QUOTE(Alberto.Contador @ Sep 12 2017, 05:26 PM)
Is it not something to do with interference? I doubt the power itself could have creeped in and induce hissing noises.
Nah, it ain't interference, hybrid battery is faraday caged in aluminium casket. BT is also quite a resilient protocol. When BT transmitter runs on battery, it 100% loses the hiss. It's confirmed audio ground loop.
So, either I spend RM60-90 on some 3.5mm audio ground isolator or charge then run the BT transmitter.
It's currently:
Phone --1.5meter [3.5mm to RCA]--> miniDSP --1.5meter [RCA to 3.5mm]--> BT transmitter
Power supply is:
12V->5V --1.5meter--> miniDSP (audio GND looped below)
12V->5V --0.5meter--> BT transmitter (audio GND looped above)
It's a mess. I'll just charge and run the BT transmitter since it can last for a claimed 15 hours. So that's charge every week with 5+ hours to spare. Ez pz.
Sep 12 2017, 08:50 PM

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