Warm up a cd player. He is using a low voltage starve plate. Aphex and a few other companies use low voltage rather than 150v to 250v. He plays up the safe factor. I would think a high end builder of tube gear would use some voltage. I had a peavey VMP . Talking on the phone to a tech to help me fix it.Got a frickin big shock off a capacitor I touched like a fool.