The Sony MDR-NC40's
are light weight, on-ear, active noise cancelling headphones designed for travel. They can reduce ambient noise by up to 90%.
They feature a foldable design, use a single AAA battery, and offer 30mm drivers with a 14–22,000 Hz frequency response. These budget-friendly, wired headphones (3.5mm jack) are noted for good comfort.
Key Features & Specifications
- Noise Cancellation: Active noise-canceling technology reduces ambient noise.
- Design: On-ear, foldable, and lightweight (approx. 80g without battery/cord).
- Audio Performance: 30mm diameter dome-type drivers, 14 - 22,000 Hz frequency response, and 100 dB/mW sensitivity (power off).
- Power: Noise cancelling operates on 1 x AAA battery. (without noise cancelling is battery free)
- Passive Operation: Can function as regular headphones without noise cancellation turned on.
- Cable: 1.5m cord with control unit mid-cord.
- Accessories: Includes a carrying case.
- Sound: Known for decent, warm sound with reasonable low-end, though sometimes described as bright.
- Portability: Compact, foldable design makes them ideal for daily commuting or travel.
These are used, but still work very well. Wear and tear to the earpad edges; I've seen them new for a fiver online and are super simple to replace.