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Fiio E9 detailed review and measurements

post #1 of 15
6/22/11 at 4:17pm
Thread Starter 

 

What bothers me is the high output impendance , I thought my 8ohm soundmagics sounded "wrong" plugged into the e9's 3.5mm socket.

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post #2 of 15
6/22/11 at 6:32pm

E9, for all its intention, is really designed for hard-to-drive headphone in mind. I have another DAC / AMP with the same TPA6120 chip, and it has about the same output impedance issue driving low impedance headphone and IEM. Hence why E9 and E7 are meant to pair together. One handles high impedance headphone while the other handles the low impedance stuff.

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post #3 of 15
6/22/11 at 6:51pm

You will not get wrong to input your 8 ohm Soundmagics into E9, The output impendance will not affect the SQ it is only to decrease the output power in case it damage your earphone.

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post #4 of 15
6/24/11 at 7:15am
Thread Starter 

The graphs in the review suggest otherwise, the 3.5mm has a 43ohm output plugging in a 8ohm earphone it will mess up the frequence responce.

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post #5 of 15
6/24/11 at 7:35pm

The reason is that the loader is not " pure resistor ", the real headphone/earphone includes resistor, capacitor and inductance.

 

A resistor connect to a capacitor or inductance will change the frequency response. 

 

BTW ,  the 10 ohms resistor is the design request by the TI. it is for safe.  

 

What I means is consider the headphone/earphone as a pure resistor.  

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post #6 of 15
7/17/11 at 9:55am

Would you suggest the E9i for the AKG240mkII's (55ohm, 91dB spl/V)


Edited by DomieMic65 - 7/17/11 at 9:56am
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post #7 of 15
7/17/11 at 7:12pm
Quote:
Originally Posted by DomieMic65 View Post

Would you suggest the E9i for the AKG240mkII's (55ohm, 91dB spl/V)



I am not sure, but it will be ok if you only want to enough volume, but sometime you want better SQ and it also depend on your taste of the SQ.

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post #8 of 15
7/21/11 at 3:29pm

well finally I ordered it and it is on its way... I will post my impressions when I get it and burn it in for some hours..

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post #9 of 15
7/21/11 at 8:36pm

Thanks for your support to FiiO, hope you will like it as other people.

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post #10 of 15
7/24/11 at 2:06pm
Quote:
Originally Posted by DomieMic65 View Post

well finally I ordered it and it is on its way... I will post my impressions when I get it and burn it in for some hours..


well, you will be very happy! enjoy

 

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post #11 of 15
7/25/11 at 6:44am

a few hours ago I got the E9i and it is playing since then... in how many hours do you think it will be considered fully broken-in?

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post #12 of 15
7/25/11 at 6:51pm

you means burn-in ? 100 hours is enough.

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post #13 of 15
7/26/11 at 12:04am
Quote:
Originally Posted by feiao View Post

you means burn-in ? 100 hours is enough.


:)))) yes ... burn-in

Thank you!

 

 

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post #14 of 15
7/27/11 at 12:45pm
Thread Starter 

My E9 sounded good out the box, and after 100+ it still sounds the same, it's a solid state amp there is no burn in.

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post #15 of 15
7/27/11 at 4:12pm
Quote:
Originally Posted by JRG1990 View Post

My E9 sounded good out the box, and after 100+ it still sounds the same, it's a solid state amp there is no burn in.



mine after 30 or so hours does not sound the same... right after out of the box was quite mechanical and harsh sounding but now it has improved a lot...

ok it isn't in any kind mellow, "musical", sweet... etc etc.. I would just say accurate for now... I think more accurate than my phones :)

More specific impressions after some more hours... for sure it makes me want to buy more phones..

 

Is anybody using it with Fisher Audio FA003 or FA011???

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