Same phone and headphones here.  You won't be satisfied with the volume without an amp.

Got the 439 2 days ago and burned them in for about 30 hours.  Bass was slightly lacking for my taste so I did the mod removing the tape from just one of the holes.  The sound is exactly where I wanted it now.  Thanks for the pictures.  I had read up on how to do it before purchasing them but...

Another quick question.  I just had the left earphone audio cut out from my pc.  I immediately checked to see if it was working on my phone and my chromebook and everything sounded fine.  Then, I reset my computer and when it booted back up everything was fine again.  Is it safe to assume this...

Hey man.  Just wanted to let you know that I was in the same boat as you a few weeks ago.  I use the s3 as well, and it simply can't power the 80 ohm version.  As soon as I added an amp I could pump the volume and bass so loud that people sitting next to me get headaches.  You will be shocked at...

Thanks for your help.  It's bad music quality without a doubt.  The music is all on google play music because I love the free storage.  I tried the troublesome songs out of a few different sources and on my old ear buds and I could hear the imperfections, the 770's are just making the issue more...

Thank you.  I have double checked all of the cables and everything seems in fine working order.  The amp isn't brand new, it's been sitting around for a while in it's original packaging, but had never been used before I got the headphones.  I do not think it's the cables or the headphones...

Hello everyone, and let me thank you in advance for you help.  I recently purchased the DT 770 Pro/80 as my first pair of non 7-11 purchased headphones.  I would like to use them mainly for portable use around my house and running errands, as well as long trips and flights.  My main source will...

Thanks for the quick reply on New Years Day, I appreciate the help.  I think I'll go ahead and order a pair.

Can I drive the hfi 680 off of a cell phone without a portable amp?

Can I drive the hfi 680 off of a cell phone without a portable amp?