The PK1s and M5s are more similar than I thought they would be however...
I find the M5s to be smoother sounding - a bit more musical. They also extend deeper and have more of a bass slam than the PK1s. The M5s also offer more instrument separation and placement. The two are very different listening experiences due to the inherent isolation of the M5s and vice versa with the PK1s. If the PK1s were IEMs, I think the two would be very close in how they sound so deciding between the two is somewhat based on what you're looking for. But based on pure SQ - nod goes to the M5.
I find the M5s to be smoother sounding - a bit more musical. They also extend deeper and have more of a bass slam than the PK1s. The M5s also offer more instrument separation and placement. The two are very different listening experiences due to the inherent isolation of the M5s and vice versa with the PK1s. If the PK1s were IEMs, I think the two would be very close in how they sound so deciding between the two is somewhat based on what you're looking for. But based on pure SQ - nod goes to the M5.










. I was about to pull the trigger on PK1 before I read your comments. Warrior05, could you elaborate a little more on the PK1 vs M5 comparison?
Uh... I do have to work you know! But I'll throw together some quick notes. Ah, the hardship.


Of course that is a total guess on my part.

These are superior to the PK1, but head-to-head with the K81DJ? Somehow the whole thing doesn't fit together to me and I can't correctly imagine the M5's performance.