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Light moments! - Page 2

post #16 of 23

I can't say; I've never used the E11. It seems to be a popular portable amp on here though. Just search the form a bit and I am sure you will find some opinions. I used my SR225's straight out of the Sansa clip as my portable setup and was happy enough with it for that purpose. In general Grado's don't improve that significantly as other (harder to drive) headphones do by upgrading the amplification as they are already easy to drive.

 

This is what I mean with impedance matching btw. See how the I+ can deliver more power into 32 ohms than the MKIII?

 

Little-Dot I+
150mW @ 300 ohms
300mW @ 120 ohms
800mW @ 32 ohms

 

Little-Dot MKIII
350 mW @ 300/600 ohm
300 mW @ 120 oh
100 mW @ 32 ohm


Edited by Jasper9395 - 11/17/13 at 10:45pm
post #17 of 23
Quote:
Originally Posted by Jasper9395 View Post
 

I can't say; I've never used the E11. It seems to be a popular portable amp on here though. I used my SR225's straight out of the Sansa clip as my portable setup and was happy enough with it for that purpose. I did use it with my desktop dac/amp a little from time to time but it never got much use as I owned several higher end (not so portable) headphones at the same time.

 

 

I used to listen to my SR60's straight from my iPod Shuffle. Pretty amazing how good budget-fi can be.

post #18 of 23
Quote:
Originally Posted by Jasper9395 View Post
 

I hate to disappoint you but you should probably have bought the Little Dot mk1. This amp is better with the 32ohm Grado's. Impenitence matching is key... That being said you are on the right track though. the mk1 is supposed to have very good synergy with Grado's.

 

Hi. Thanks for your response.

 

You're not disappointing me. Yes, I am well aware of this suggestion, however I already have other amps available and will likely have other headphones so I made the decision to try the pure tube amp rather than a hybrid like the Mk1. I also took note of comments from other members regarding Mk3's and Grado's despite the limited output of the Mk3 into 32ohm impedance headphones and it is generally positive, some a lot more than that. I suspect it will be just fine for my needs, if not, I will move it on. It's a pretty cheap way of experiencing a good tube amp.

 

Oh, and the Little Dot Mk3 Reference Guide (pdf) says:

 

Quote:
 Recommended Load Impedance: 32 ohm~600 ohm

 

Grado's are (just) within recommended loads...

 

Looking at a recent post on the JDS C5D thread, specifications for mw required to generate 115dB based on headphone sensitivity were shared:

 

Quote:
 
dB/mW ↓ Power (mW) Required for 115dB
94 125.9
97 63.1
100 31.6
103 15.8
106 7.9
109 4
112 2
115 1
118 0.5

 

According to the manufacturer specs, Grado SR225i are 98dB per mw. I'm sure there is more to it than just the numbers but the point is that there should be adequate output for reasonable listening levels.

 

Mike


Edited by maf_au - 11/18/13 at 2:17am
post #19 of 23
Thread Starter 
So based from that data, will the Fiio E11 do the job? I don't know really the E11 specs. smily_headphones1.gif

Thanks.


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post #20 of 23

Yes.

 

The Fiio E11 has Output Power > 180 mW@32Ω according to the specifications page at Fiio.

 

Mike

post #21 of 23

The Little Dot arrived and it's awesome.

 

The difference between the computer output and the same computer output through the Little Dot is amazing, and much, much more than I expected. I have the gain on standard (3) and getting good listening levels at 6 on the dial for most recordings. Computer output is also on about 6/10, not sure what the ideal setting is, but no complaints here.

 

Still waiting for the ODAC, It will be a week or so yet. Very interested in the changes that will bring compared to the 2010 Mac Pro built in output.

 

Mike.

post #22 of 23

Good stuff, I am sure you will get another big improvement when your DAC arrives. Enjoy!

post #23 of 23
Thread Starter 
Quote:
Originally Posted by maf_au View Post
 

Yes.

 

The Fiio E11 has Output Power > 180 mW@32Ωaccording to the specifications page at Fiio.

 

Mike

 

Thanks! You made me happy by stating it! :)

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