frenchie wrote:it would be great if you could post a tutorial with pics on how to reak in a speaker with a variac safely as it's never been done before .....just a thought

I never got my teaching credentials here in the US, frenchie.
Fairly simple, but care must be taken to keep the voltages right.
Variac break in times:
Speaker Imp Speaker Power Rating Break in Voltage How Long?
8___________ 65____________13.165____________2 to 3 hours for a light break in
8___________ 30 ____________ 8.9 ______________20 hours for a full break in.
16___________65 ___________ 18.61
16__________ 30 ___________ 12.64
8 __________ 100 ___________ 16.325
16 __________100 ___________ 23.094
Your variac may vary (pun intended) from mine, by the way. But basically you take the power cord that is normally hooked up into the variac, and cut off the other end (not the one that plugs into the variac).There will be three wires. You only use the white and black ones, tape the other one off. Strip the white and black wires, and attach alligator clips or push on spade terminals, whichever you prefer.
If you want to break in multiple speakers you should do it in parallel wiring, so get ready to make some 2 wire jumper cables from your first speaker to 2nd, 2nd to 3rd and so on. If you wire them in series it takes TWICE AS LONG, so do it in parallel.
Put the speakers cone up, magnet down, wire them up, set the variac to the proper voltage, turn them on, leave the house (the hum will annoy the hell out of you), come back later.
Or if you have an isolation cab, such as a Grendel Dead Room (just got mine, love it), you can hook up the speaker inside that, then make an adapter cable to the 1/4" jack on the cab, and run it overnight while you sleep. I just did that from 4 pm yesterday until 1 pm today. The noise was almost non-existent and I slept 10 feet from the cab.
If you have to do multiple speakers, though, you'll need a lot of time, multiple cabs, or wire them up as before and leave the house!