I was scrolling through Facebook and I saw an ad for Helm Audio and their imminent Studio Planar headphones, launching in 11 days. Always like being up to date one what's current with planars, so I clicked. I was pleasantly surprised.
Now, I wasn't able to find info on their site about whether these headphones are open or closed back, but they're marketed as portable, and accept a single 3.5mm cable. This means you can use them with your favorite Android or iOS cable! I'll be using my q-Jays Android cable, because 3-button remote for Android! 🙂
Besides that, Helm claims to be using the world's first rectangular driver, as opposed to a square or circular driver, with supposedly less distortion.
With 66mm drivers, these planars have a frequency response range of 10 - 50,000 Hz, with a SPL in excess of 100dB despite the unit's 42 Ohm impedance. Good specs for a $350 pair of headphones.
This product already seems to be an excellent value, but I'm sure we can get an even better deal by bringing it to Massdrop.
Here's a link to the product page on Helm's official website (I don't know why the url has the incorrect product name):
Here is the Massdrop poll: