Updated: Aug 24 2018
All MartinLogan speakers are compatible with receivers rated at 4, 6 or 8 ohms. We have tested several mainstream, high quality receivers and have found all are more than capable of driving 4 ohm speakers. The limitations of an amplifier rated at 6 or 8 ohms only becomes obvious at extremely high sound volumes over a very extended time period. For most every other application an amplifier rated at 6 or 8 ohms will perform perfectly with MartinLogan speakers.