[jacknight]

Quote:

 
The design will be more easy if we use build in li-ion battery like C421. the power is boost from +/ 3.7V.  
 
In E12, the power supply does not need any boost and without any convert.  in SR71X, the power is supply by 2 9V battery, that is one important reason that
 
they have very high sound quality. 

 
so E12 will have great power, just say, do you think it will drive HD650 well? 

 

[mikeaj]

Quote:

so E12 will have great power, just say, do you think it will drive HD650 well? 

 
Maybe this is for FiiO to answer, but just for reference, with 6 AAA li-ion 10440 batteries, E12 could theoretically reach the power levels of the E9.  It depends on the output they design.
 
As for driving certain headphones well, I don't really like that phrasing.  It depends on how loudly you listen, your expectations, and your preferences.  For many purposes, one could say that the E11 already drives the HD 650s very well, or even the E6.
 
 
 
 
 

Is this kind of potentiometer is acceptable ? it can help control the thickness, we are worry about the quality of such kind of potentiometer. 
 
 

 
Are you worried about mechanical quality or electrical quality?  I think that a sturdier, higher-performance option with better tracking is important for a product above $100.  An Alps, as originally mentioned, should probably be okay.

 

[jacknight]

Quote:

 
Maybe this is for FiiO to answer, but just for reference, with 6 AAA li-ion 10440 batteries, E12 could theoretically reach the power levels of the E9.  It depends on the output they design.
 
As for driving certain headphones well, I don't really like that phrasing.  It depends on how loudly you listen, your expectations, and your preferences.  For many purposes, one could say that the E11 already drives the HD 650s very well, or even the E6.
 
 
 
 
 
 
Are you worried about mechanical quality or electrical quality?  I think that a sturdier, higher-performance option with better tracking is important for a product above $100.  An Alps, as originally mentioned, should probably be okay.

 
i mean not only loudness but also it can make the headphones "sing"

 

[JamesFiiO]

Quote:

 
so E12 will have great power, just say, do you think it will drive HD650 well? 

 
OK, I agree with tzjin, products should answer your question when it is released . lol 

 

[JamesFiiO]

Quote:

Are you worried about mechanical quality or electrical quality?  I think that a sturdier, higher-performance option with better tracking is important for a product above $100.  An Alps, as originally mentioned, should probably be okay.

 
We are very careful not to take any risk because the quantity we sell is a big number so even 1% have problem it will be disaster to us. also it is not so convenient as the potentiometer installed in E10/E11/E9. 

 

[JamesFiiO]

Quote:

 
i mean not only loudness but also it can make the headphones "sing"

 
Yes, loudness does not means everything, but if the output is so poor, will have problem to drive some headphones. The best way is select amp depend on what you need, some famous amps can only puch out
 
very small power but it does not means it is not a great amps. but to FiiO, we will like to make a portable amp with " huge " output power, slim size, in affordable price.  

 

[OK-Guy]

how about bi-amping internally?... my home-system is bi-amped & bi-wired which results in better definition of bass & treble... could this work in a portable set-up?

 

[sashaw]

Quote:

 
The design will be more easy if we use build in li-ion battery like C421. the power is boost from +/ 3.7V.  
 
In E12, the power supply does not need any boost and without any convert.  in SR71X, the power is supply by 2 9V battery, that is one important reason that
 
they have very high sound quality. 

2 9v batteries as power source would be great. We all don't need to worry about how many charges can the li-ion battery take. Personally, I don't like amp circuit with boost up voltages. Not to mention most good portable amps, such as, stepdance, LISA III, L3, etc., all takes 9V batteries.

 

[bowei006]

how about bi-amping internally?... my home-system is bi-amped & bi-wired which results in better definition of bass & treble... could this work in a portable set-up?

Are you talking of two different internal dual op amps? If so then fiio on their previous designs generally use a pre amp and then main driving amp aalready.

 

[OK-Guy]

Quote:

Are you talking of two different internal dual op amps? If so then fiio on their previous designs generally use a pre amp and then main driving amp aalready.

it would be like a pre-amp and two main amps... one for mids & highs and the other for bass, the pre-amp would control things.
 
works real well in my hi-fi set-up and certainly improves definition & soundstage... being quite new to all this I don't know if the same principles would work in a portable amp.

 

[bowei006]

Quote:

it would be like a pre-amp and two main amps... one for mids & highs and the other for bass, the pre-amp would control things.
 
works real well in my hi-fi set-up and certainly improves definition & soundstage... being quite new to all this I don't know if the same principles would work in a portable amp.

I have that kind of setup in one of my amps. However it's more of pre amp and driving amp and "main" amp really for mine.

 

[mikeaj]

Quote:

it would be like a pre-amp and two main amps... one for mids & highs and the other for bass, the pre-amp would control things.
 
works real well in my hi-fi set-up and certainly improves definition & soundstage... being quite new to all this I don't know if the same principles would work in a portable amp.

 
Maybe I'm not understanding you correctly, but if you're talking about one amp for mids/highs and another for bass, what's happening is that one amp is powering the woofers, while the other is connected to the tweeters.  There are two different transducers (drivers; things that move to make sound) each for the L and R channels—one that handles low frequencies and the other that handles the rest.  For headphones, there's only a single driver per ear cup, except in a few rare gimmicky gaming headsets.  You can roughly think of that as acting in parallel.
 
We have a resident panda talking about multiple stages in an amplifier (sections connected together in series).  Pretty much everything that's not a CMoy has multiple sections like that, which work together as a whole.

 

[OK-Guy]

cheers for that... I was kinda thinking that it would be difficult to achieve especially as you have to bi-wired the speakers and amps (two pairs of cables and not the dedicated bi-wire ie 2-4 via a single amp), the problem I saw straight after posting was how to bi-wire the headphones....  I'm learning about all this malarkey so advice & a tad of education is especially welcomed.
 
I'm having some real problems finding a solution to my portable set-up so figured on amp'ing as a way to power better headphones but I don't particularly want to alter the sound or soundstage that comes out of my Walkman-Z1070, I love the almost neutrality of the thing just gotta find the right stuff to go with it, which is turning out to be a bit of a nightmare.

 

[Bocefuss4500]

Definately looking forward to see what fiio comes up with been a customer for awhile like what they put out ....

 

[bowei006]

Quote:

Definately looking forward to see what fiio comes up with been a customer for awhile like what they put out ....

They just finished a design and final sample unit for a new 2.4G Wireless audio streamer..no details yet