Brass screws make a real difference on Dunlavy s ?


As some of you know, I have just about every model speaker John Dunlavy ever designed. I've tried a few tweaks, but never replacing the standard driver attachment screws with brass ones. I've read some posts that it really does make a difference, but before I make a run to the hardware store, I would appreciate any thoughts on the matter. Thanks in advance!
brauser

Showing 3 responses by pbnaudio

It'll make absolutely ZERO difference what the screws that attach the drivers are made from.

What will make a difference is how tight the screws are, so if you want to try a very simple tweak tighten up all the screws that holds the drivers in place. Don't know if Dunlavy used inserts/machine screws so make sure you don't over tighten.

So if some one claim that they can hear a difference after replacing the attachment screws with brass ones it's not because they are made from brass, its because they now are tight.

Good Listening

Peter
If as mentioned above the DAL speakers do not use inserts and machine screws they will come loose to a degree over time, the wood expands / contract with temperature and humidity, this coupled with the vibrations form the driver it self cause this. Its not a matter of poor quality control etc.

The DAL speakers used mainly VIFA drivers, some ScanSpeak, all which can be secured with 8/32 machine screws into inserts. If your up to it Theese work great. You will need a 7/32 drill bit to pre-drill and a 4MM allen key to install them. Then get some 8/32 screws at .625 long, brass if you insist :-) 8/32 by 5/8 Brass Screws although it will not make any difference, and you will not have to worry about this again. Please remember to use a sealing gasket between the driver and the cabinet This works great.

Best of Luck

Peter