Well, the UM3X doesn't need an amp. However, if the source device is sufficiently low in power, bass can become seriously muddy and dis-coherent. A little extra wattage snugs the low end right up. This is assuming you're a little short on wattage, but I'd think the IPhone 4 would be ok in that regard. I know it's not the best, but it's not exactly crap either in terms of phones with 3.5mm audio out. What was the reasoning to start looking for an amp?
4/11/11 at 9:29am