Quote Originally Posted by anamorphic96
Robert Harley from The Absolute Sound talked about ways to improve the performance of iPods. One of the items talked about was this device. The performance was not that good from what he reports and not worth the cost.

The biggest performance enhancer in his opinion was ripping in Apple Lossless.
I've also tried the Headroom Bithead amp, which is probably of significantly higher quality than the above product. However, I found the improvement (if there was any) minimal at best, and returned it.

Just using the headphones alone is fine, even with 300 ohm cans. Really, the limitations are in the iPod itself, and no amount of juicing it up is going to get around that.