Amazon.com has Etymotic Research ER4SR Studio Reference Precision Matched In-Ear Earphones (Detachable Balanced Armature Drivers, Noise Isolating, High Fidelity, World Leader Response Accuracy) on sale for $289.95.
- High performance balanced Armature drivers are precision matched to within 1 dB
- Sleek, anodized, laser-etched aluminum body
- Braided, reinforced 5ft detachable MMCX cables
- 35-42 dB of noise isolation with a max output of 122 dB
- Precision machined metal bodies with anodized finish