, the HFI-680 and PRO650 get lost in the shuffle with all their models....Folks either go one down or one up and forget the sweet spot...lol
Cheers!!!
Used together with my $18 ELE Dac from the other thread. (Not yet connected)
This is my portable office rig too (windows7).
how is the sig pro compared to edition 8s in terms of rock music, complex passages and fast electronic?
Small update on my channel imbalance issues; I definitely decided it wasn't my ears or my source. I ran a lot of tests flipping the channels and listening in mono, and the left was always dominant. Repeated tests with my sound level meter confirmed the left was definitely louder on many frequencies, sometimes as much as over 5 decibels. (Surprisingly, the right side was louder on a few frequencies as well.)
I'm in contact with Ultrasone (specifically a nice lady named Julia, she seems to be in Germany), and I just let her know that I would like to move forward with fixing this problem. Wish me luck.






Exactly... on both of those points.
Sold my Pro 900 because I really want a light weight, open Headphone.
I tried the HD 598- but it sounds muffled. It doesn't have the big open sound I'm looking for.
Not as clean as the Ultrasone IMO.
50% Music
50% Home Theater
Can anyone recommend the 2900?


Small update on my channel imbalance issues; I definitely decided it wasn't my ears or my source. I ran a lot of tests flipping the channels and listening in mono, and the left was always dominant. Repeated tests with my sound level meter confirmed the left was definitely louder on many frequencies, sometimes as much as over 5 decibels. (Surprisingly, the right side was louder on a few frequencies as well.)
I'm in contact with Ultrasone (specifically a nice lady named Julia, she seems to be in Germany), and I just let her know that I would like to move forward with fixing this problem. Wish me luck.
Did you exchange the earpads from left to right? Maybe one pad is defect.
I actually tried that first, because the right ear pad did seem a little under stuffed. But switching them had no discernible effect.