Sony ECR 400 Uni Electret Condenser Headphone With AdapterSony ECR 400 Uni Electret Condenser Headphone With Adapter

VERY RARE Sony ECR 400 Uni Electret Condenser Headphone With Adapter. These headphones are in excellent condition for their age. They work and sound great. There may be a slight channel imbalance but it is small enough to where I cant tell or its not there. It is very rare to find an old electret without imbalance So I think this unit is very pristine. Even so, can be fixed with windows audio balance or balance knob on an integrated amp.