Two issues: Aluminum is more likely to oxidize (corrode or rust) when in contact with certain materials like certain other metals. The oxidation presents increasing resistance at the contact points which causes heating and can lead to fires. Studies have shown aluminum wiring in houses is statistically more likely to lead to fires than copper.
Secondly, aluminum tends to expand and contract more than other materials with changes in temperature, which can lead to loosening of connections over time. To prevent this, either use aluminum-to-aluminum connections or fasteners that resist this type of loosening.
Both of these issues are potential problems that become concerns as time passes. We should weigh them against any sonic benefits that may be audible immediately.
Secondly, aluminum tends to expand and contract more than other materials with changes in temperature, which can lead to loosening of connections over time. To prevent this, either use aluminum-to-aluminum connections or fasteners that resist this type of loosening.
Both of these issues are potential problems that become concerns as time passes. We should weigh them against any sonic benefits that may be audible immediately.