Is there a way to make unused quarter inch inputs on a speaker cabinet airtight, but still usable? I use Speakon connectors to connect to my cab and don't plan on using the 1/4" connectors, but I can envision some weird scenario where I might need them down the road in a crunch. Otherwise, I just plug them with a silicone sealant and forget them. A surprising amount of air blows through these things when I'm pounding my bass. I'm thinking sealing them off might tighten things up (even more).