This is a question you should post on Head-Fi.
The K-1000 are very poor in bass reproduction, so don't expect miracles in that regard. They have a wonderful sound otherwise.
If you have the el-cheapo T-amp with the wall-wart "supply" then you cannot expect to have a big bass, given the supply limitations. Switch to a hefty regulated supply or battery.
It's very hard to tell which amp would fix your bass problems. My friend tried several headphone amps, from cheap to mid-price ($1200 or so) and none was great with his K-1000. He then tried a vintage Marantz 2230 receiver - and it did the magic...
I suggest you fix these fundamental issues before trying different cables as tone controls.
The K-1000 are very poor in bass reproduction, so don't expect miracles in that regard. They have a wonderful sound otherwise.
If you have the el-cheapo T-amp with the wall-wart "supply" then you cannot expect to have a big bass, given the supply limitations. Switch to a hefty regulated supply or battery.
It's very hard to tell which amp would fix your bass problems. My friend tried several headphone amps, from cheap to mid-price ($1200 or so) and none was great with his K-1000. He then tried a vintage Marantz 2230 receiver - and it did the magic...
I suggest you fix these fundamental issues before trying different cables as tone controls.