consider Audioengine D1. a Good option for Desktop. It plays an obviously better sound than the standard computer sound. The gain is enough for loud listening. It will definitely improve the drying of music/movies/games. The Beyerdynamic DT 990 works perfectly. Checked and tested

I have tried the audioengine D1 does drive them well. I'm really impressed with how these sound. Therefore, I recommend it. I've heard just as many good things about Mayflower Objective-2. If someone is interested in other options, I recommend reading the review on this topic

My top amps FOR Sennheiser hd650: 1. DarkVoice 336SE 2. Schiit Modi 3 3. Topping A30. The first tube amplifier! check out the Review on them