The fast rings will hold water after a little while, tried it myself and I don't think they actually work as advertised. The Fast Ring made no
discernible difference in SQ with my installation and the only reason I got them in the first place was because they were free with a set of speakers I bought. Not trying to rain on your parade either but I would be surprised if those silver flutes sound better than those high res Sony's you had. The Sony tweeter might have been **** but I bet the woofer was half way decent. The Sony's are made for a car door with a higher total Q and a resonant frequency ~ 60-80. The Silver Flutes have an fs of about 37.5 and a total Q at a low .24. Without the air spring action offered by a smaller enclosure as they were designed to help the woofer out, the total Qtc of the system with the Flutes (total Q) will be low and bass response will suffer as a result. Attached is a graph I did in bassBox6 Pro showing an AudioFrog GS60 vs that Silver flute in a 1.5 cu ft enclosure simulating a car door so you can see what I mean. It has an fs of 80.5 and a QTS of .67 so the AudioFrog has a stiffer suspension more suited for the infinite baffle environment that is typical of a car door. The Silver Flute is in red and the GS60 in yellow.
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