[orgishscream]

hello. i am looking for a headphone amp for my sennheiser hd 25 II-1. prefere to amps with replaceble bateries and good sound quality. I am ready to spend about 150 $. waiting for you offers :j

 

[fabio-fi]

The Fiio E7 does a good job with mine. 

 

[teetee66]

I would recommend a used Ray Samuels Audio.  All models work well and have never given me any issues.  Good Luck! 

 

[zoqi]

Fiio has some great value amps.
 
Don't get the E7 though if you don't need the DAC.
The E11 would be better as a pure amp.  
 
Though, if your budget is around 150$ try finding something used. 

 

[fusedpro]

It sounds like you are looking for a portable amp, so as others have suggested, FiiO makes some quality products. http://www.head-fi.org/forum/thread/566432/wts-fiio-e11 is an E11 for pretty cheap if you don't mind the slight cosmetic blemish.
 
If you need a DAC, though, the E7 works nicely. The amp isn't as nice as the E11, but with the E7, you can buy an E9 later on if you need a desktop amp and hook the two together for a pretty killer combo at little cost.

 

[fabio-fi]

 
Quote:

. but with the E7, you can buy an E9 later on if you need a desktop amp and hook the two together for a pretty killer combo at little cost.

Yeah, thats the advantage of getting the E7. 

 

[orgishscream]

i am focused on RSA amps. can you tell me witch of his amps would be optimal for hd 25 . Lets say i could spend more then 150$.

 

[orgishscream]

RSA Mustang P-51. What do you fink about ?