[Roller]

Right now I'm in doubt between waiting and getting an E11 to replace my PA2V2, or getting an Audinst HUD-MX1 to replace both the PA2V2 and my Audio 2 DJ.
 
Any thoughts?

 

[JamesFiiO]

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Quote:

Main features:
 
1, Replaceable battery ( compatible with NOKIA BL-5B)
 
2, working voltage: +/- 4.5V or +/- 6V;
 
3, Voltage Gain: 10 dB;
 
4, Volume control:  Alps potentionmeter;
 
5, OP: AD8397;
 
6, Output power: >150mW;
 
7, Case: Aluminium alloy!
 
8, Playtime: 10 Hours!
 
9, ETA: March, 2011
 
 
We may show the engineer sample of E11, in the hong kong Headphone Festival 2010~2011 ( Jan 8, 2011)

Is that > 150 mW per channel, or total?

It is about 180-200mW /Channels at @16ohms, and AD8397 have high current output ( in fact, it is op+buf inside AD8397).  that is why it used in some famous portable amp!

 

[BlackbeardBen]

Quote:

Quote:

Quote:

Main features:
 
1, Replaceable battery ( compatible with NOKIA BL-5B)
 
2, working voltage: +/- 4.5V or +/- 6V;
 
3, Voltage Gain: 10 dB;
 
4, Volume control:  Alps potentionmeter;
 
5, OP: AD8397;
 
6, Output power: >150mW;
 
7, Case: Aluminium alloy!
 
8, Playtime: 10 Hours!
 
9, ETA: March, 2011
 
 
We may show the engineer sample of E11, in the hong kong Headphone Festival 2010~2011 ( Jan 8, 2011)

Is that > 150 mW per channel, or total?

It is about 180-200mW /Channels at @16ohms, and AD8397 have high current output ( in fact, it is op+buf inside AD8397).  that is why it used in some famous portable amp!

Okay, wow!  So there's tons of headroom for peaks with that chip, since it's capable of 310 mA peak output - the current supply of the battery/power supply is the limit then (you can only feed it an average of about a third of that [111.8 mA at 16 ohms at 200 mW (an average of 1.7885 V)], if my quick estimate is correct).
 
I'm not that familiar with power supplies and voltage converters - is the the E11 capable of providing the maximum current all the way to the maximum +/- 6 V voltage swing?  If so it would seem it can put a whole lot of power into medium impedance headphones; perhaps enough for portable use of the more power-hungry orthodynamics.  (Hey, I can hope, right?!?)
 
As I start looking at this I'm beginning to see how truly complicated the design and output of an amplifier can be...

 

[JamesFiiO]

Quote:

I was planning to get an E7.
 
Is it worth holding off and waiting for the E17? If so, how long left?

 
Before the end of this year, and E17 can't compare with E7 because it is at least double the price of E7!  you should buy one depend on your demand and your budget!

 

[JamesFiiO]

Quote:

Quote:

Quote:

Quote:

Main features:
 
1, Replaceable battery ( compatible with NOKIA BL-5B)
 
2, working voltage: +/- 4.5V or +/- 6V;
 
3, Voltage Gain: 10 dB;
 
4, Volume control:  Alps potentionmeter;
 
5, OP: AD8397;
 
6, Output power: >150mW;
 
7, Case: Aluminium alloy!
 
8, Playtime: 10 Hours!
 
9, ETA: March, 2011
 
 
We may show the engineer sample of E11, in the hong kong Headphone Festival 2010~2011 ( Jan 8, 2011)

Is that > 150 mW per channel, or total?

It is about 180-200mW /Channels at @16ohms, and AD8397 have high current output ( in fact, it is op+buf inside AD8397).  that is why it used in some famous portable amp!

Okay, wow!  So there's tons of headroom for peaks with that chip, since it's capable of 310 mA peak output - the current supply of the battery/power supply is the limit then (you can only feed it an average of about a third of that [111.8 mA at 16 ohms at 200 mW (an average of 1.7885 V)], if my quick estimate is correct).
 
I'm not that familiar with power supplies and voltage converters - is the the E11 capable of providing the maximum current all the way to the maximum +/- 6 V voltage swing?  If so it would seem it can put a whole lot of power into medium impedance headphones; perhaps enough for portable use of the more power-hungry orthodynamics.  (Hey, I can hope, right?!?)
 
As I start looking at this I'm beginning to see how truly complicated the design and output of an amplifier can be...

Yes, you are right, in fact, most of time is spend on design a decent power supply! in fact, for any portable device, the power management is very important!

 

[JamesFiiO]

Quote:

Feiao ~ is there any chance of a head-fi pre-group buy

Maybe, but the question is we are worry about some bugs of the trial-production ! so usually we will have trial sales in some special regions first, and them start mass production!
 
at that time, there are not means for any pre-group buy, I guess that will be more suitable for some expensive product!

 

[Coupe]

Quote:

Quote:

Feiao ~ is there any chance of a head-fi pre-group buy

Maybe, but the question is we are worry about some bugs of the trial-production ! so usually we will have trial sales in some special regions first, and them start mass production!
 
at that time, there are not means for any pre-group buy, I guess that will be more suitable for some expensive product!

I would be interested in a trial, if it will help. 

 

[psuwanchote]

i would be too
and is the definite release in March 2011?

 

[sysfail]

 
Quote:

Quote:

I was planning to get an E7.
 
Is it worth holding off and waiting for the E17? If so, how long left?

 
Before the end of this year, and E17 can't compare with E7 because it is at least double the price of E7!  you should buy one depend on your demand and your budget!

Is it possible that the E17's amp could be more powerful or as powerful as the E9 amp?

 

[Riku540]

Quote:

Is it possible that the E17's amp could be more powerful or as powerful as the E9 amp?

It is my understanding that the E17 will still connect to the E9's dock, which would mean no, and no again.

 

[sysfail]

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Quote:

Is it possible that the E17's amp could be more powerful or as powerful as the E9 amp?

It is my understanding that the E17 will still connect to the E9's dock, which would mean no, and no again.

Haha ok. Well I think I'll just stick with the E7/E9 combo then.

 

[USCdeacon]

hey feiao! 
 
I know you guys are well past the design stage, but in the event that changes can still be made, can the headphone in/out ports be switched?
 
Most iPod + LOD users will have the LOD coming out the middle of the player, and plugging it into the outer "3.5mm/source in" might cause it to cross paths with a headphone cable plugged into the more medial, "3.5mm/headphone out" part. This can cause clutter and inconvenience when trying to plug in/out of the E11 while keeping the DAP in tact with the E11 via LOD.
 
In short, I feel like the headphone out should always be lateral to the source/3.5mm in. 
 
I'm not sure if I'm coming across clearly here.  Does anyone understand what I'm trying to say?

 

[JamesFiiO]

Yes, I know what you want to tell us! but unfortunately!  it can be solved by add a switcher, but it will make the design rather complex and make the sound worse!
 
Because you have to make the input/output cross over! and take quite big space on PCB for layout!
 
the line in socket of  E11 is in the middle, so don't worry about that!

 

[kingpage]

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the line in socket of  E11 is in the middle, so don't worry about that!

So the design on the first page for the E11 is not completely correct, since it says the middle is "out". Is that what you are saying here?

 

[JamesFiiO]

Yes, the picture is not the final design! but it is very close to final version!