The role of the same speaker and headphones, general with moving iron type is diaphragm vibration type which is, according to the principle of headphones, it can be good or bad of the diaphragm and vibration and the distance between the iron core is a very big concern, when diaphragm is too far away from the iron core, vibration amplitude is small; When diaphragm from iron core too close or even to stick, diaphragm vibration face when iron core, lower voice, and appear "considerable" sound, so when adjustment should pay attention to and the skeleton of the diaphragm between height, general pad a certain thickness paper circle.

When diaphragm uneven or appear Ming is now becoming wrinkly, should be replaced.

Test headset quality stand or fall of simple method: is the two terminals headset line friction between, listen to the voice of the headset to make a judgement in size. Nature is the noise is beautiful, so high sensitivity, sound pickup ability.