• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tiny Speaker on a Gilmore JR?

I have a Gilmore Jr. 1/2-watt that I normally run through a home-made cab with a Celestion G10 Vintage.

I'd like to run the output through a DI box (Behringer GI100) into a console without going through the speaker. At the moment I can't really spend the money for an attenuator or dummy load, so I was thinking about using a de-coned speaker coil as a load.

I have a bunch of these 2", 8-ohm "full range" speakers, rated for 15 watts. To the best of my understanding, this should be fine (.5 < 15), but intuition suggests that it's a lot to ask of such a tiny device. The speaker is completely expendable, but I don't want to risk damaging the amp. Is this a reasonable thing to attempt?