When do you use a 4 channel amp at 2 ohm?

[airtas 10+ year member]

I have a set of Boston Pro 60s in the fronts which are 3 ohm

In the back I have Polk 4 ohm speakers

I want to run a 4 channel amp to all 4 speakers

The amp says it will give 75x4 at 4 ohms or 100x4 at 2 ohms

Can speakers be run at 2 ohms or is this just for subs?

Since the Bostons are 3 ohms what impact does this have?

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[chillin 10+ year member]

The only way for your amp to run at 2 ohms is to have speakers rated at 2 or run 2 sets of speakers up front. If you put 2 4ohm speakers in each door and ran them in parallel, the amp would see a 2 ohm load. Being that the Bostons are 3, the amp will put out slightly more power to them, somewhere between the 4 an 2 ohm rating.

 

[airtas 10+ year member]

thank you!