Excellent microphones..I have 2 of them. They use the same element as the 575M6 but don't have the tone control. They offer clean, crisp articulate audio - BUT - if you turn the gain up more then about 25% you will pick up a lot of background noise. I run mine at about 20% gain w/50% gain on the radio and have no problem with background noise. The only 'drawback' are the 7.5 volt batteries - kinda hard to find and expensive. An alternative is to use 5 button batteries stacked in the battery holder - easy to find and not as expensive.
Excellent microphones..I have 2 of them. They use the same element as the 575M6 but don't have the tone control. They offer clean, crisp articulate audio - BUT - if you turn the gain up more then about 25% you will pick up a lot of background noise. I run mine at about 20% gain w/50% gain on the radio and have no problem with background noise. The only 'drawback' are the 7.5 volt batteries - kinda hard to find and expensive. An alternative is to use 5 button batteries stacked in the battery holder - easy to find and not as expensive.