Bert 1100
Super Member
Hi all,
After reading about these 4-Pole power supply caps, I decided to give them a try.
I was looking here and there about how to connect them, since the schematics on Mundorf's site do not include the actual markings found on the caps themselves, making it unclear.
I found the thread by Flaxmill19 about his 140, where he drew up a wiring diagram : http://audiokarma.org/forums/index....0-stereo-power-amp-–-restoration-work.562617/
So I wired it up like this in a Scott A457 I'm restoring for someone. It works perfectly well, but I still had doubts so I shot an email to Mundorf directly, and they replied within an hour.
AND IT SEEMS WE GOT IT WRONG......
Here is the exchange I had with Mundorf :
(Note I've added the pink "WRONG" afterwards so nobody would use the pic as a guide...)
-------------------------------------------------------------------------------------------------------------------------
MY MESSAGE TO MUNDORF:
Hello,
I am using your MLytic AG+ 4-pole capacitors in building and restoring audio amplifiers, and I wanted to be sure I understand properly the way they should be wired.
The schematics given on your web site ( 4-Pole mlytic application note) is very clear, but I have difficulty because the markings on the capacitor ( +in +out -in -out) are not indicated on that schematic.
So I have written in GREEN on the schematics provided on your website the equivalent markings found on the capacitors. Please let me know if I am correct with what I added on the schematics.
If what I have written in green is wrong, please let me know and show me the proper way
To sum it up :
pin 1 = + IN
pin 2 = - OUT
pin 3 = + OUT
pin 4 = - IN
Is that correct ?
Thank you, your help is much needed and appreciated !
Bertrand Métrailler
Switzerland
------------------------------------------------------------------------------------------------------------------------------
THE ANSWER FROM MUNDORF :
Dear Mr. Métrailler,
Hoping this pinout drawing is helpful for you.
The unmarked and set back pin is Out-.
Transferred to the application note this means:
1. IN+
2. IN-
3. OUT+
4. OUT-
Kind regards,
Mirko Filke
Head of Sales & Supply Chain
Mundorf EB GmbH
----------------------------------------------------------------------------------------------------------------------------
SO ! I got it wrong and it seems some of us as well.
This means the minus poles need inverting, so yes it does work fine but is not optimal and as intended by the manufacturer.
I'll be rewiring the amp I did. About its sound before and after I will not check, since It's in the middle of the restoration work.
Hope this is useful and helps !
After reading about these 4-Pole power supply caps, I decided to give them a try.
I was looking here and there about how to connect them, since the schematics on Mundorf's site do not include the actual markings found on the caps themselves, making it unclear.
I found the thread by Flaxmill19 about his 140, where he drew up a wiring diagram : http://audiokarma.org/forums/index....0-stereo-power-amp-–-restoration-work.562617/
So I wired it up like this in a Scott A457 I'm restoring for someone. It works perfectly well, but I still had doubts so I shot an email to Mundorf directly, and they replied within an hour.
AND IT SEEMS WE GOT IT WRONG......
Here is the exchange I had with Mundorf :
(Note I've added the pink "WRONG" afterwards so nobody would use the pic as a guide...)
-------------------------------------------------------------------------------------------------------------------------
MY MESSAGE TO MUNDORF:
Hello,
I am using your MLytic AG+ 4-pole capacitors in building and restoring audio amplifiers, and I wanted to be sure I understand properly the way they should be wired.
The schematics given on your web site ( 4-Pole mlytic application note) is very clear, but I have difficulty because the markings on the capacitor ( +in +out -in -out) are not indicated on that schematic.
So I have written in GREEN on the schematics provided on your website the equivalent markings found on the capacitors. Please let me know if I am correct with what I added on the schematics.
If what I have written in green is wrong, please let me know and show me the proper way
To sum it up :
pin 1 = + IN
pin 2 = - OUT
pin 3 = + OUT
pin 4 = - IN
Is that correct ?
Thank you, your help is much needed and appreciated !
Bertrand Métrailler
Switzerland
------------------------------------------------------------------------------------------------------------------------------
THE ANSWER FROM MUNDORF :
Dear Mr. Métrailler,
Hoping this pinout drawing is helpful for you.
The unmarked and set back pin is Out-.
Transferred to the application note this means:
1. IN+
2. IN-
3. OUT+
4. OUT-
Kind regards,
Mirko Filke
Head of Sales & Supply Chain
Mundorf EB GmbH
----------------------------------------------------------------------------------------------------------------------------
SO ! I got it wrong and it seems some of us as well.
This means the minus poles need inverting, so yes it does work fine but is not optimal and as intended by the manufacturer.
I'll be rewiring the amp I did. About its sound before and after I will not check, since It's in the middle of the restoration work.
Hope this is useful and helps !
Last edited: