I am looking at a digital audio amp on ebay and its a good price but ending soon are they any good? ive heard they are made by audio bahn is this tru? it is a 4 channelit is a 420 watt max and 75x4 at 4 ohms please give a quik yes or no or some advice thanx. //content.invisioncic.com/y282845/emoticons/help.gif.cee8f684da1ba626487a8bc51152e1ec.gif