basic electronics question

When it says no load, does that mean speaker is disconnected?

<<< EDIT>>> I believe Solid state guitar amps can be run with no loads as opposed to tube amps that REQUIRE a load. My old CATV maintenance trainer told us to never energize an amplifier/repeater with no load.

Again, I'm better with electrical than electronics but considering that the speaker, either internal or external is the load on the MOSFET's, I can't see how you would set the source current as there is no path through the pair with the speaker disconnected. As to no load, I am not familiar with the controls on that particular amp but my guess would be that there shouldn't be any bass connected to the amp when the source current is adjusted. What I would do is power it up with the speaker connected and no input and see what you have for voltage. If you are close to the 5 mv, you are golden, if not, well then you have to regroup. Just one step at a time.