Nope, this is using an app on my iPhone. I don't like the Realtek EQ. It volume-normalizes your sound in real time, which destroys your music. For example, if you boost the bass, your song will be louder during bass-light parts, and softer during bass-heavy parts, so that it's always the same average volume. Makes no sense at all. In my iPhone EQ apps, the overall loudness is decreased when EQ is on to prevent clipping, but at least the decrease is consistent.
What app are you using for EQ?