RE_SWC Car Stereo Volume Knob Kit: Compatibility and Features
Summary
This article describes a plug-and-play volume knob kit (RE_SWC) for car stereos. It addresses compatibility issues with different headunit brands: JVC forces incremental volume control on select models (no bypass found), Kenwood has similar limitations but a firmware bypass is implemented (may vary by unit), and some Android headunits don't support USB volume control (fallback to resistance SWC mode is available). The kit appears to be a DIY/aftermarket solution for adding physical volume control to car audio systems.
Source
bskyRE_SWC Car Stereo Volume Knob Kit: Compatibility and Featureslectronz.comKey quotes
· 3 pulledJVC forces incremental volume control above certain values on select models. I am yet to find a way to bypass this.
Kenwood forces incremental volume control above certain values on select models. I have found a way to bypass this and have implemented it by default in the firmware.
Some Android headunits do not allow USB volume control. If that is the case with your unit, you can default back to using the resistance SWC mode of this kit for control input
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