It will work, with a 20V supply you´ll get some 20W into 8 ohms, not bad at all.
Remember output is balanced, so no output terminal is grounded, use a plastic jack.
It´s a common beginner´s mistake to use a metallic guitar speaker jack, screwed on chassis.
Remember output is balanced, so no output terminal is grounded, use a plastic jack.
It´s a common beginner´s mistake to use a metallic guitar speaker jack, screwed on chassis.