The Bose Acoustimass 6 speaker system is compatible with both 4 ohm and 8 ohm impedance receivers. The Acoustimass module is a hub for all the speaker input from your surround sound receiver, which it then pipes out to the individual speakers. There are no internal adjustments that can be made in the Acoustimass module to change the impedance. If the audio sounds distorted, or if your receiver is getting hot or switching off, then you need to change the impedance setting on the receiver to fix the issue. Tips Writer Bio
