Saw this elsewhere, Monolith by Monoprice AMT Headphone:
https://www.monoprice.com/product?p_id=43235
| — | — |
|---|---|
| Transducer Type | Air Motion Transformer (AMT) |
| Magnet Type | High‑grade N52 Neodymium |
| Frequency Response | 15Hz ~ 40kHz |
| Total Harmonic Distortion | <0.1% |
| Nominal Impedance | 32 ohms |
| Sensitivity | 90dB/mW |
| Headphones Cable Connectors | Mini 4‑pin XLR |
| Audio Plug Connector | 1/4" |
| Weight (without cable) | 24.0 oz. (630g) |
Lighter than the HEDDphone.