Back in our university days there was a Philips DeForest building on the way between home and school. One of my friends would dumpster-dive for rejected woofers and re-cone them.

The things we do to pay our way through school.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8