Shure Professional Monitoring/DJ Heaphones, SRH Series 440A The SRH440A headphones provide strong sound quality with enhanced frequency response, for accurate audio playback at any volumeDesigned with comfort and convenience in mind, these lightweight headphones can be easily taken wherever you need. The SRH440 headphones provide strong sound quality with enhanced frequency response, for accurate audio playback at any volume. Designed with comfort and convenience in mind, these lightweight headphones can be easily taken wherever you need. The Shure SRH440 Professional Studio Headphones are optimized for home and studio recording. The SRH440 headphones reproduce accurate audio across an extended frequency range which makes them ideal for monitoring and accurate listening, offering professional sound quality and comfort. The SRH440 headphones are suited for use both at home or in the studio. Impedance, power handling and sensitivity are all calibrated for professional audio devices such