I have had the Peltor 6S for over a year now and I must say they did seem like a good value at there price,But sadly they are not.
They seem to have a slight buzz,crackle or hiss.
They DID work great at the rang I will admit,the battery replacement is a bit of a PITA and if you leave the unit on over night accidently they will drain the batteries and might cause them to over heat the unit and cause the batteries to leak (it states this even in the manual),so they recommend you do not leave the batteries in the unit for a long time .
I have since switched over the the Howard Leight Impact Sport models and found them to be much better than the Peltor 6s. In price, options and battery life and battery replacement.
Pros: slim,light
Cons: battery replacement and battery life and no automatic shut off
This review was written in the old system and had content requirements that are different than reviews written today.