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<blockquote data-quote="Prowler573" data-source="post: 1401017" data-attributes="member: 561023">Do either of your amps have a preamp output? Your head unit only has two sets of preamp outputs - and it stating that it has a subwoofer level control indicates to me that the rear RCA preamp outputs on the head unit are selectable between rear and subwoofer output.Read through the manual to see if there is any mention of such a thing. If I&#039;m right and the rear RCA outputs are switchable to a subwoofer output then only in that mode will the subwoofer level control function and no, it wouldn&#039;t affect the bass in your speakers unless the amp this output is connected to is driving your speakers rather than your subs.The preferred method would be to use a head unit with three sets of preamp outputs, one being a dedicated sub output - but that option isn&#039;t open to us using the one you have specified.You can do this a couple of different ways:(1) Connect the front and rear preouts from the head unit both to your four channel amp. This will retain your fadar functionality. (This method only works assuming that your 4ch amp has a set of RCA outputs to daisy-chain the bass amp to) Then hook the bass amp up to the 4-channel unit&#039;s RCA outs, get the crossover and gains set correctly and call it a day. You&#039;ll have no direct control over the sub level this way but I&#039;d rather have fadar control than sub control if I had to pick one or the other.(2) Connect the front RCA output from the head unit to your 4-channel amp and if it won&#039;t output on all four channels with only a two-channel input then get some Y-splitters to give it all four inputs. Turn the other set of outputs into a sub output and connect these to your bass amp. You&#039;ll have no fadar control but you will have direct level adjustment for your subs.The above methods are suggested making a lot of assumptions about your amps that I am not completely certain are even an avaiable option to you - I don&#039;t know what specific amps we&#039;re talking about here so it&#039;s a matter of &quot;If ____, then ____&quot;Hope I&#039;ve helped in some small way rather than confused you further.</blockquote>

[QUOTE="Prowler573, post: 1401017, member: 561023"] Do either of your amps have a preamp [I]output[/I]? Your head unit only has two sets of preamp outputs - and it stating that it has a subwoofer level control indicates to me that the rear RCA preamp outputs on the head unit are selectable between rear and subwoofer output. Read through the manual to see if there is any mention of such a thing. If I'm right and the rear RCA outputs are switchable to a subwoofer output then [I]only in that mode[/I] will the subwoofer level control function and no, it wouldn't affect the bass in your speakers unless the amp this output is connected to is driving your speakers rather than your subs. The preferred method would be to use a head unit with three sets of preamp outputs, one being a dedicated sub output - but that option isn't open to us using the one you have specified. You can do this a couple of different ways: (1) Connect the front and rear preouts from the head unit both to your four channel amp. This will retain your fadar functionality. (This method only works assuming that your 4ch amp has a set of RCA outputs to daisy-chain the bass amp to) Then hook the bass amp up to the 4-channel unit's RCA outs, get the crossover and gains set correctly and call it a day. You'll have no direct control over the sub level this way but I'd rather have fadar control than sub control if I had to pick one or the other. (2) Connect the front RCA output from the head unit to your 4-channel amp and if it won't output on all four channels with only a two-channel input then get some Y-splitters to give it all four inputs. Turn the other set of outputs into a sub output and connect these to your bass amp. You'll have no fadar control but you will have direct level adjustment for your subs. The above methods are suggested making a lot of assumptions about your amps that I am not completely certain are even an avaiable option to you - I don't know what specific amps we're talking about here so it's a matter of "If ____, then ____" Hope I've helped in some small way rather than confused you further. [/QUOTE]

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