Came across a video on the Tiyano tube chambers. The question as to what they are seems to come up regularly. The responses generally seem to range from, "Pure marketing hype with no effect" to " Subtle but has some rounding of the tone".
The video is in Italian but can be pretty easily followed along and there is a demonstration of the "with and without" effect towards the end using a Titano Emperor. ( a model which already usually sports two cassotto reeds - for those who wondered whther or not the tube shambers were ever used in conjuction with cassotto.)
I am not endorsing the system myself, but offer it up for general speculation and information.
The video is in Italian but can be pretty easily followed along and there is a demonstration of the "with and without" effect towards the end using a Titano Emperor. ( a model which already usually sports two cassotto reeds - for those who wondered whther or not the tube shambers were ever used in conjuction with cassotto.)
I am not endorsing the system myself, but offer it up for general speculation and information.