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<blockquote data-quote="fly_marlin" data-source="post: 8386882" data-attributes="member: 660781">You don&#039;t need both because you run 2 subs. Each output from the deck has voltage, so you&#039;re supplying a stronger signal to the amp by having both RCAs connected. You don&#039;t need 8. 1 sub output is enough for all subs you&#039;re running. For the speakers, you need 1 ch per speaker. Should be pretty straight forward.Use the x-overs on your amp. Most HUs don&#039;t have continuously variable x-overs - only present frequencies. Once you get the x-over point to your liking on the amps, you can just leave it alone. As for the bass boost - there are different opinions on it. Some use it, some avoid it like a plague. It&#039;s a boost at 45Hz with up to 18db gain. I set mine around 6db. There is really no &quot;right&quot; setting for it, but I don&#039;t recommend setting it to max. Once you set the x-overs, you can mess with the bass boost and see what level best suits you.</blockquote>

[QUOTE="fly_marlin, post: 8386882, member: 660781"] You don't need both because you run 2 subs. Each output from the deck has voltage, so you're supplying a stronger signal to the amp by having both RCAs connected. You don't need 8. 1 sub output is enough for all subs you're running. For the speakers, you need 1 ch per speaker. Should be pretty straight forward. Use the x-overs on your amp. Most HUs don't have continuously variable x-overs - only present frequencies. Once you get the x-over point to your liking on the amps, you can just leave it alone. As for the bass boost - there are different opinions on it. Some use it, some avoid it like a plague. It's a boost at 45Hz with up to 18db gain. I set mine around 6db. There is really no "right" setting for it, but I don't recommend setting it to max. Once you set the x-overs, you can mess with the bass boost and see what level best suits you. [/QUOTE]

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