I just had an experience with an expensive ($775) tweak that I wouldn't even have considered except for facing a milestone birthday and (with my wife's blessing) wanting to do something to take my mind off it. Sealing the deal was the 30-day, no-questions-asked moneyback.
I've had Gallo Reference 3 speakers for almost 4 years and love them. For a while now, the Mapleshade catalog has been featuring stands made specifically for these speakers that replace the original speaker bases with new ones constructed of 4" maple platforms with well-named brass "Megafeet" under them and brass decouplers that put about 1/16" of space between the bottom of the speakers and the top of the bases. Sounds counterintuitive, right? The speakers are held onto the bases with 6" brass screw/bolts.
After putting all this together and discovering a little too late in the process that it was really a two-man job, I started listening. Okay it's nice, even very nice, but $775-nice?
Fortunately I have a friend who has the same speakers. He offered to bring one of them over and compare against one of mine with the new bases, which he did. My Aesthetix Calypso linestage enabled us to listen to them balanced, right only, left only, and any combination, via the remote control.
When the two speakers were balanced (same volume from each speaker) you could hardly tell the stock speaker was playing! We were both amazed. The Mapleshade bases provided far more full-bodied richness, dynamics, better bass, and all the other good stuff. There were no downsides, and there still aren't, unless you count the $775.
My friend ordered a pair of the bases the next day. They're due to arrive this week. The least I can do is help him install them. No kidding. Dave