[Meanstreak242]

My B4-X has a channel imbalance. The left channel is definitely louder than the right channel. (I'm using it single ended out. Tried multiple cables and multiple sources.) Can this be fixed or do I have a defective unit? (I originally planned on swapping out the opamps for the Burson, but I'd rather not sink money into a unit that's not working right.) Should I return it or can I just fix this myself?

 

[fabien32]

My B4-X has a channel imbalance. The left channel is definitely louder than the right channel. (I'm using it single ended out. Tried multiple cables and multiple sources.) Can this be fixed or do I have a defective unit? (I originally planned on swapping out the opamps for the Burson, but I'd rather not sink money into a unit that's not working right.) Should I return it or can I just fix this myself?

There is inside the unit screws for each channel that you can adjust with them the volume ect

 

[Mouseman]

Agree 100%. With the stock unit I couldn't tell there was an imbalance. Once I did the Burson upgrade, I could tell they were off. I adjusted it a slight bit with the screw and it's now dead on.

 

[Yobster69]

My B4-X has a channel imbalance. The left channel is definitely louder than the right channel. (I'm using it single ended out. Tried multiple cables and multiple sources.) Can this be fixed or do I have a defective unit? (I originally planned on swapping out the opamps for the Burson, but I'd rather not sink money into a unit that's not working right.) Should I return it or can I just fix this myself?

As mentioned above, you can adjust this with the little pots on the circuit board, but a word of advise.... take a picture of the board first, a nice close up so you can see how they are set now, just in case you adjust any and do not like the outcome, you can then at least re set them how they were.
Good luck sorting it

 

[Meanstreak242]

Stock opamps it was definitely off. Everything was shifted to the left. It's now fixed however. (Am I correct in assuming the pots on the outside are for opamp gain, and the inner pots are for for tube bias?) I am going to reserve judgement on this until I hear the Burson opamps.

 

[choisan]

how is the difference with b4-x and alo cdm? almost the same circuit? RF noise level? my unbalanced version has a lot of interference when it was placed close to my mobile phone

 

[triggrhaapi]

Not the same circuit, Alo uses different tubes. I'm not sure what op amps they use either. However, modding a B4-x is outrageously cheaper than buying a stock Alo so there's that. RF interference is from the tubes, which are very RF sensitive. I have opted to put the amp in a different pocket, which requires a long jumper but solves the issue. The near field RF of a cell phone is insanely strong.

 

[Hal Rockwell]

Finally got to moding my B4. The goal was to be able to install any opamp and still keep the lid on. It ceased being portable, but it's still transportable, which is what I need - being able to take it to any part of the house and enjoy my music collection.

P.S.
The static is largely affected by the type of opamp being used. Some of which I tried make the static almost inaudible, even with the phone right next to it.

 

[fabien32]

Finally got to moding my B4. The goal was to be able to install any opamp and still keep the lid on. It ceased being portable, but it's still transportable, which is what I need - being able to take it to any part of the house and enjoy my music collection.



P.S.
The static is largely affected by the type of opamp being used. Some of which I tried make the static almost inaudible, even with the phone right next to it.

is the opamp being used is PCS SA-200?

 

[Hal Rockwell]

is the opamp being used is PCS SA-200?

SparkoS

 

[fabien32]

SparkoS

and what can you say about the sound? (i have a feeling PCS SA-200 is really amazing )

 

[LaughMoreDaily]

Is the b4-x better than the b4? I have the b4 and I was thinking if I made the right choice because the price difference is almost 40%.

I'm curious as well. Good question.

 

[Hal Rockwell]

and what can you say about the sound? (i have a feeling PCS SA-200 is really amazing )

I spent just a couple of minutes listening to it, but right off the bat, I can say that I found it a bit treble aggressive for my taste, and a little hollow in the mids.

 

[fabien32]

I'm curious as well. Good question.

It is a little bit better specially if you have balanced headphones, but the upgrade of the omps is doubled

 

[maxcaovn]

Mine B4X also experiencing channel imbalance. But after 10mins playing, it balanced again.