01-06-2009 04:17 PM
01-06-2009 05:02 PM - edited 01-06-2009 05:04 PM
Middle school physics equations...
Wattage = Current x Resistance.
Hooking up an identical speaker (or one with the same resistance) decreases the load by half. So if the original resistance was 8 ohms, its now 4 ohms.
To generate the same wattage, you need double the current.
As far as too loud, again, its an issue of physics. I have no idea what the numerical variables are in your situation, but the mathematical relationship is obvious.