Originally Posted by charli3
Type Mini3 (or m3) at google, and let me know whats the first result.
They are the same one.
To be honest, i haven't seen threads or reviews with the M3 driving Akg Hp's.
Not sure what you are googling, but when I type in 'mini3' I get the appropriate link at amb's site. When I type 'm3', I get a bmw results but if you do 'm3 amp' the appropriate (and different from mini3) link to amb's site comes up.
I am not really sure how much it costs to build a m3, probably depends largely on what kind of casework is done, but it will almost certainly be cheaper than the burson since I often see them in the for sale section for ~500. Based on the published specs, the m3 has generally better specs, with fantastic thd, crosstalk, and a very flat freq. response. The burson has a bit more power, but this is probably only an issue if you are trying to drive something very difficult like akg1000 or he-6. The burson also uses a 24 stepped attenuator, which seems somewhat coarse to me.
All that being said, I have not heard either of these amps so hopefully someone who has heard both can chime in with some impressions. I know if I were to pick one it would be the m3, not in small part because I really enjoy diy projects.