Learner
Well-known member
Don't intend to spread any voodoo or nothing but I was wondering if anyone has experienced with certain tubes that seem to portrait sound "better" than others?
From my own limited experience, I have found that certain tube seems to alter or in my case "enhance" the stereo image(eg. make the sound bigger and wider) and I guess it would have something to do with the frequency response of the tube. However, I have sweep the tube on the CRO and the signal indicated a fairly flat freq response with hi freq rolloff around 14khz.
Which lead me to believe that it might be the non linear charracteristic of the gm curve, however I tried to bias the tube at different point to see if that'll change the audible perception and got the same result from the same tube. So far I have yet to experience the same "enhancement" from other tubes, can anyone suggest any other testing method to test the tube??
From my own limited experience, I have found that certain tube seems to alter or in my case "enhance" the stereo image(eg. make the sound bigger and wider) and I guess it would have something to do with the frequency response of the tube. However, I have sweep the tube on the CRO and the signal indicated a fairly flat freq response with hi freq rolloff around 14khz.
Which lead me to believe that it might be the non linear charracteristic of the gm curve, however I tried to bias the tube at different point to see if that'll change the audible perception and got the same result from the same tube. So far I have yet to experience the same "enhancement" from other tubes, can anyone suggest any other testing method to test the tube??