Originally Posted by

**DannoXYZ**
Resistor affects AC same way as DC as current only flow in one direction at any moment in time. Think about the resistive load of a 60w bulb vs. a 120w bulb. Anyway, hooking up a resistor in series will limit the total current flow. If it's an 8-ohm speaker, adding an 8-ohm resistor in series will reduce power by 1/2. Adding a resistor in parallel across the leads creates a voltage-divider. Sure you might get lower power going through the speaker, but may end up with 2x or 3x the powerr being shunted through the resistor.