After reading some other threads about cabinet bracing here on TB, I thought I might add my experience to the pot. My rig: Trace Elliot V300H (or V6), 2 x SWR 12 Packs (most often I just use one), and of course: Fender Custom Classic Jazz Bass. The 12-Packs are well-made (11-ply birch), somewhat braced, well damped, and very efficient. While I love the tone of these boxes, I noticed that when the volume gets loud, things got -- I don't know -- looser. The tone literally changed -- and not for the better. I always attributed that to the amps or the drivers. Then, after reading these threads about bracing, I thought I'd take a look at these bins and see what was up. Sure enough, there is no front-to-back, top-to-bottom, or side-to-side bracing. Well, there is the shelf port which is a brace of sorts. And there is a perpendicular bar brace on the baffle. Looked like a tweak opportunity! Now, I'm old and not in the mood to add weight to bins that already weigh 66 lbs. each. So I thought, "carbon fiber?" Yeah, but it's pricey. Who makes pre-fab carbon fiber tubing that is durable, easily procured, and cheap? Lightbulb moment: arrows. Longitudinally very strong, extremely resistant to compression, mass-produced, self-damping. Perfect. Went to Kittery Trading Post bought some Beman large diameter carbon arrow shafts. Got some epoxy and went to town. I doubled them up (two per brace, epoxied together -- side by side). Results: Okay. Look folks. There's been a LOT of disagreement about the value of bracing and designing cabs to work "best" without bracing, etc. Here's the deal: it makes a difference. Whether you care or not is up to you -- but it makes a difference -- and it's frikken' audible. It's not debatable. It was almost as big as swapping amps from Ampeg to Genz. Not quite, but big. This is what I heard: Dry. It's like someone removed a gallon of water (!). At low volumes, I now have to add bass to warm it up. It's so cool and controlled. Live and on-stage, it's HUGE -- as though the bin was bigger. I can add bass and it will just fatten up without flabbing. I would never have called these bins flabby, but after bracing, it was clear that that was the case to an audible degree. Another way of looking at it is that speaker bins have a signal-to-noise ratio. The signal is the drivers, the noise is the vibration of the bin. As it got louder, the vibrations of the enclosure affected the tone in a more unmusical manner. Bracing nullifies that effect and improves the signal-to-noise ratio! Guys 'n' Gals: just do it. Don't think about it. Don't worry about whether bracing will make things worse. It won't. It's not hard. Measure accurately. Use lots of epoxy but be tidy. It's cheap, easy, effective. Took me just a few hours. And the carbon fiber arrow shafts added maybe 3 oz. to the bin! In fact, I would be hard-pressed to think of any mod you could make to your equipment that had a more effective price-to-performance ratio. Obviously, some bins are made with great bracing. If yours is one of them, you can ignore my rant. Special snaps to the folks that recommended this line of thinking!!!! Peace.