I would say it depends on your speakers impedance curve, when they are playing. Some speakers may be rated at a certain impedance, but dip during certain frequencies. The 331 is stable down to 2 ohms, so assuming your speakers don’t dip too much, I think it would be ok. Remember-two speakers connected in parallel will cut the lowest resistance in half, so if your speakers dip below 2 ohms, you will actually get 1/2 of that.
