Summary: I used these phones from 1977 till 1987 and beyond. I assume the original owner still has them. They were used to record and mix tracks in our small studio along with some other types. These were the favorites. They isolated you from room noise and they didn't lie.
Pros: Rugged, good sound, neutral, good isolation
Cons: Heavy, sonically flat, can be uncomfortable...
Summary: I have owned multiple KOSS Pro 4/AA headphones over the years. The Original high power, high volume, super durable headphones from the 1970s - there is a reason they still make them. The Good: They provide good, solid, clear communications audio.
Summary: I'm a DJ on a Morning Show. The ONLY issue I have is they weigh a ton, and with them on my head for long periods of time, they can cause discomfort. Duh, take them off. It's just a habit you have to get into....but the sound quality is worth the discomfort.
Summary: I inherited this pair of Pro4AAs from my Great Grandfather who bought them back in the '70s, and they've been working well ever since. They are certainly some of the best sounding headphones that I have ever used, with full response even down to 20 Hz.
Summary: I'm just about at the 1 year mark of owning these. They're about average as far as comfort, can't go more than a couple hours with them on at a time. They required lots of torqueing of the metal bands to make them crush my head less. The sound quality is the best of anything I've used.
Summary: I use these headphones regularly on my HF transceiver. Good-Sound quality; they sound great and dampen the ambient background noise. Bad-Comfort; they are heavy and the piece that goes over my head will not extend far enough.
Summary: I used the PRO4AA phones a lot in the 70's for stereo listening....the best that there was until Sennheiser came along (my opinion of course, and the Senn's were aimed at the "open air" crowd, not the "isolate the listener" crowd).
Excerpt: I used the last month. No. I love his look, he is class, the logo of the 2 sides, and the side contained nothing to redire.Quand I received was mixed. Unpacking the box and I found a headphone with a cover class, the connector mini jack / jack and screwed it all in a beautiful box.
Excerpt: Je l utilise depuis un mois. Non. J aime son look, il est classe, le logo des 2 cotés, et pour le coté renfermé rien à redire.Quand je l' ai reçu j'étais mitigé. Je debale la boite et trouve un casque classe avec une housse, le raccord format mini jack/jack vissé et tout ça dans une belle boite.
Summary: Bisher war ich begeisterter Koss Porta Pro - Nutzer. Allerdings sind mir meine letzten beiden kaputt gegangen, Kabelbruch. Beim zweiten passierte das schon nach einem Jahr. Der Pro4AA macht tatsächlich einen etwas vorsintflutlichen Eindruck, hat aber meiner Meinung nach einen noch besseren Klang als...