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Sjors-Sjimmie
0
Aug 20, 2019
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Hello there, I connected my just delivered 02+SDAC to my laptop via the usb port and connected my HD6XX via the headphone port on the front side, but I do not hear anything. When I put a AMP in between I hear the music faintly but with much noise. Is it broken or am I doing something wrong? Thanks in advance
Aug 20, 2019
Michael-Q
243
Aug 21, 2019
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Sjors-SjimmieI'm no expert but you could check/try these things. I assume you plugged both the usb cable and power jack in. Do you have the right transformer/power brick for your country? 120 AC to 12'ish AC if used in the US. 220 AC to 12'ish AC if used in the EU. Does the DAC work by itself? Can you feed the signal to another device?
(Edited)
Aug 21, 2019
Sjors-Sjimmie
0
Aug 22, 2019
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Michael-QWell I used the transformer that came with the package. That's the right one for my country. I contacted a friend for another transformer with the same output. Will c if that works. I am not sure, but when you hear some music between the noise, I would think the powersource isn't the problem. You don't need to use the red/white jacks on the back right? Thank you for your time.
Aug 22, 2019
Michael-Q
243
Aug 22, 2019
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Sjors-SjimmieThe red/white rca jacks in the back aren't needed for how I think you're using it. I mentioned the power source stuff because I wanted to make sure you weren't doing something odd. Being it's a plug and play device for the most part, I'd assume it's defective. I'm just giving you ideas to try but ultimately I'm not going to be a lot of help. But there are things you can try to see where the problem is. The O2 amp/dac is two devices in one. Does the amp work if you feed it a signal through the rca's (red/white jacks in the back) with the usb unplugged? Does the dac work if you send the signal to another device through the rca's? It sounds like you tried this and the dac does not work in this scenario but figured I'd mention it because I wasn't sure entirely what you wrote ("put an Amp in between"). Side notes about the power source comment: If you used an EU transformer in America, the transformer would be supplying 7'ish Vrms instead of 12-15 Vrms. Voltage regulators inside the amp would try to regulate to +/-12V but since it's well below where it wants to be it chokes or severely limits the current flow. The severely limited current flow might sound like how you described it - lots of noise with faint amount of actual music. If you used a US transformer in EU it'd probably blow up all the filter caps instantly which would of course be very bad. I'm not sure how the amp would behave if that happened but I was fairly confident that wasn't what you described.
(Edited)
Aug 22, 2019
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