I'm talking about the 80's. The problem with other 4 ohm speakers is that they dip below 4 ohms across the frequency spectrum. The 80's do not dip below 4 ohms. That is why they are easy to drive.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85