massive brass plate for isolation

My sense is that a brass plate would simply transmit vibrations, and perhaps ring into the bargain, as others have suggested. You need Isolation to improve the performance, a slab of any resonant material, absent anything else, will not give you that.

Savant Audio advised me to try using a 2-3" thick Delrin sheet screwed directly up against the base of component and then to use the Walker cones and disks below that.

If your looking to isolate a TT especially with spiked feet, I've been experimenting with 1" thick plate of aluminuim braced on the bottom with cross bars of 3/4" square aluminuim. I've had some great results so far as a top to DIY sandboxes. A couple of manufactors will cut plate aluminuim to size for you. A 20x24" plate 1" thick cost me about $200 delivered to my door.

Sorry to not answer the thread question. I really do not know about the brass.

Keep in mind cymbals are made of brass. They ring. Size determines
at what frequency they resonate at, ask any drummer. Just a thought.
Joe

Dissimilar materials used together are going to work the best. Sistrum was making a rack our of massive brass shelves and legs, that was supposed to sound great, but I don't know if they ever got off the ground with it...

Mixing materials with different resonant frequencies will offer the best solution when it comes to building a rack, or shelf. Try some alternating layers of different materials and see how that affects the sound...

O

o

.

I haven't tried a massive brass plate, but I'm not sure it would be awesome. I would think it may have more of a tendency to ring or resonant sound on it's own. I could be wrong, as I know some have turntable's with 75 pound brass platters and no complaints. However, I'm happy with 2-3 inch think slabs of maple wood with brass cone footers.

Cheers,
John