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TOPIC: usbstreamer + minidac8 + Pwr Cycle = Saturation

usbstreamer + minidac8 + Pwr Cycle = Saturation 3 years 4 months ago #32277

  • darpmalone
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Hi guys,

I'm hoping someone can assist. I just received my new MiniDAC8, which I'm using with the USBStreamer for a 3way active xover. Everything seems to work as expected until I power cycle the DAC. Any sound after power cycling are 100% saturated out of all 8 outputs (So loud, I believe it stopped my heart for a second). Luckily I was able to pull the power before frying my mids and tweets.

Ever since it happened the 1st time, I've been testing with some cheap powered computer speakers, however I can re-produce this problem every time I turn the DAC off and back on... If I unplug the USB cable from the USBStreamer before powering up the MiniDAC8 things go back to normal

I have a linear regulated 5v supply powering the miniDAC8 and the ministreamer is taking it's 5v from the USB bus.

Does this have something to do w/the low current bus power being fed to the MiniDAC from the USBStreamer, causing it to not fully power cycle? Is there a way to disable the USB bus power to the USBStreamer so that both units get clean power from the linear supply (exclusively), and therefor power cycle together?

Thanks
Last Edit: 3 years 4 months ago by darpmalone.
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usbstreamer + minidac8 + Pwr Cycle = Saturation 3 years 4 months ago #32384

  • devteam
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@ darpmalone

I believe that you already have a tech support ticket opened with our team? They already followed up, easiest to keep it to one thread. THanks.

DevTeam
miniDSP, building a DSP community one board at a time.
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usbstreamer + minidac8 + Pwr Cycle = Saturation 3 years 4 months ago #32397

  • darpmalone
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devteam wrote:
@ darpmalone

I believe that you already have a tech support ticket opened with our team? They already followed up, easiest to keep it to one thread. THanks.

DevTeam

Yes and your team has helped, indeed. For anyone who may experience the same issue I'll post the solution here.

Per MiniDSP DevTeam:

"Please have a trial at desoldering that diode here on the USBStreamer (leave empty pad). It will solve your issue I think."




I'm happy to report that this has indeed resolved my problem. As a matter of fact the noise floor is now greatly improved as well.

Thanks for your help

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