Matched quad = 2 pairs w/ same bias point?

[MikeMcK]

This may be a dumb question, but I have an amp that uses 2 6L6es. If I buy a matched quad, use 2 of them & bias them amp, can I replace them later with the other pair without having to re-bias?

[Blue Strat]

Yep. A lot of people do this.