Since I just had it open I started to listen to it a bit for the last 1 hour. I wouldn't call it bass heavy - just definitively not bass shy. I also am using the 840 pads on it.
It's not a Ultrasone Pro900 and might not have the cleanest bass of them all, but it's fun, the texture is good, the highs are still very detailed. For the price of this headphone a very capable performer. If the mids would be a bit more forward they would be amazing. Better than I remembered and since I bought a few more expensive ones recently (T90, Momentum) I realize how good these cans actually are. And I also realized they have a removable cable (face palm) I had no idea after owning them for 2 years.