I use a CD as a mirror, a magnifier with a handle, and Petzl's best head lamp made for night climbing-- all multi-purpose tools that do the job, assuming good eyesight. At close magnification you can see two images of the cantilever down into the mirror, which helps in determining correct line of sight.
Azimuth observations and importance
After adjusting azimuth with a Fozgometer loaned to me, the following is what I observed. Individually, these changes were subtle although noticeable. The combined effect however, was significant to the overall presentation.
Imaging improved.
Vocals became more focused, not as big and wide as before.
Instruments more detailed with greater air. Location is more precise.
Tighter bass versus the slightly lingering bass notes previously.
Better top to bottom detail and clarity.
I never realized how important correct azimuth adjustment is and this exercise was quite a learning experience for me. Thinking I was correctly adjusting azimuth by visually setting the headshell as level as possible was a reasonable but flawed attempt.
I have found at least two stylus issues that if present will affect azimuth and sound.
1) A straight cantilever that is twisted left or right changes the attitude of the diamond and its relationship to the groove. By twisted I mean the cantilever has rotated on its own axis. This one is very difficult to see without appropriate magnification.
2) A cantilever that is canted to the left or right a degree or more but is still straight, not bent. It points left or right probably because it was not centered correctly when the cantilever was installed. It also changes the attitude of the diamond.
What is probably basic and common knowledge to everyone here is something I have just been enlightened about after giving it very little thought. I am now convinced that accurate azimuth is a required step in the turntable set up process and I will be giving full attention to this part of the equation.
No more guesswork and eyeballing which I am embarrassed to say was the norm. Doug
Imaging improved.
Vocals became more focused, not as big and wide as before.
Instruments more detailed with greater air. Location is more precise.
Tighter bass versus the slightly lingering bass notes previously.
Better top to bottom detail and clarity.
I never realized how important correct azimuth adjustment is and this exercise was quite a learning experience for me. Thinking I was correctly adjusting azimuth by visually setting the headshell as level as possible was a reasonable but flawed attempt.
I have found at least two stylus issues that if present will affect azimuth and sound.
1) A straight cantilever that is twisted left or right changes the attitude of the diamond and its relationship to the groove. By twisted I mean the cantilever has rotated on its own axis. This one is very difficult to see without appropriate magnification.
2) A cantilever that is canted to the left or right a degree or more but is still straight, not bent. It points left or right probably because it was not centered correctly when the cantilever was installed. It also changes the attitude of the diamond.
What is probably basic and common knowledge to everyone here is something I have just been enlightened about after giving it very little thought. I am now convinced that accurate azimuth is a required step in the turntable set up process and I will be giving full attention to this part of the equation.
No more guesswork and eyeballing which I am embarrassed to say was the norm. Doug