Impedance 100 Ohm (2x50 Ohm) Magnetic HEADPHONE IDEAL for CW Radio Tube Receiver | eBay
Headphone Impedance Demystified: Do I Need a Headphone Amp? | Headphonesty
beyerdynamic DT 770 PRO Studio Headphones - 80 Ohm : Amazon.co.uk: Musical Instruments & DJ
Beyerdynamic DT 100 headphones 16 ohms, black | Bax Music
beyerdynamic DT 100 Studio Headset - 400 Ohm - Black : Amazon.co.uk: Electronics & Photo
beyerdynamic DT100 400-Ohm (Silver/Black) favorable buying at our shop
Purchased the BEYERDYNAMIC DT 900 Pro X yesterday for 250€ ($249). They only have 48 ohm (low ohm). I've been told I shouldn't go over 100 ohm for smartphone, laptop, tablet usage.