This was wedged in my LP collection for about 20 years.  Glad I held onto it, I hope you enjoy reading through it!

This is great, I like the retro design and size of the TNT series.

Very nice catalog Paul,....i use to own the HV1A phones on there... used it mostly for.... DJ-ing....i remember when i sent them back to Koss for repair instead they sent me a replacement with a different model the r/80s...because the HV-1As were discontinued but they now carry the replacement cushions for them.....r/80s nice phones use those mostly for a bit of noise isolation or tv watching...

drooling over the Porta-pro JRs....looking for those...to add to my collection....thanks for saving it and sharing...

I purchased a box of the TD/20s from an electronics chain going out of business--a buck apiece.  The entire case (10-12 pairs) lasted about year.  These were pretty chintzy but you get what you pay for I guess.

What's the difference between the Porta Pro JR and the regular?  Is it missing the "Comfort Zone" switch?

yeah the pro JRs...is missing the comfort switch....they also made one exclusively for circuit city....called the Porta Pro 2....a bit similar to the JRs with the missing comfort switch but with a distinct logo...those came out i believe late 90s or early 2000