I'm not sure which Neutrik connector you're referring to. Neutrik is a company name (www.neutrik.com), and they make dozens of different kinds of audio connectors. The "Speakon" series is most suited to speaker use, and I would recommend the 4-pole series in the gold-plated version (handy if you are biwiring, or parallel the two pairs for double the current capacity-- but this does require using a wire with 4, 8, etc., conductors). I think they are superb and unfortunately overlooked by most high-end speaker manufacturers, as they are a very-high-current gas-tight connection, and incredibly convenient and reliable as well. The factory doesn't say so, but they will easily accept 10-gauge wire in each of the four connections (equivalent to 7-gauge if paralleled!), and I can't imagine anyone needing more than that.
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