So it looks like you are handy, Gino. You shouldn't have any problem replacing these caps, and once you get the hang of it, you'll look at all your broken electronics differently! Since replacing 2 caps on one MFW15 amp, I plan to fix up my Buttkicker BKA1000 transducer amp (see pics on another thread in this section) that had catastrophic caps failure (at least 2 caps).
My other MFW15 amp has more damage than I realized. In addition to the bulging capacitors, there is 1 ceramic disc capacitor that has burned out also. I plan to try to repair that.
I also have a HSU VTF mk3 sub that has an amp go bad--I pulled the plate amp, but can't find any blown caps--might end up just replacing that amp.
Anyhow, some additional newbie-soldering advice:
1) I would buy a decent temperature-adjustable soldering iron, from a reputable maker. I have a Weller WESD51 station, cost me $150. It should be the last one I need to buy. You could use a soldering pencil, but those do not have adjustable temperature, which might come in handy as you work with more delicate parts... You can probably get a decent solder station for ~$50 or so...
2) Which type of solder tip? Well, I got my advice after scouring the internet, and have found that a small, flat chisel-tip works well. Pencil tip style would take a long time to heat up the joint for de-soldering.
3) Don't use a solder-gun. It's too high power, and can damage the board. Plus, the tips on those are too big for this job.
4) There are different ways to desolder, but I used a desoldering wick. Worked well.
5) When I first tried to do this, I had soldered only a few times. I wasn't having success at desoldering the bad cap, and was wondering why. Turns out I had an old tip on the solder iron that was heavily oxidized. Put a new tip on, tinned it properly, and it now works like a charm.
6) I got the bulk of my advice from this youtube video (and subsequent ones): http://www.youtube.com/watch?v=J5Sb21qbpEQ
The guy is very entertaining!
7) As for how to turn on/off these subwoofer amps, I'm possibly looking into a Furman-type unit, as was recommended by someone in the Buttkicker thread...http://www.furmansound.com/product.php?div=01&id=PS-8R_II
Good luck, let me know how things go