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<blockquote data-quote="themastert" data-source="post: 7158636" data-attributes="member: 629456">My Pioneer head unit (DEHP3100UB) has 2 sets of RCA&#039;s.&nbsp; However one set is used for my amplifier powering my subs.&nbsp; I have that variable preamp setting in my head unit so that I can use those RCA&#039;s as a subwoofer preamp instead of a regular 4 channel preamp.&nbsp; Well now I want to hook up more amps to my head unit but I don&#039;t know how to go about doing that.On a separate note, can I splice the control wire of one amp into the other?Do I have to run a separate ground for the second amp or can I piggyback it into the other amp&#039;s ground?I am going for vintage sound so I have 2 Blaupunkt amps from 1987 and I have very little knowledge on them.&nbsp; I do know they work as they were tested.&nbsp; The one I am currently attempting to hook up is the BPA-2120b.Thank you so much for your time,Themastert</blockquote>

[QUOTE="themastert, post: 7158636, member: 629456"] My Pioneer head unit (DEHP3100UB) has 2 sets of RCA's. However one set is used for my amplifier powering my subs. I have that variable preamp setting in my head unit so that I can use those RCA's as a subwoofer preamp instead of a regular 4 channel preamp. Well now I want to hook up more amps to my head unit but I don't know how to go about doing that. On a separate note, can I splice the control wire of one amp into the other? Do I have to run a separate ground for the second amp or can I piggyback it into the other amp's ground? I am going for vintage sound so I have 2 Blaupunkt amps from 1987 and I have very little knowledge on them. I do know they work as they were tested. The one I am currently attempting to hook up is the BPA-2120b. Thank you so much for your time, Themastert [/QUOTE]

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