Will a 4 ohm subwoofer run at 2 ohms safely?
The subs are 4 ohms; there’s no changing that. If you have a mono amplifier that’s stable at 2 ohms, you can wire the two subs in parallel for a 2-ohm total load. That is exactly what mono amps are designed for. However, if your amp is a 2-channel, then your best option is just to wire a 4-ohm sub to each channel. Most 2-channel amps can’t safely run a 2-ohm load in bridged mode. Just remember that the impedance rating of a sub isn’t something that can be changed to suit the amp.
