Went to the shop that built my box to grab a trim piece and they had this matte black armored rig parked out front, covered in 'FAFO' lettering and a plate that says 'SWATTED'. I figured it was some prop til the owner flipped a switch and a dozen eighteen inch subs inside started walking. Stood about ten feet back and could feel it in my chest like a heartbeat. The shop windows buzzed, the mirrors on the truck shook, and a car alarm across the lot went off. He only ran it for maybe fifteen seconds and my ears were ringing after. Asked what it takes to feed all that and he popped the back open, huge bank of batteries stacked behind the cab plus a monster alternator setup. Said it's mostly a show piece for events but people keep asking for demo rides. My little two sub build suddenly feels modest.
Heard the SWAT truck fire up while picking up my enclosure today
Nov 11, 2026
Last reply: 9 hours ago
3 Replies
I chased that exact feeling for a couple years with my old Astro van build. Four 15s tuned low, and I thought I needed every watt I could buy. The real lesson was the electrical side. My lights dimmed so bad at first that I added a second battery in the back and eventually a beefy alternator, and that did more for how hard it hit than any amp swap did. Voltage sag will make a monster rig sound weak faster than anything.
What struck me reading your post is how short the demos are. Mine was the same way. People would sit in the van for one song at most and climb out grinning with their ears ringing. I ran mine mostly at shows too, and honestly after a season of that I sold it and built something with two subs I can actually live with daily. The big walls are fun but they turn every drive into an event.
The FAFO lettering crowd is real though. There was always some guy at the meet wanting to see how long he could stand next to the port, and there is always one truck that makes your whole setup feel like a factory system. If you ever get offered a demo ride in that thing, sit on the passenger side and crack a window. The pressure inside a sealed truck with a dozen drivers going is a different animal than hearing it from ten feet out.
I heard a build like that at a show in Columbus a couple summers back, a guy with six 15s in an old Suburban doing burp demos. Fun for about thirty seconds, then I was standing by the food trucks with my fingers in my ears like everyone else. What stuck with me was how little of it I acutally enjoyed. It was loud, sure, but I couldn't tell you a single song they played becuase it all blended into pressure.
My own truck went the opposite direction over the years. Started with two 12s, traded down to one Sundown X-12 in a sealed box, then finally a ported box tuned around 32 Hz. It's maybe a tenth of the output of that thing you saw, but I can drive four hours with it, hear the vocals, and still get punched in the chest on the right track. My wife actually rides along now, which never happened with the old setup.
The demo rides thing makes sense though. Everyone wants to feel it once, nobody wants to feel it every day. That's why show pieces exist and why the guy built it for events instead of his own commute. Enjoy your modest build, odds are you listen to it more than he listens to his.
Ha, that battery bank description takes me back. When I was running amps in the 90s the fix for everything was bolting in a big stiffening cap, and half the guys at the meets swore by them. A cap might help for a quick bass hit but it aint doing a thing when you're pulling serious current for more than a second or two. Real amperage comes from the alternator and reserve capacity, which sounds like what that truck has figured out. Curious what kind of alternator he's running though, a dozen 18s has to be pulling some serious amps even at idle.
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