I'm a Drummer!

[Trentie]

Hey guys, my name's Trent Pascoe. I'm 17 and in grade 12 this year.
I live in Toowoomba, QLD, Australia and I play drums.
I'm also the head of the Technical Team (sound, lighting, etc) at my school, so I'm pretty handy with a soldering iron.
For my Music Extension project this semester, I am building (yes, from scratch) dual 2x12" cabinet stack.
I managed to get an old Laney G150 amp off of a mate who got it off a mate who got it off a mate who didn't need it anymore for free. I've also purchased some 19mm CD plywood to build the cabs from, and sourced some wood from school for internal bracing, etc. Yes, the cabs are HEAVY as mothers, but they should last for quite a few gigs. Nice and tough. The main aim of the project is to do it on the cheap and make it tough and reliable to boot.
This site is awesome. I'm on it in every Music Extension lesson gathering ideas for the project.
One question though:
Is the Laney G150 head 150 Watts in total (75W either side) or 150W each side (total 300W)?
I look forward to spending a lot more time on this forum, all the people here seem really cool.
Many thanks,
Trentie.

P.S. I've attatched a picture of where I'm up to at the moment with the stack. The cab on the bottom (2x12") is one of the twin cabs that I'm constructing, while the 2x10" on top is the subwoofer box that my brother and I knocked out in a couple of hours for his car with the plywood offcuts.
Until he gets his licence (he's 15) and pays me back for the cab (I payed for it all), I might try and source another smaller head to make a mini-cab for practice with the 2x10".