Koss QZ900 Noise-Cancelling Headphones
Crutchfield Customer Review (What's this?)
I purchased them for use in my tractor and excavator. Noise canceling is the primary reason for using headphones,. I am 67 still have reasonably good hearing, I retuned the headphones to Crutchfield. The noise canceling was minimal and they had a noticeable hiss. The Crutchfield support team went on line to a few product review sources and found ratings all over the place. It appears from the "diversity" of the reviews that Koss' quality control is poor. With that track record, I went to Bose for replacement, It is too bad because I liked the fit better than the Bose units I traded up to. Crutchfield's support team is awesome! I have never been treated better when I have had to return something and got really good advice from the team. The Bose noise canceling ability is fantastic.
Pros: Rugged design and construction. Good over-ear muffs. Good fit. Lifetime warranty.
Cons: They didn't work. Minimal noise canceling ability; noticeable hiss.