You are right Chris, feel is the best way, but I have a torque wrench I use on my mountain bike. Never thought I would use it on a speaker!

What about Loctite, no one came back with an answer.

I tightened my drivers (by feel) and what a difference! smile

Thanks smile

DSP6000, 5500 centre, SW5500. Kef surrounds. G61R, HD621, MS600, MC200, G55, Lumgen,Oppo bluray player, Bluesound Node Icon