Yup. But when running HPs, it will never never come on cuz the amp won't ever even become warm to the touch.
When driving speakers like my Klipsh which are high efficiency, it doesn't bother come on either.
If both amps are at 12 and you are getting the sound quality you like. Leave it. That's about right.
Often, the amp will be open up all the way and the preamp acts as volume control but the Mini-X has too much pwr to do that and will have noise/hum issue with HE500. With speakers, you won't have noise issue but volume control on WA7 will be limited.
Edited by koiloco - 11/2/13 at 10:19pm