Millet TV 3 host how to connect non-millet subwoofer?

This post is intended to make an exchange with friends who have idle subwoofers at home and also like hands-on activities. It can also be considered as recycling waste and making a small contribution to environmental protection.
The external subwoofer must be an active subwoofer (that is, with its own amplifier). Prepare a 2.5mm change three joints, a multimeter.
2.5mm a change of three heads, as shown below:
The lines purchased may be slightly different and can be distinguished using a multimeter.
The following is a description of the connection steps:
Insert the 2.5mm head into the millet console, and insert the white lotus head into the active subwoofer (that is, tap the share and whitehead). Now the subwoofer has started to sound. This step is not required to be recognized by the millet host.
After the above process, the subwoofer starts to work, but the bass of the host audio of the millet is still sounding at the same time. To solve this phenomenon, we must further improve it to achieve the effect we want. Here's how to do it:
Prepare a 20K resistor to the common and red head (cut the red lotus head and connect the resistor)
After this process, the bass of the subwoofer millet connector is no longer connected. The low frequency sound is completely emitted by the subwoofer. The millet host can also correctly recognize the subwoofer and can set the output parameters of the subwoofer.
After this post is over, I hope to help everyone.
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