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The Objective2 (O2) Headphone Amp DIY Project
The Objective2 (O2) Headphone Amp DIY Project
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Old 21st August 2019, 01:15 AM   #5501
sgrossklass is offline sgrossklass  Germany
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#1 rule of troubleshooting: You shall measure voltages!

Sounds like you might have lost a supply rail or something. Also, a loud pop indicates that there may be substantial DC offset on the output - not good for the cans!

An extensive troubleshooting section has been provided for the O2:
NwAvGuy: O2 Details
I suggest going through the step-by-step DC voltage list backwards, since you are starting from the completed product.
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Old 21st August 2019, 01:26 AM   #5502
44Builder is offline 44Builder  United States
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Thank you. Was working fine (great even!) then not. :/
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Old 21st August 2019, 08:11 AM   #5503
Mooly is offline Mooly  United Kingdom
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The Objective2 (O2) Headphone Amp DIY Project
Follow my guide in post #3775 and see where it falls down.
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Old 21st August 2019, 07:18 PM   #5504
44Builder is offline 44Builder  United States
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Will do - thanks!
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