Author Topic: distortion  (Read 7 times)

observer

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distortion
« on: Today at 02:17:37 AM »
Hi, I'm new to this so I truly apologize if this has been covered. I searched the forum but didn't find a clear answer to this.

I bought my preenfm2 prebuilt, second hand. I absolutely love this thing! The build seems legit and everything functions as it should and firmware is up to date. There's the slight 15khz noise that others have mentioned. That I can live with for now, and soon I will attempt the mod to deal with that.

But I'm experiencing a noticeable fuzz on pure sine waves. Even with the gain turned down, running a single op sine wave, there is a little hairiness that is driving me nuts. It's not noticeable with other waveforms or on complex patches, but it's definitely there. I'll try to post an audio recording soon. Just wanted to see if anybody had any quick info on the matter.

served

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Re: distortion
« Reply #1 on: Today at 09:16:56 AM »
See if you are delivering enough voltage to the unit. Voltage Overhead distortion.

See if you have a correct opamps used.
See if you have the same distortion with a 9V PSU.
It might be related to many different things, but theese will be a first easy check.



observer

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Re: distortion
« Reply #2 on: Today at 11:02:43 AM »
thanks for the tip, I'll give it a try.  :)