What makes a Strad a Strad?

Antonio Stradivari was just a great luthier:
273 votes 57%

Aging process -- played for 100s of years:
87 votes 18%

Density of the wood used:
58 votes 12%

All the bad Strads were made into firewood, leaving only the good ones:
46 votes 10%

Varnish used:
19 votes 4%

(Poll closed: 483 votes)