[AR-LST grub screw size]

They are american/english inch size hexagonal srews, just buy yourself a set to fix it

[Pre/power amp for LST]

I have  bought 2 x DENON POA 6600A to power the LST and they are great for the purpose, and affordable

 

Regards

 

Jurgen Prinsen

[AR-6 Restoration]

I think I can help you to a set  of 8" AR woofers, but you can also look on ebay.de .

Has anybody the right type-no's of these woofers

They need new surrounds, but this can easily be done, it is very easy to align them properly when you put a 20-100Hz signal (from youtube) on the drivers, I did glueing with bison-tix, but any tixotropic glue will work, regards  Jurgen Prinsen weldtech@online.nl