99
7 posts
Aug 14, 2010
4:10 PM
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I just bought a ms57 off of ebay and it is not anywhere near as loud as my 545 or JT-30. I am using the same amp and the same cord. If I remember, I had to rewire the 545 from a low Z to a high Z. Do I have to do the same for the ms 57? There are no instructions with this mic. I would hate to think it is a bad mic.
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barbequebob
1127 posts
Aug 14, 2010
6:00 PM
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All SM57`s are low-z mics and what you need is a good line matching transformer to convert it to hi-z.
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Sincerely,
Barbeque Bob Maglinte
Boston, MA
http://www.barbequebob.com
CD available at http://www.cdbaby.com/cd/bbmaglinte
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rharley5652
216 posts
Aug 14, 2010
6:06 PM
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The Shure SM 57 is a low impedance Microphone Rated impedance is 150 Ohms,..so it's low Z only,.
Never heard of a ms57,. maybe a typo?
It should be as loud or close to ya 545,..maybe the element is weak<> try Hosa MIT-435 Impedance Transformer XLR Female to 1/4" M / ebay Item number: 140396547236
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Simply Unique Kustom Mic's By Rharley
Last Edited by on Aug 14, 2010 6:09 PM
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Greg Heumann
709 posts
Aug 14, 2010
6:16 PM
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You are using the same cord as for your JT30. That is the problem.
That cord is for a high impedance mic, AND expects its signal on Pins 1 and 3 of the XLR connector. The SM57 is low impedance and outputs its signal on Pins 2 and 3 of the XLR connector. You have no connection to pin 2 at all with your cable.
You need a standard low impedance mic cable that is XLR at BOTH ends, and an impedance matching transformer at the amp end of the cable - that will plug into the end of the cable and provides BOTH wiring conversion AND impedance matching, and will provide the 1/4" plug you need to plug into your amp.
With all that said, many SM57's on eBay are impostors made in China and don't sound the same.
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/Greg
Last Edited by on Aug 14, 2010 6:18 PM
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99
8 posts
Aug 15, 2010
7:06 PM
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Thanks guys for all the information. I appreciate your honesty and patience.
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blueswannabe
58 posts
Aug 15, 2010
8:13 PM
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Greg, where do you get these transformers by the way for future reference. Thanks.
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