the only one with 5 volts that can go in my vehicle is $1500 and it still requires a modified fit
Make a cheaper one fit. I guarantee you that the first time you crank the volume on any 4 volt rca output it will sound like utter trash. Even the hoodnogs will be laughing at you
https://www.crutchfield.com/g_462250/Touchscreen-Radios.html
Mind finding me one, bud?
I don't know what vehicle you have
Quick fix get an old style but new build rca in out equalizer. The one I have takes a 2 v input and boosts it to 9 v.
Those are an option but not as good as a true 5v from the stereo
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