Please find attched the original instruction insert card for the QED HC-2 Headphone Connection unit. The headphones remain ON all the time. Bob Abraham the founder of QED always hated the design of many mainstream amp which relied on the headphone ...
This product was introduced in the early days of CD players when most people would have had an amp with either a spare AUX input or Tuner input but no dedicated CD input. Because the AUX or Tuner input would usually have an input sensitivity of a few ...