They fit my amp perfectly and allowed cool air to circulate under my amps. They're the PERFECT size. I'll isolate everything, but that wasn't my primary goal. With a small clamp load they will be well insulated. For example for home audio-video repeaters and the like. I used 8 black, 4 on each side of my 3500.1 amp and 4 gold, 2 on each side, on my 800 watt 4ch. You are strong. wanted that. There isn't a big one.
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