does Cyrus amp need a load?

[tempus fugit]

Hey all;

My brother has a Cyrus amp that he would like to use a wireless headphone
set with. Trouble is, there's no headphone jack, so I was going to rig
something up where he could unplug the speakers and plug the wireless
transmitter into the speaker jacks. I'm pretty sure the amp is solid state.
Would there be any problem with this arrangement, or do you think the amp
needs a low impedance (8 ohms or less) load to run safely?

Thanks