So I recently purchased DT880's premiums 250ohm because I was looking for a more comfortable headphone that my first pair(280pros). Im using a cheap amp(Behringer HA400 4-Channel Stereo Headphone Amp) and am looking to upgrade the sound a bit. Im currently looking at buying a Bravo V2. My budget is only 100 for the amp. My setup is daisy chained out of a Focusrite 2i2 to a HA400 right now. Im going to daisy chain the amp to all of that. Will it be enough power to run my DT880's? Should I consider getting the 600ohm instead? What tube would be best to enhance bass?