Hi guys!
Build the amp and have an issue. It works great with the Audeze sine 18Ohm but distorts and low frequencies with the 35ohm focal elegía. I tested with 18R and 35R load and confirmed the 35R load produces distortions at the lower frequencies. So I cheated and placed a 18R resistor on each output on parallel and the focal sounded great as well.
I have done a version with irf610/9610
And a Fairchild version with the FQP’s
Both have same issue.
For op amp I used the opa1611
Schematics is same as original, only went lower on negative feedback to 3K because it had too much gain
Any help appreciated
Build the amp and have an issue. It works great with the Audeze sine 18Ohm but distorts and low frequencies with the 35ohm focal elegía. I tested with 18R and 35R load and confirmed the 35R load produces distortions at the lower frequencies. So I cheated and placed a 18R resistor on each output on parallel and the focal sounded great as well.
I have done a version with irf610/9610
And a Fairchild version with the FQP’s
Both have same issue.
For op amp I used the opa1611
Schematics is same as original, only went lower on negative feedback to 3K because it had too much gain
Any help appreciated