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<blockquote data-quote="jeffandpamsmith" data-source="post: 6190476" data-attributes="member: 613164">This is my first post, so be gentle.&nbsp; I tried reading and searching, even called Alpine, and I&#039;m still not sure (Alpine guy didn&#039;t sound sure either).Head unit is Pioneer Premier FH-P800BT, amp is Alpine PDX 4.100. Installing in a Smart Cabriolet (you know, the 8 1/2 foot car - don&#039;t laugh - its a great car).&nbsp; Speakers are one pair component Focal Access 165 A1, and JL Audio 8&quot; W3V3 4 sub (yes it fits, and you can&#039;t even see the box without trying hard)I&#039;m doing this myself, and am trying to &quot;measure twice - cut once&quot; ... so to speak.I have everything figured out and wired so far (I think) but the last step is hooking up the Pioneer sub out to the amp.&nbsp; I can&#039;t figure it out from the Pioneer manual, nor the Alpine.Channels 1 and 2 on the Alpine are for the Focal speakers.&nbsp; Channels 3 and 4 on the Alpine are going to be bridged for the sub.&nbsp; Both the Smart aftermarket place where I bought the stuff online, and Alpine say to hook the + speaker lead from the sub to the + output on the Alpine for channel 3.&nbsp; Then hook the - speaker lead on the sub to the - amp out for channel 4.&nbsp; They both say I don&#039;t need to do anything else to bridge the amp.I didn&#039;t know to ask, but the Pioneer has 2 sub out RCAs, and the Alpine has RCAs in for both channel 3 and channel 4.&nbsp; Since the channels are bridged, how do I configure the RCAs?Do I need to use both sub outs on the Pioneer to get all the sub signal?&nbsp; If not, which one do I use - L or R?&nbsp; Then on the Amp, do I need RCAs in to just 1 channel (either 3 or 4) and is so, which?&nbsp; Or do I hook up both sub outs on the Pioneer to both channels on the amp?Alpine waffled (and this was their tech guy).&nbsp; He agreed on the output from amp to speaker/sub, but seemed to wander around on the RCA issue...saying that only 1 would probably be needed, then talked about using a &quot;Y&quot; connector to get both input RCAs into 1 amp channel, but didn&#039;t specify amp channel 3 or 4.&nbsp; Then he said I could run both, but prob didnt need to.&nbsp; I&#039;m confused and don&#039;t want to power anything up till I hear from someone who knows more than me.The sales place in CA (I&#039;m on the other coast) was hard to get to talk to their installers, but I will call them tomorrow, I want to learn more if I can.</blockquote>

[QUOTE="jeffandpamsmith, post: 6190476, member: 613164"] This is my first post, so be gentle. I tried reading and searching, even called Alpine, and I'm still not sure (Alpine guy didn't sound sure either). Head unit is Pioneer Premier FH-P800BT, amp is Alpine PDX 4.100. Installing in a Smart Cabriolet (you know, the 8 1/2 foot car - don't laugh - its a great car). Speakers are one pair component Focal Access 165 A1, and JL Audio 8" W3V3 4 sub (yes it fits, and you can't even see the box without trying hard) I'm doing this myself, and am trying to "measure twice - cut once" ... so to speak. I have everything figured out and wired so far (I think) but the last step is hooking up the Pioneer sub out to the amp. I can't figure it out from the Pioneer manual, nor the Alpine. Channels 1 and 2 on the Alpine are for the Focal speakers. Channels 3 and 4 on the Alpine are going to be bridged for the sub. Both the Smart aftermarket place where I bought the stuff online, and Alpine say to hook the + speaker lead from the sub to the + output on the Alpine for channel 3. Then hook the - speaker lead on the sub to the - amp out for channel 4. They both say I don't need to do anything else to bridge the amp. I didn't know to ask, but the Pioneer has 2 sub out RCAs, and the Alpine has RCAs in for both channel 3 and channel 4. Since the channels are bridged, how do I configure the RCAs? Do I need to use both sub outs on the Pioneer to get all the sub signal? If not, which one do I use - L or R? Then on the Amp, do I need RCAs in to just 1 channel (either 3 or 4) and is so, which? Or do I hook up both sub outs on the Pioneer to both channels on the amp? Alpine waffled (and this was their tech guy). He agreed on the output from amp to speaker/sub, but seemed to wander around on the RCA issue...saying that only 1 would probably be needed, then talked about using a "Y" connector to get both input RCAs into 1 amp channel, but didn't specify amp channel 3 or 4. Then he said I could run both, but prob didnt need to. I'm confused and don't want to power anything up till I hear from someone who knows more than me. The sales place in CA (I'm on the other coast) was hard to get to talk to their installers, but I will call them tomorrow, I want to learn more if I can. [/QUOTE]

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