- Category: Loudspeakers
- Published: Sunday, 06 December 2009 23:32
- Written by Justblair
Recently I gained possession of a vintage pair of Koss Pro4AA Headphones, age unknown, but circa 1970’s. My initial inspection of the headphones proved favourable, but with any electrical equipment which is 40 years old, some work was required to restore these to what hopefully approaches their former glory.
The Koss Pro4AA is a headphone that has a good reputation. A closed headset design (i.e. it isolates the user from outside noise) it was first produced in 1970 and remained in production until the late 1980’s. By popular demand Koss resurrected the design in 1988 and a modern equivalent of the 1970 design remains in production today. The modern version shares the looks of the original but internally is a different design.
This project was a quickie really, taking only around 8-10 hours of my time (across 3 evenings) to complete. To be honest when I took the project on, I kind of hoped that it would be more involved. I suppose it is a tribute to Koss’s robust design and industrial strength build quality that there was not really that much work required to get these headphones back up to scratch.