Amplifier HT4S and Missing Speakers

[Cyber.Lynx]

I recently received my Fosi HT4S amplifier. 1 pair of speakers is physically unavailable at the moment. I want to hook up 1 pair to test the unit's funcionality, but I am concerned that running the unit without the second pair attached may damage the amp.

Is this concern warranted? If not, how long could I use the amp in this configuration?

Thanks,
Cyber Lynx