Shure SRH840A Professional Studio HeadphonesDeveloped upon the same foundation of the SRH840, the new SRH840A Critical Listening and Monitoring Professional Headphones deliver premium detailed audio plus a new design and improved features.Premium detailed sound with the lowest harmonic distortion. Clear and accurate sound for critical listening and monitoring.Premium, padded headband provides ergonomic fit for superior comfort over extended periods.KEY FEATURES:- Updated, sleek design- Precisely tailored frequency response delivers rich bass, c