Shure HPAEC840 Replacement Ear Cushions for SRH840 Headphones

I use my Shure 440's on my MacBook Air laptop together with a Nuforce2 usb dac, and they sound really good. But with this simple upgrade you get more bass (it reacher lower down too), clearer high notes, more open soundstage, and the cushions are a lot more comfortable being padded with a different and softer type of foam.