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Portaphile 627 Review - Page 5

post #61 of 81
1/18/13 at 2:17pm
I believe it is soldered in as the pictures in first page of this thread. However, you can request Cesar to use screw on terminals like what I did with mine. Since I live overseas, I reasoned that it is too impractical for me to ship it back and front just to replace the batteries. I'll just be ordering just batteries in the future smily_headphones1.gif

Also I suggested to Cesar that using a terminal/socket would help the PCB (reliabilty and performance) in the long run since you not anymore soldering/desoldering (heat stress). Not sure though, if Cesar would make the use of a terminal a permanent design to his amp smily_headphones1.gif
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post #62 of 81
1/18/13 at 11:25pm
Quote:
Originally Posted by xnuthecaveman View Post

I believe it is soldered in as the pictures in first page of this thread. However, you can request Cesar to use screw on terminals like what I did with mine. Since I live overseas, I reasoned that it is too impractical for me to ship it back and front just to replace the batteries. I'll just be ordering just batteries in the future smily_headphones1.gif

Also I suggested to Cesar that using a terminal/socket would help the PCB (reliabilty and performance) in the long run since you not anymore soldering/desoldering (heat stress). Not sure though, if Cesar would make the use of a terminal a permanent design to his amp smily_headphones1.gif


Awesome thanks for the information!  I will send him an email to see if he would do that for me

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post #63 of 81
1/19/13 at 3:13pm
Quote:
Originally Posted by xnuthecaveman View Post

I believe it is soldered in as the pictures in first page of this thread. However, you can request Cesar to use screw on terminals like what I did with mine. Since I live overseas, I reasoned that it is too impractical for me to ship it back and front just to replace the batteries. I'll just be ordering just batteries in the future smily_headphones1.gif

Also I suggested to Cesar that using a terminal/socket would help the PCB (reliabilty and performance) in the long run since you not anymore soldering/desoldering (heat stress). Not sure though, if Cesar would make the use of a terminal a permanent design to his amp smily_headphones1.gif

Thanks for the heads up.  I contacted Cesar and my Portaphile should be ready by the end of this week or early next week with the screw terminals.  Very much looking forward to it and the dragonfly.

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post #64 of 81
1/19/13 at 3:15pm

I wonder if I can mod the portaphile case or get a custom case made that will allow me to integrate the dragonfly with the portaphile.

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post #65 of 81
1/19/13 at 8:24pm
a custom case is a more do-able option. Not sure how small is the dragonfly, but the current case is i think fully occupied by the amp and one should also consider the heat produced by the portaphile smily_headphones1.gif
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post #66 of 81
1/20/13 at 5:50am
Fair points. How much heat does it produce? The dragonfly is the size of a normal length USB thumb drive not one of the shorter ones from what I have read.
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post #67 of 81
1/20/13 at 6:04am
The stock case feels significantly warm when in operation since it's a class A amp, but Cesar is still the best person to answer regarding the exact amount of heat.
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post #68 of 81
1/23/13 at 4:39pm
I decided to order the odac case to try to get the dragonfly installed in it. Hopefully my 627 will be shipping out soon.
Edited by Poimandres - 1/24/13 at 6:52pm
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post #69 of 81
1/26/13 at 9:40am
Just received notification that my 627 shipped. Should be here on Tuesday.
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post #70 of 81
1/26/13 at 11:16am
Quote:
Originally Posted by ClieOS View Post

Wow, tiny font really hunts my eyes.

Thanks for the review, but it is definitely not helping to show the back side of the PCB where only the battery circuit is visible wink.gif. I assume the three OPA627 and the six BUF634 are on the other, more important side of the PCB. Those chips alone would have cost over $100, so that explains why this is a pretty expensive amp.

 

This is not far off what I am sitting with, albeit 4x 634`s. This would have to sound pretty spot on to cost £200 more.

 

Edit: Price


Edited by Sinth - 1/26/13 at 11:26am
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post #71 of 81
1/27/13 at 12:13pm
Quote:
Originally Posted by Sinth View Post

This is not far off what I am sitting with, albeit 4x 634`s. This would have to sound pretty spot on to cost £200 more.

Edit: Price

I am not sure if I understand where you were going with that.
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post #72 of 81
1/27/13 at 12:15pm
I contacted Cesar regarding the output impedance of the 627 as I ordered a dacport lx to pair with it until the odac's are shipping again from JDS.

If anyone is curious as I do not believe it is stated anywhere, this is what he said:
I measured an output impedance of .09 using a 10 ohm load and .7 using a 322 ohm load.
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post #73 of 81
1/28/13 at 3:13pm
Received the 627 today and it is currently charging. Will update later after I get a chance to spend some time with it.
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post #74 of 81
1/29/13 at 2:24am
the external battery that I bought already arrived, it is able to power the amp even if the portaphile's internal battery ran out smily_headphones1.gif
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post #75 of 81
1/30/13 at 7:30pm

I have created a Portaphile Appreciation Thread http://www.head-fi.org/t/648574/portaphile-appreciation-thread

My first impressions are located there as well.

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