MXL 770 Producing A Horrible Screeching Sound

  • Thread starter Thread starter CheenoDash
  • Start date Start date
Mr Clean said:
On high gain, for cheapish gear, that's sounds pretty normal to me. Could you post a file of you talking, singing or playing guitar with a lower gain? Maybe a couple set at a quarter, half, etc.

I'm not hearing a bad 'screech' like the OP leads us to believe, more background noise. I have an MXL990 and on high gain it is a noisy little shit, regardless of the preamp I use. Low gain, close mic'ing, I can get some sweet recordings out of it with little to no background noise.

Do you have all your equipment running on the same power outlet?
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It's the same with lower gain as well, just quieter. The interface is powered via USB.
 
moresound said:
Then it could very well be a faulty microphone. Especially if it works for a few seconds then goes into screaming mode.
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I didn't realise this is the guy who had an unbalanced XLR cable for a while.
I wonder if Stewart (xaudia) is about? Maybe he could tell us what happens when there's only +48v on one side of a balanced line?
 
The phantom power supply fixed this, and the mic sounds great! :D
 
CheenoDash said:
The phantom power supply fixed this, and the mic sounds great! :D
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Well I'll be danged.
What was the interface again that was trying to provide the proper phantom.
Only want to know so that we can put it on the future *watch out* list.
 
moresound said:
Well I'll be danged.
What was the interface again that was trying to provide the proper phantom.
Only want to know so that we can put it on the future *watch out* list.
Click to expand...

He said it was the Tascam US-200 (?) - must be an older model?
My first thought would be that the USB supply is not providing enough current.
 
Yeah, Tascam US-200. I'll get a new multimeter asap and test. I'm really relieved that finally all of my foolish errors are resolved haha. Cheers for the help guys :)

The interface was second hand as well, so it could've already been damaged by something. I should've bought new, I know, but being on student living money makes it hard to buy new stuff haha.
 
If you purchased the interface through eBay you are entitled to a full refund.
 
I like the write up about having to sit on the unit to warm it up. That's being right on top of things. :D
 
arcaxis said:
This is what I thought was the problem with my Tascam US-144mkii, but it did the same thing on different computers on different USB ports (all 2.0). A powered USB hub worked, but I had seen a few recommendations to not use an interface on a hub (not sure why).

When I had the problem I had found these....
Is Your Tascam US-144 mkII Noisy? Just Sit on it. « Because I am Here
https://homerecording.com/bbs/gener...ording-computers/noise-problems-again-331015/
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Powered USB hubs are generally pretty bad for more complex electronics. You can quite easily kill your computer's power supply if you buy a cheap one and aren't careful. I don't bother with them, learnt how bad they can be from experience.
 
moresound said:
If you purchased the interface through eBay you are entitled to a full refund.
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It works now, and I like the interface. I got it really cheap as well, so I don't really want to risk paying more.
 
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