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Message: <blockquote data-quote="6UE5t" data-source="post: 1064374414" data-attributes="member: 103722">I'm no ICE sifu but here are my thoughts:1. Since your HU only has 1 pair of RCA but you want to power 2 amps now, that means you need to split out the RCA using a Y branch/connector, one going to the 4 channel amp and the other to the 2 channel for the sub. Note that your 4 channel amp should have the capability to play all 4 with only 2 channel input (or else you'd need another Y branch). Note also this is normally not recommended since it will reduce the voltage output from the HU so quality & power would not be as good. Then you'd also need to reroute the speaker wires. Another option is to use the RCA only to drive the 4 channel amp and use the HU speaker output to drive the sub amp (if the amp has this capability) but again this is also not recommended since line speaker output is already more distorted.2. Depends on your component speaker. If much better quality than the current then you can hear the difference. Also have to note the continuous (RMS) power handling of the speaker compared to your HU output. If your component system has >50W rms, then better to drive using amp since normally HU output is only 20-25W rms with max 40-50W at best.My suggestion is to change your HU first with at least one with 4 channel and minimal 4V RCA output. Use channel 1 & 2 to drive the component and channel 3 & 4 to drive the sub, leave the rear without power amp (drive them straight from the HU). This will give a lot more improvement and more tuning capability/flexibility. Btw ICE sifus can CMIIW since my knowledge is very minimal here.</blockquote>

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