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Using a portable headphone amp with low impedance IEM's - Should I need to?

post #1 of 2
Thread Starter 

Hi there, this is my first post here. I'm quite new to the world of audiophiles so please excuse any ignorance I may show in my questions. 

 

I own a pair of V-Moda M-100's and also a pair of Audio-Technica ATH-IM70's. I use the IM70's mainly for their ease of portability. I am hoping to get a portable headphone amp and have been looking at the Fiio E07K portable headphone amp. It's within my price range and has had some very decent reviews. When I'm out, I mainly listen to music on my smartphone (Samsung S3). If at home then I use my computer. 

 

My question is, do I really need the portable headphone amp for the IM70's? From what I've read on these forums, I think my M-100's may benefit from the E07K. However, what I'm concerned with is that the specs of the E07K list the headphone impedance range as being 16 Ohms - 100 Ohms,  where as the IM70's have an impedance of 10 Ohms. Will using the E07K with these IEM's damage them in any way? Will it even make a difference in audio quality if they can be used? 

 

Also the IM70's have a listed maximum input power of 200mW. The E07K has a listed output power  of > 220 mW@32Ω /> 250 mW@16Ω.Will this also be an issue if I use them together?

 

Thanks in advance for any replies XD

post #2 of 2
Quote:
Originally Posted by Kphyre View Post
 

Hi there, this is my first post here. I'm quite new to the world of audiophiles so please excuse any ignorance I may show in my questions. 

I own a pair of V-Moda M-100's and also a pair of Audio-Technica ATH-IM70's. I use the IM70's mainly for their ease of portability. I am hoping to get a portable headphone amp and have been looking at the Fiio E07K portable headphone amp. It's within my price range and has had some very decent reviews. When I'm out, I mainly listen to music on my smartphone (Samsung S3). If at home then I use my computer. 

My question is, do I really need the portable headphone amp for the IM70's? From what I've read on these forums, I think my M-100's may benefit from the E07K. However, what I'm concerned with is that the specs of the E07K list the headphone impedance range as being 16 Ohms - 100 Ohms,  where as the IM70's have an impedance of 10 Ohms. Will using the E07K with these IEM's damage them in any way? Will it even make a difference in audio quality if they can be used? 

Also the IM70's have a listed maximum input power of 200mW. The E07K has a listed output power  of > 220 mW@32Ω /> 250 mW@16Ω.Will this also be an issue if I use them together?

 

The E07K will not damage the 10-Ohm IM70 with normal use, unless you yourself choose to turn up (max out) the volume all the way on the E07K.

How much will the E07K amplifier improve the audio quality of the IM70s? not sure.

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