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I think the 44 Magnum is 3A @ 24v so thats 72W whereas this is 5.5A @ 19v making 104.5W, it would be slightly bigger but not huge. It would be the same as a Largeish Laptop Charger.
Oh! I WISH I had taken pictures at the time! Years ago I built a 100V line amp for our rifle range.
The actual amps were ICs (like 2030s) the design culled from a mag and called "The Matchbox Amplifier" and indeed it would have fitted in a box of Swan! The silly part was the OP traff which was a 250W unit from a scrap amp that had 8 2N 3055 (type but higher rated) OP transistors. The amp was powered from a 12 car battery and the other absurdity was the decoupling cap. 22,000 mfd at 35V bigger than a bake bean tin!
The speakers were explosion proof horns salvaged from a defunct tannery and it all worked very well!
Dave.
For a backup it is probably too expensive ...
I found the Magnum was very shouty - so it could get quite loud, but it really had very little low end.
only had it on loan for one gig though, I may have missed somthing.
http://www.seymourduncan.com/power-amp/powerstage-170
http://www.seymourduncan.com/power-amp/powerstage-700
The interesting thing is that the *worse* the power supply - in technical terms - the *better* the power output holds up at higher impedances.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein