Hi
my commercial amp was deliverd without Miller compensation capacitor CDom at the VAS transistor (and is stable). I have experimented with lowering the global NFB and the result soo far is promising, the result was decreased (!) distortion at higher freq. The bass however became a bit more diffuse.
My thoughts now are to revert to the original (higher) NFB and to add a small CDom (<100pF). Thereby more of high-freq negative feedback will be locally at the VAS stage. Can this reduce global NFB at high freq. without sacrifying the bass performance.
Are the sonic drawbacks with "CDom feedback" too large, should I drop the idea or try it?
/ BR Tomas F. Stockholm
PS please excuse my language DS
my commercial amp was deliverd without Miller compensation capacitor CDom at the VAS transistor (and is stable). I have experimented with lowering the global NFB and the result soo far is promising, the result was decreased (!) distortion at higher freq. The bass however became a bit more diffuse.
My thoughts now are to revert to the original (higher) NFB and to add a small CDom (<100pF). Thereby more of high-freq negative feedback will be locally at the VAS stage. Can this reduce global NFB at high freq. without sacrifying the bass performance.
Are the sonic drawbacks with "CDom feedback" too large, should I drop the idea or try it?
/ BR Tomas F. Stockholm
PS please excuse my language DS
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