a few days ago I received the package containing the upgrade of the V6 vivid op amps for the creative Zxr sound card, from the first moment I mounted the op amps on the card I felt a drop in volume in a right channel, I made several attempts to invert the 4 op amps in sequence but one op amp is weaker than the other 3 I don’t know what the problem is, I would like to ask what can be done? (I signed with the marker to recognize it). The only solution I have adopted now has been to reassemble the two lm358 op amps behind and the two V6 Vivid forward