Will I be able to drive these with a home stereo amp? I have the Hifiman 4xx and must push the amp to about 1 o'clock for a desirable volume, which sound great btw. I also have a fiio a5 and the e17k alpen and the Earstudio es100. Just wondering if anyone has experience with smaller maps. The home stereo amp is strong Harmon kardon from the early 90s.