Check on ebay.
There are tons of them
Which 990's do you have exactly ?
Pro or Premium and what is their impedance ?
I Just may go with 770 pro 80 ohms considering that they will probably require the amp the least and also save me 50$ to spend on an amp maybe ?
Any suggestion for which amp to choose for 770 pro's so that i can control the bass when in game and not when am listening to music
I have the DT990 Pro (250 Ohm).