Nope.... won't work goyo 007. Your 3 PRO is only 4 ohms stable. Combining a 4 ohm load (410HLF) and an 8 ohm load (410HE) will give you a 2.67 ohm impedance.
Some might disagree with me on this one but I've never been a fan of combining different impedances either. Especially with all tube amps.
Nope.... won't work goyo 007. Your 3 PRO is only 4 ohms stable. Combining a 4 ohm load (410HLF) and an 8 ohm load (410HE) will give you a 2.67 ohm impedance.
Some might disagree with me on this one but I've never been a fan of combining different impedances either. Especially with all tube amps.