Quote:
Originally Posted by
garytube
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I purchased three SM57’s within the last two months. One from Amazon, and the other two from Sweetwater very recently. I just tried the two new 57’s and they have noticeable hum at full preamp gain. I then tried the Amazon one, and the same thing. I compared all these to a 57 that I had purchased a year or two ago. No hum, or very very slight. An absolutely noticeable difference. These were tested using the same pre, cable, position, and gain in the comparison.
There you have it folks, it is the microphones after all, in this case.
OP purchased his 57 at least eight years ago. So if you’re saying new 57s hum and older ones do not, that doesn’t hold. If 57 hum is random, then hard to tell. I’ve had many 57s over the years, never noticed a hum in any of them. But then, I never use a 57 on a soft source, causing me to have to dime the preamp gain. Usually use them on sources like snares and guitar amps.
But in 29 considerate responses, OP never got back with anyone, so…