[TrollDragon]

The tube rolling thread will probably be your next stop...

 

[Audiofanboy]

Yup, TD speaks the truth. I definitely wouldn't use x3 and x4, as it both sounds bad and and requires a little too much volume on the dial to get to comfortable levels.
 
I do recall Little Dot recommending the highest gain for high impedance cans (300 ohms +) like the HD650, so I think you could safely lump a 250 ohms headphone in the same category.
 
Way back when I got the MK IV SE paired with the Senn HD650, I had spent time with both x5 - when I was using the unit as an occasional preamp - and x10, and eventually settled for x10 since it gave me the best sound; imho of course, since some find the highest gain - lowest feedback - setting to be too thin, but I find it more realistic and natural.
 
So, yeah, try it out and report your findings!

 

[Wicked world]

Thanks for the input! 

 
I'm gonna spend this evening trying out x5 and x10 and see which I like best!

 

[HFoletto]

Hello, how are you?

I bought a Little Dot IV SE 1 year ago used from a forum member.
When I receive it was working quite fine and how I wish.

However several months later the left channel started sound louder than the right one. I tried switch the power tubes of place and nothing. The same happened with the driver tubes.

What could be the problem and how to fix it?
I use other amp with the same source and this problem does not happen.

Thank you for reading, have a great day.

 

[rosgr63]

Hello.
 
Check if the gain switches are set the same on both channels.

 

[HFoletto]

Hello there!

Thank you for the reply, I really appreciate it.
Well, I'm not sure how to check it, so I took a photo of how it is now: http://i.imgur.com/zoO2bO0.jpg
Sorry for the low quality picture.
 
So, are the switches right?

Thank you again.

 

[rosgr63]

Sorry I can't be of more help, I need to check my amp first to be sure.

 

[MIKELAP]

  Hello there!

Thank you for the reply, I really appreciate it.
Well, I'm not sure how to check it, so I took a photo of how it is now: http://i.imgur.com/zoO2bO0.jpg
Sorry for the low quality picture.
 
So, are the switches right?

Thank you again.

your gain switches look to be  the same on each channel . you said you changed around your power tube and you have same problem and also driver tube and problem is still there in left channel did you try other tubes then the ones originally on the amp to see if same problem.

 

[HFoletto]

  your gain switches look to be  the same on each channel . you said you changed around your power tube and you have same problem and also driver tube and problem is still there in left channel did you try other tubes then the ones originally on the amp to see if same problem.

 
Well, I haven't tried any other tube, just the ones that came with it.
I'm afraid to buy those tube new and the problem persist. They aren't cheap though.

It's really weird because the problem started suddenly..

Thank you for the reply!

 

[MIKELAP]

   
Well, I haven't tried any other tube, just the ones that came with it.
I'm afraid to buy those tube new and the problem persist. They aren't cheap though.

It's really weird because the problem started suddenly..

Thank you for the reply!

but you did change around the power tubes and driver tubes .what driver tubes are you using in your amp .Also the jumpers on your amp are they positionned ok if you have a EF95 type tube both jumpers should be on EF95 setting thats about all i can think off let me know

 

[HFoletto]

  but you did change around the power tubes and driver tubes .what driver tubes are you using in your amp .Also the jumpers on your amp are they positionned ok if you have a EF95 type tube both jumpers should be on EF95 setting thats about all i can think off let me know

Yes, I changed the power tubes and the driver tubes around.
Those are the tubes I'm using:
Driver Tubes: 2x JAN 5654
Power Tubes: 2x Soviet 6H30EH

Thank you again.
 

 

[MIKELAP]

  Yes, I changed the power tubes and the driver tubes around.
Those are the tubes I'm using:
Driver Tubes: 2x JAN 5654
Power Tubes: 2x Soviet 6H30EH

Thank you again.
 

Last thing i can think of is check the jumper settings under the amp below the gain setting in other holes if mk4 is similar to mk3  the jumpers should be on EF95 SETTINGs since you are using 5654 tubes 

 

[HFoletto]

  Last thing i can think of is check the jumper settings under the amp below the gain setting in other holes if mk4 is similar to mk3  the jumpers should be on EF95 SETTINGs since you are using 5654 tubes 

Hmmm, I tried to take pictures of the other 2 holes but it's so hard to see and even more to take a picture. I tried my best, here they are:
http://i.imgur.com/fv2YKmb.jpg
http://i.imgur.com/ChmXe6c.jpg

What do you think?

Thank you again.

 

[MIKELAP]

  Hmmm, I tried to take pictures of the other 2 holes but it's so hard to see and even more to take a picture. I tried my best, here they are:
http://i.imgur.com/fv2YKmb.jpg
http://i.imgur.com/ChmXe6c.jpg

What do you think?

Thank you again.

Heres a picture if im not mistaken this should be on  EF95 setting   is your jumper placed like that .just checked your pictures again looks like they are well placed                                

 

[MIKELAP]

So maybe its a solder joint  thats not wright i dont know .sorry but cant help you more