MISTERY SOLVED! "Customer: Is SM57 OK for vocals? Shure: Yes, it can work very well on LOUD singers. But if you're looking for a vocal mic, you may want to look at a condenser microphone first. Any type of dynamic mic, like the Shure SM57 or SM58, contains a voice coil that is very susceptible to picking up the hum field. Nothing can be added to these mics to control this. Some dynamic mics like the Shure SM7B contain an internal hum-bucking coil that reduces hum pick-up. Reduces, not eliminates. Other dynamic mics, like the Shure Beta 58A, have more effective shielding around the voice coil that also reduces hum. ALL dynamic mics will pick up this hum field to some extent. Condenser mics, like the Neumann or the Shure KSM mics do not have voice coils. These mics will perform much better in a hum field. But many of these mics have output transformers that, like a voice coil, will also pick up the hum. If the hum field cannot be eliminated, stick with high-quality condenser mics with transformerless outputs. Shure KSM mics are condenser mics with transformerless outputs." www.shure.com/en-US/performance-production/louder/whats-that-noise-and-how-to-fix-it
MISTERY SOLVED!
"Customer: Is SM57 OK for vocals?
Shure: Yes, it can work very well on LOUD singers. But if you're looking for a vocal mic, you may want to look at a condenser microphone first.
Any type of dynamic mic, like the Shure SM57 or SM58, contains a voice coil that is very susceptible to picking up the hum field. Nothing can be added to these mics to control this.
Some dynamic mics like the Shure SM7B contain an internal hum-bucking coil that reduces hum pick-up. Reduces, not eliminates. Other dynamic mics, like the Shure Beta 58A, have more effective shielding around the voice coil that also reduces hum. ALL dynamic mics will pick up this hum field to some extent.
Condenser mics, like the Neumann or the Shure KSM mics do not have voice coils. These mics will perform much better in a hum field. But many of these mics have output transformers that, like a voice coil, will also pick up the hum.
If the hum field cannot be eliminated, stick with high-quality condenser mics with transformerless outputs. Shure KSM mics are condenser mics with transformerless outputs."
www.shure.com/en-US/performance-production/louder/whats-that-noise-and-how-to-fix-it