Warning: I bought some Pioneer headphones during the last wootoff, they had some issues on the left ear, and Pioneer is not honoring the warranty on them because “Woot is not an authorized reseller”.
I bought these many years ago. They work ok but need a sub woofer to bring the base out. The grill needs to be set just right to make it stay in place. All in all not a bad price for what you get.
Frequency response is good at this price I think. Not super low, but better than a lot of other speakers in this price range. For example, these are spec’d to go 2hz lower than my 10" subwoofer actually. However, that does not at all mean the bass actually sounds good, it just means that it’s there. I have no experience with these.
It means there are two drivers. Mid-range/bass driver and a tweeter (high freq.)