“Essentially none,” I was told.
“Well, the PM-1 has better parts. But they essentially sound the same.”
It wasn’t just my imagination, I guess.
The PM-1 features luxurious lambskin ear pads and headband, and comes with a set of velour ear pads that can be easily swapped in, allowing for fine-tuning of the sound.
The PM-1’s 6.35 mm terminated cable features Ohno Continuous Casting construction, and everything comes packed in a handsome wooden box.
PM-2 purchasers have to make do with synthetic leather for their ear pads and headband, Oxygen Free Copper constructed cables, and a fabric carrying case.
On the other hand, the PM-2 is, according to the specs, 10 grams lighter, so those who purchase the less expensive version would have the advantage in a road race, for sure.