Plug n play 4channel amp? RCA?

[GambleGarage]

Has anyone tried one of these small 4channel plug n play amps yet?

Additionally anyone know if the factory radio will allow a plug n play harness for RCA outputs? Similar to this: https://www.crutchfield.com/S-s3n6i...QLu7Gh4IpBejaJr80iwZaxDRCoYrWbwRoC5EgQAvD_BwE

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[Darnon]

Most decent amps these days will support direct line level input. That Alpine appears to for instance.