bumpzors  

Hello, I have a FiiO E10 and recently bought an O2 amp to power my Sennheiser HD 650. I'm probably not doing the HD 650's justice, but that's all I can afford.  My concern is how I connect the E10 with the O2.  Can I just use a 3.5 to 3.5mm jack to connect the two through the E10's line out and...

You guys both have different opinions :[  Not sure which one to believe.  Another question I have is if the jump from the Sennheiser HD 595 to HD 650 is significant.  Any ideas or comments?

Can anyone tell if the FiiO E9 + E10 combo is enough to power the HD 650?

I have the HD 595 and was looking for an upgrade.  I heard the HD 595 was similar to the HD 598.

If I do decide to go for the HD 650, would it be a good idea to get the E9 + E10 combo if the E10 alone doesn't provide enough power? Thank you for suggestions

I already have the FiiO E10 and I wasn't planning on buying more headphone equipment.  Would there be a better high-end headphone that would pair up perfectly with the E10?  I am personally a fan of Sennheiser's headphones because I've owned 4 different cans from them and I love the sound stage...

Not sure what your comment is supposed to mean.  Sorryz

Just wondering if the E10 is capable of powering the HD 650 adequately.  Any ideas?  Some say that it's barely enough, which I am entirely fine with, but others say that you need an amp that's at least $1000.  Thank you.

Thank you all for the help.  Anyone think that I should get DT990? 

How do you even interpret those graphs?  What is amplitude?  Sorry, new to this type of stuff,

Are the 595's considered decent bass?  People always say that sennheisers are weak on bass.  I haven't tried any other brands so I can't really judge.  The other day I was looking at Beyerdynamic's DT 770, 880, 990 and they pretty much look the same and have the same technical data.  Why is...

OO ****. Did not expect so many responses.  Thank you all for the info.    Do you guys have any suggestions on what headphones I should get next?  Currently using Sennheiser 595 with one of those E5 FiiO amps.  Not sure what I should get next but I really do like the sound stage that...

So I've been looking at many different headphones and I do not understand how you would determine which one is better than which.  For example, the Sennheiser HD 280 Pro has a frequency response of 8Hz -  25KHz whereas the Sennheiser HD 555 have a frequency response of 15Hz - 28KHz.  Many say...

Alright thanks. I was thinking about selling the HD 448's.  I've owned them for pretty much 1 year and have kept them for in good condition for the most part.  Does anyone know how much I should sell them for. Amazon sells new ones for one hundred dollars.