beyerdynamic DT 48 E (25 ohm)

Do i need an AMP and a DAC to run the Beyerdynamic DT 990 PRO - 250 Ohm??

Will the FX Audio DAC-X6 drive the Beyerdynamic DT 990 Pro 250 ohm headphones well to a good volume? Does the Drop for this include the power adapter. The description says power cord but doesn't mention the adapter so I wasn't sure. How does this item vary from the FX Audio DAC-X6 being sold on Amazon? Is this item produced by Shenzhen Audio? It seems like there are some counterfeits being sold. Thanks to all in advance for your help.

Amp and dac recommendation for Beyerdynamic DT 770 Pro 250 Ohm?

Beyerdynamic dt 770 pro 250 ohm amp

What is the best AMP for Beyerdynamic DT990 600 Ohm + Geshelli Labs Enog 2 Pro DAC?

Would this AMP have enough power to drive DT1990 pro and DT1770 pro headphones through the single ended audio jack? is 200 mW @300 Ohms enough? Both headphones are 250 Ohms. Could someone please clarify that for me?

Beyerdynamic DT 770 Pro 80 Ohm vs. M40x with ZMF Earpads

i am fairly new to the audiophile community. i am thinking of getting the Beyerdynamic DT770 Pros (250ohm). which version of the O2's should i get and, if possible, explain the differences. thanks in advance!