Hi, recently I made bold move, trying to use Homepod Gen 1 woofer to make my very first active speakers. The project from my design stage till now it gone to more than five month. (I works on it during the weekends)
Here are some basic specs:
Class-D amplifier: Chinese DIY Duo chips Infineon 12070
Player: Chinese DIY player board
Amplifier Power supply: DC 12V, 13A
Player power supply: DC 5V 2A
(All power supply I install in different chamber from speaker)
Audio signal wire use: Shield wire with both shield end attached to ground.
Corssover design: DIY
After I painstakingly assembling all the components and hundreds of wiring soldering. I plugged into the power socket, thankfully, there is no explosion and all functions normally.
But there just one thing that bothers me is this speaker keep having ziiiiii, hummmm, Siiiiiii, Giiiii sounding, I can easily hear it when the amplifier volume turns to 50%, when in 100%, it is more noticeable.
I am not sure what it causing the problem. The player, Amp, wiring, shielding or what other?
Should I use BBQ aluminum foil to cover my amplifier and player so to reduce the EMI? Or should I use aluminum foil to wrap the audio signal cables and separate them from tie them together with the power cables?
What should I do to illiminate EMI? I still dont want my project gone into the junk bin.
Any suggestion or advise are welcome.
Thanks.
Here are some basic specs:
Class-D amplifier: Chinese DIY Duo chips Infineon 12070
Player: Chinese DIY player board
Amplifier Power supply: DC 12V, 13A
Player power supply: DC 5V 2A
(All power supply I install in different chamber from speaker)
Audio signal wire use: Shield wire with both shield end attached to ground.
Corssover design: DIY
After I painstakingly assembling all the components and hundreds of wiring soldering. I plugged into the power socket, thankfully, there is no explosion and all functions normally.
But there just one thing that bothers me is this speaker keep having ziiiiii, hummmm, Siiiiiii, Giiiii sounding, I can easily hear it when the amplifier volume turns to 50%, when in 100%, it is more noticeable.
I am not sure what it causing the problem. The player, Amp, wiring, shielding or what other?
Should I use BBQ aluminum foil to cover my amplifier and player so to reduce the EMI? Or should I use aluminum foil to wrap the audio signal cables and separate them from tie them together with the power cables?
What should I do to illiminate EMI? I still dont want my project gone into the junk bin.
Any suggestion or advise are welcome.
Thanks.
