We have a state of the art sound system and should last 20+ years with no issues, but electronics fail. In nearly 1000 weddings we haven’t had any system failure. And with all state of the art systems, they require expertise to repair.  So, we ask that your DJ bring a couple speakers in their vehicle (for most, it is always there anyhow), and in the very unlikely circumstance that there is a failure, we still will have a party!