Brass screws make a real difference on Dunlavy s ?

I'd have to go with Peter on this one. My Duntech Princess speakers benefited from tightening the screws holding the drivers periodically, especially the woofers, but you do have to be careful not to over tighten (the Duntechs had inserts for the screws that could come loose if you went too far with the tightening).

Rcprince is absolutely right on his post above. Also, if you don't have inserts and your screws are just going straight into MDF or Plywood, you run the danger of stripping the threading in the cabinet. Be careful.

One other issue I've read about concerning tightening the screws is that it can be possible to tighten them too much to the point where the frame/basket gets out of true. In those instances, the driver and surround are not operating in a true single plan and the pistonic motion of the driver can be affected.

Not sure if this is true or not, but if you think about it, it certainly seems entirely feasible.

Back to brass screws. I have no idea if it makes a difference or not, but years ago, it was suggested as a tweak to the owner of Omega speakers. Louis (The owner) liked it so much that he now uses brass screws on all his models.

Dunlavy speakers have no threaded inserts. Dunlavy speakers do sound better with brass machine screws on all the drivers as well as the tweeter mounting face plate. Replacing the steel mounting hardware with brass on the crossover back plate ..improvement there can also be heard.

Brass is the metal of music. Brass will also interfere less with the flux field whether that field is stationary or moving. The use of brass fasteners are beneficial on most every type of application in audio electronics. Tom

Peter, I learned it from above source, Louis at Omega Sound who is as honest a person as there is in audio.
It worked very well on my Omega 3XRS .
Also improved a bit my Rega RS-3, Gallo CL-3 and Totem Model 1 Sigs.
After 45 yrs in audio I'm not much for tweaks , brass screws
are only one I found helpful in a long time.

Upon reflection I did not try them on my Totems, some other one my elderly brain can't recall.