I figured this would be a nice forum to put, as I have never heard these, but oh so I would want to. Sony MDR-XB500 : I always wanted to feel bass below 20 hz. They appear lightweight and comfortable. I would imagine the sound is fairly transient and recessed in the presence band due to the...

Can I tell old from new on an external or internal visual inspection? What should I look for? The Koss website says "They were introduced in 1970 . . . Retired in the late ’80s, Koss swiftly returned the Pro4AA headphones to its product lineup due to overwhelming popular demand. They have...