Chosen Solution
I bought a marantz sr 5500 and I am not getting sound from my right front speaker port.
alexreams, if you already checked the speaker, you will have to disassemble your Marantz and work your way backwards through the schematic. Checked to see if there are any components that look missing or scorched or otherwise damaged. You will need a multimeter for that. Start at relay RY64
It’s most likely an issue with the speaker itself if it’s only one speaker. You can find replacements online. You might as well check drivers and wires.