The power handling of a speaker enclosure is equal to the power handling of the lowest wattage speaker x the number of speakers in the enclosure.

All speakers should have the same impedence (i.e. 8Ω or 16Ω).

Example:

You have a 2x12 cabinet with a 15 watt speaker and a 100 watt speaker.

Your power handling is 30 CLEAN watts.

However:

Important: Distortion makes the speakers max out earlier.

here's some general rules of thumb:

• If you want clean go with a bit more than the rated power.

• If you want breakup/OD use 50% to 100% more power handling. (40-50 watt amp = 60-100 watt power handling)

• You play with lots of gain you want 4-5x the rated power.

The classic rock and metal setups:

Clean:

Breakup/OD:

Heavy distortion or fuzz:

50w head = full stack of G12-H's (240 watts) or a half stack of vintage 30's (240 watts)

100 watt head= full stack of vintage 30's G12-65s, or G12t-75's or a half stack of g12H-100's