- 01
Impedance
Impedance is the electrical load the amplifier sees. It changes with frequency, so a speaker marked 8 ohms is not 8 ohms everywhere.
- 02
Sealed vs ported
A sealed box traps the rear wave in an airtight cabinet. A ported box uses a tuned vent to add bass output around tuning.
- 03
Frequency response
Frequency response shows how loud a speaker is at each frequency. It helps reveal balance, crossover behavior, box tuning, and room problems.