Ohms??? What’s the impedance? And do I need an amp… recently got the Beyerdynamic DT 770 Pro (which actually was false advertising cuz they were studio) Special edition 80 ohm closed back Headphones. And Idk, man… maybe (nvm not just “maybe”, I’m almost certain I now need to spend $200-$400 on an amp or dac or AMP/DAC combo, so I can listen to headphones at my desk? And only then? Yah garbage. I expected them to atleast have some impressive sound with a simply plug into a laptop, but nope. My koss sound better than those at the moment z(with AMPS OR DACS, etc). So my humble question… what’s the impedance or “OHMS” of these headphones ?????