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<blockquote data-quote="keep_hope_alive" data-source="post: 7392045" data-attributes="member: 576029">When looking at relay contacts, look at voltage and current separate, do not combine for wattage.You need a delay so that you fully disconnect before you make new connections.&nbsp; The switch should be done when the amp is off to prevent issues.&nbsp; I recommend separate relays for each configuration, and not to multi-purpose relays using both N.O and N.C.If it is just for competitions, I would have bolted connections on the box accessible for manual wiring.&nbsp; Relays are not that reliable and will fail. When they fail you need to wire the system so that they fail safe and that no combination of failed relays results on a short.&nbsp; This means don&#039;t use the normally open and normally closed contacts to switch between.Another option is actual switches and not relays.&nbsp; Switches would be faster than manual connections and more reliable than relays.</blockquote>

[QUOTE="keep_hope_alive, post: 7392045, member: 576029"] When looking at relay contacts, look at voltage and current separate, do not combine for wattage. You need a delay so that you fully disconnect before you make new connections. The switch should be done when the amp is off to prevent issues. I recommend separate relays for each configuration, and not to multi-purpose relays using both N.O and N.C. If it is just for competitions, I would have bolted connections on the box accessible for manual wiring. Relays are not that reliable and will fail. When they fail you need to wire the system so that they fail safe and that no combination of failed relays results on a short. This means don't use the normally open and normally closed contacts to switch between. Another option is actual switches and not relays. Switches would be faster than manual connections and more reliable than relays. [/QUOTE]

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