Need help, Mono or Stereo Setting for HU/Sub?

[tracyrick 10+ year member]

I have an Alpine CDA-9813. Also a 500/1 mono amp and a 12w6v2 subwoofer. I have RCA cable going from the HU to the amp, and then speaker wire from the amp to the sub.

My HU has an option of "Stereo" or "Mono" for the subwoofer output setting.

My first guess is Mono, but with RCA cables from the HU, am I actually putting out a stereo signal? Very confused...

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[3.5Max6spd 10+ year member]

The 500/1 is a mono amp, with L/R inputs that likely sum the signal mono. To avoid any sort of affect from the HU signal you should keep it 'stereo' outputs and let the amp sum the signal.

 

[tracyrick 10+ year member]

You were right! Amp sums up stereo signals to mono per manual, thanks. Need to read the manual like the bible I guess, thought I'd done that.