For two months my kph30i was in Koss for warranty repair, I bought a pair of these UR42iks as a temporary replacement/free kit. Unfortunately, both attempts failed me - the kph30i they sent me was also damaged, assembled haphazardly; and those UR42iks don't work nearly as well on me. They are not at all comfortable for prolonged use, heavy and very tight that I could wear the kph30i all day and forget I'm wearing them. However, the UR42ik needs to be very durable and hard wearing and, being a more closed design, have more bass. Overall I prefer the sound and comfort of the kph30i. I wish I could skip them and spend the shipping/warranty cost on just one more kph30i and just admit that I'm extra careful with them. Process.
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