Mrtennis...4 ohms is a lot for the MG1.6, although that value would be in line with what many speakers use when trying to hush up a dome tweeter to match the typical woofer. Since Magneplanar designs and builds both the woofer and tweeter parts of the MG 1.6 they can get the efficiency to match better than a manufacturer who uses off the shelf drivers.
I settled on 1.5 ohms. However, I have also replaced the stock iron core crossover inductors with #10 air core inductors having less resistance, so my woofer efficiency is a bit higher than stock.
I settled on 1.5 ohms. However, I have also replaced the stock iron core crossover inductors with #10 air core inductors having less resistance, so my woofer efficiency is a bit higher than stock.