Hi all,
This is my first post here so bare with me as I’m a somewhat newbie when playing with electronics. So I noticed my Pass Labs X250 seemed to be running on the cool side and not really getting warm to the touch. So after reading a ton on the subject I decided to adjust the bias a little using this forum and a couple other places as a guide.
I adjusted the bias pots to make both heat sinks hold at about 48 degrees which is stated in the manual for this amp. I then read to adjust the differential and absolute dc offset before putting everything back together t make sure everything is on the up and up. This is where I have run into a problem.
I successfully set both differential offsets to 0 plus or minus a few mv but when moving onto the absolute offset I only got the right channel to go down close to 0. The left channel with the pot turned all the way is only going down to about 1500mv or 1.5v. Does anyone have an idea where I may have messed up?
By the way I performed all adjustments after replacing the lid and letting things settle, trying to avoid temp swings.
Thanks for any help.
This is my first post here so bare with me as I’m a somewhat newbie when playing with electronics. So I noticed my Pass Labs X250 seemed to be running on the cool side and not really getting warm to the touch. So after reading a ton on the subject I decided to adjust the bias a little using this forum and a couple other places as a guide.
I adjusted the bias pots to make both heat sinks hold at about 48 degrees which is stated in the manual for this amp. I then read to adjust the differential and absolute dc offset before putting everything back together t make sure everything is on the up and up. This is where I have run into a problem.
I successfully set both differential offsets to 0 plus or minus a few mv but when moving onto the absolute offset I only got the right channel to go down close to 0. The left channel with the pot turned all the way is only going down to about 1500mv or 1.5v. Does anyone have an idea where I may have messed up?
By the way I performed all adjustments after replacing the lid and letting things settle, trying to avoid temp swings.
Thanks for any help.