[JamesFiiO]

About the OP BUF of Mont Blanc,
 
We will choose one as the OP BUF for Mont Blanc, but not sure if you guys have special "feeling" about it.
 
BUF634, low power consume , warm sound quality. the specification will not as high as LM49600, the THD is about 0.03%
 
LM49600, special designed for audio, and need almost double power current compare with BUF634, very high specification, the THD is about 0.002%.
 
 
Any suggestion? 
 
BTW, the playtime will be about 15 hours if we use LM49600, and 20 hours if we use BUF634. the charge time is about 7 hours by USB port of PC, or 3 hours by 1.2A USB wall charger. the build battery is a 800mAh/11.1V.

 

[SV_huMMer]

15 hours off battery to me is widely enough not to sacrifice the sound quality. But this is just my humble opinion.

 

[putente]

Quote:

About the OP BUF of Mont Blanc,
 
We will choose one as the OP BUF for Mont Blanc, but not sure if you guys have special "feeling" about it.
 
BUF634, low power consume , warm sound quality. the specification will not as high as LM49600, the THD is about 0.03%
 
LM49600, special designed for audio, and need almost double power current compare with BUF634, very high specification, the THD is about 0.002%.
 
 
Any suggestion? 
 
BTW, the playtime will be about 15 hours if we use LM49600, and 20 hours if we use BUF634. the charge time is about 7 hours by USB port of PC, or 3 hours by 1.2A USB wall charger. the build battery is a 800mAh/11.1V.

 
 
If the E12 features a socketed opamp, this is a minor decision as later it will possible to use other opamps...

 

[ClieOS]

If the E12 features a socketed opamp, this is a minor decision as later it will possible to use other opamps...

Unfortunately, unlike BUF634 which does come in DIP8 package (or SOIC8 on a DIP8 adapter) and can be socketed , LME49600 only comes in non-socketable TO-263 surface mount. So it must be decided early on (*btw. this is just the buffer, not the main opamp).

My vote goes for the LME49600 - 15 hours is still long enough and the spec is superior.

 

[putente]

Quote:

Unfortunately, unlike BUF634 which does come in DIP8 package (or SOIC8 on a DIP8 adapter) and can be socketed , LME49600 only comes in non-socketable TO-263 surface mount. So it must be decided early on (*btw. this is just the buffer, not the main opamp).
My vote goes for the LME49600 - 15 hours is still long enough and the spec is superior.

 
 
Thanks for clearing that! In this case, I also vote for the LME49600...

 

[JamesFiiO]

in term of sound quality, I am worry about people may decide by the OP AMP, BUF634 is a very good and famous op buf in the past years, even it is not designed for Audio first. personally , I will choose the LME49600 too.
 
also I had mentioned before, Mont Blanc will have two version, one is for DIY version which you can change the OP AMP by yourself but we will not provide any warranty and the quantity is limited. hope everyone can understand
 
us because our user may damage the products when they change the OP AMP.

 

[MrScratch]

I vote for Obam... Err... I mean, LM49600.

15 h w/ low power LED would be perfect. Better performance > longer battery life.

 

[JamesFiiO]

Quote:

I vote for Obam... Err... I mean, LM49600.

15 h w/ low power LED would be perfect. Better performance > longer battery life.

 
Mont Blanc came with two LED, one for power on/off and the alarm if there are any DC or over current . one for charge, includes charging, full power, low power status. 

 

[Sherlockaled]

Quote:

 
Mont Blanc came with two LED, one for power on/off and the alarm if there are any DC or over current . one for charge, includes charging, full power, low power status. 

Awesome, this is a very helpful feature !
 
I vote for LM49600 , to me sound is number one priority, however battery and size are also very important. 15hours/charge for the LM49600 imo is a very range for all-day portable already .

 

[MrScratch]

Mont Blanc came with two LED, one for power on/off and the alarm if there are any DC or over current . one for charge, includes charging, full power, low power status. 

Yup, I remember you mentioning that.
So the E12 "LE" will be a special DIY portable amp? Interesting!

 

[mikeaj]

Ah, so you are looking at BUF634 and LME49600... you will not lack for output power then.  I think some people will be excited to be able to use the planar magnetic headphones with these amps.  As for which to choose, I think the circuit designer (you, as a compnay) knows better than us.
 
I don't have a strong feeling about it, but I also suggest LME49600.  It is cheaper, and for marketing purposes, it is better.  If you can get 15 hours runtime, that is already a lot.  If you use your phone as a player (some other devices too), you would need to charge it long before 15 hours anyway.

 

[xp9433]

Quote:

About the OP BUF of Mont Blanc,
 
We will choose one as the OP BUF for Mont Blanc, but not sure if you guys have special "feeling" about it.
 
BUF634, low power consume , warm sound quality. the specification will not as high as LM49600, the THD is about 0.03%
 
LM49600, special designed for audio, and need almost double power current compare with BUF634, very high specification, the THD is about 0.002%.
 
 
Any suggestion? 
 
BTW, the playtime will be about 15 hours if we use LM49600, and 20 hours if we use BUF634. the charge time is about 7 hours by USB port of PC, or 3 hours by 1.2A USB wall charger. the build battery is a 800mAh/11.1V.

Definitely prefer the higher spec LM49600, and 15 hours play time is good.
Is it possible for users to replace the 800mAh/11.1V battery with a higher rated compatible battery - say 1800 - 2200mAh (if available)?
Frank

 

[chesterqw]

LM49600, quality for 15 hours will be enough.
 

 

[jammerlee711]

FYi , the new sony's hpa-1 only last 5hrs btween charges...15hrs,it is over kill, gimme LM49600 !!

 

[phantompersona]

LM49600
 
15 hours is plenty of time and SQ matters most.