This indicates the electrical resistance of each headphone. With 200ohm, the sound will not be very strong if it is plugged into a phone or a computer directly, because it is made to be plugged into old amplifiers that send a current fart. On the contrary, the 32ohm has much less resistance so you can listen in a normal way on recent devices. (on old amps too, you'll just have to be careful not to turn it too loud to avoid damaging your ears)

Hi, it is important to see on the machine you are using. Not every machine provides the impedance. The higher the impedance, the more power is required with a better listening quality in the high and low frequencies. Be careful with closed-back headphones that the bass comes out more. I recommend these headphones for DJs or for techno, house, etc. creation. I hope to have answered you fully. Have a good time