And not just in a good way... It's working, and sounds cool, and even got through a 4-5 hour session without any problems (though it did get hot..). Since it's an old amp, and I got it used, I asked my Dad to have a look at it, to check if everything's alright. well, when we opened it, we saw someone's been funky with the electronics... There is a fan added. However, it's not secured to the chassis anymore, the glue gave in. And the way it was fed power... Also, it's not blowing from one side to the other, it just blows air at the power section... a bit illogical, but it seems that was the only place where they could fit a fan. There are some nasty resolders. I have never soldered anything in my life, but I bet even I could do better than that... The power amp section also has some extra wires hanging around, with those ugly solders... Some of the jacks on the back panel are not connected. For example, the fx send. And some more... So, does anyone happen to have the schematics for the AMP BH420 (World version: switchable 100-120/220-240V)? It would be much appreciated. Thanks!