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From a Maestronet.com post:
Starker bridges were first made for Cellos...some were made for violin, but didn't survive the fad stage. The bridge was invented by Janos Starker. The regular French cut bridge and the Starker are close in appearance, but the Starker has an "S" where the heart is normally. The bridge feet also have little conical holes drilled up from the bottom..."to focus sound" to the top of the instrument. In my experience, these bridges may make a cheap instrument sound better, but I have never used them on a quality instrument.
SO after reading all that — I’m thinking why not just drill the holes up from the bottom yourself (or have a luthier do that) if you’re trying to increase the sound volume?