[mumbles]

For what purpose are you rounding?

 

[mumbles]

Thanks for the history lesson. Speaking of history, the answer to your question was stated previously but you seem to have missed it...

https://www.diymobileaudio.com/threads/resistance-2-7-ohm-2ohms-or-3-ohms-voice-coil.466151/post-6246055

The amp you are using employs a RIPS power supply which means it makes rated power anywhere from 1.5 ohms to 4 ohms. So, regardless of whether you round up or down, the output will be the same.