I own this and have used it with Shure 535. For the money it is very good. With the new firmware it does not do vol. control on mine so the volume is controlled by your player. Be careful to make sure that the volume is properly set lest you damage your eardrums. I may end up selling mine because it does not have a battery and I mostly use headphones while traveling. My i-devices are unable to provide enough power for LH 450.