Ventrasonic accoustic chamber

[micksstixuk]

Hi All

i wondered if youanyone could possibly help me with the following;

i have a Ludwig Supraphonic snare , serial number 580013 which prom the ludwig website tells me this is circa 1968. Inside the drum itself is a "Ventrasonic accoustic chamber" which is a plastic vent that channels all the air down onto the snares when the batter is hit.

has anyone come across this before and if they have , is this a rare item?

i'm goping to post some pics when i get chance, but any help in the meantime would be appreciated

Mike Smith

England - UK

[ddrumman2004]

Check this out...

http://www.patentgenius.com/patent/4037508.html

This is most likely an added "piece" installed into the drum as I'm "thinking" Ludwig never installed these in their snares. Someone will correct me if I'm wrong.