For the past couple of years I've gone between using my cMoy amp or a generic "boostaroo" unit that I got from Radio Shack. The problem with the "boostaroo" is that I've had wire breaks, I am now on the 3rd unit. At $25 each, it's certainly not made well, considering I usually get about 6 months out of it before the sound cuts out because of a wire break. The 90 day warranety doesn't help me then, however it did happen within 90 day once, and I did get a free replacement. I like the "boostaroo" unit because it is small and uses only 2 "AA" batteries which seem to last forever. The boost is sufficient enough to drive my Sennheiser headphones. I am not thrilled with the cMoy I had built from a guy named "Zman". It was several years ago at least since I got it. I don't use it much because it gobbles 9 volt batteries, which are expensive, and the unit takes 2 of them. Also I have sound drop outs due to a lousy soldering job and I constantly have to open the case to fix it. I generally get about 10 hours of play from it before the batteries get weak and the sound fizzles. If the "boostaroo" was made with a removable cable (a jack, like the cMoy) then the wire breaks wouldn't be an issue. But I guess then they wouldn't make money then. I dont know why the cMoy battery life is so bad, I usually have the volume knob set low, only about 1/3 of the way or less. Does it sound like I have a defective cMoy? All I know is I'm not at all happy that I'm gonna have to spend either another $25 on a boostaroo or $40 on a cMoy. I know I can build it myself but I dont have many tools (soldering iron,etc). I'd just like an amp that would take AA batteries (9 volts are expensive, usually $5 each for an alkaline) and would last. A boostaroo unit with a jack instead of attached wire would be great. I wonder if anyone tried modding a boostaroo to have a jack instead. This time I'd just like an amp that will not give me any probs. I'd get another cMoy if it was built right, used one 9V instead of 2, and got more like 30 hours battery life.