Know of a "Dirt Cheap" tweak?

lexphin,

You were lucky to find them. Are they copper? Franck Tchang's placement is mandatory here. Google Franck Tchang acoustic resonators placement. This will take you to the page on his site with the diagrams. He is the master. Everyone else followed him.

Any extras you can put on other components and tweaks. I have them on DAC, transport and other devices.

Hi Sabai
    Yes, they're copper. I followed Franck's placement as close as I could, my room is a bit asymmetrical. Have not listened with this position, will report back with "perceived" changes. 

lexphin,

Copper is good. There are also silver cones but they are not easy to find. Franck Tchang's placement is perfect in my system. I would be interested in knowing your impressions. SR uses crystals under the screen. Audio-Magic copied this in their bells, but with no screen.

You can home in on the very best locations for almost any type of acoustic resonators like the tiny bowls or even tube traps using a SPL meter and a test time of say 315 Hz off one of those test CDS. This will allow very accurate placement of the resonantors where there are peak sound pressure levels that are say, 6 dB above the average sound pressure in the room. For example, in the upper room corners and first reflection points. You would be shocked at just how many of these exceedingly high SPL peaks there can be in a room. Oh, and don’t forget other rooms of the house.