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<blockquote data-quote="keep_hope_alive" data-source="post: 8653957" data-attributes="member: 576029"><p>Thanks for the quick response.</p><p></p><p>You don't lose power output by daisy-chaining the RCA signals. That is what you'll want to do for multiple amps.</p><p></p><p>The issue with using a 2 channel amp on a dual 4 ohm sub is you cannot wire the amp optimally. A dual 4 ohm sub wired in parallel results in a 2 ohm mono load, and the amp can't handle that. The alternate is to wire the sub coils in series for an 8 ohm load, but at that load the amp would provide half of the power it's rated for bridged (same as a coil on each channel), and when combined with the impedance spike at fs (free-air resonance) you'll have much less power than you want for the sub. This is why I didn't recommend using the Encore amp for the sub.</p><p></p><p>I understand your planned placement now, thanks for clarifying. You can use the Kenwood for the front speakers then the Encore for the rear channels, then the Dual for the subs. The Kenwood and Encore can share the same signal and pass-through RCA is better than an RCA splitter (due to the voltage-gain relationship with head unit output impedance and amplifier input impedance). Even with a reduction of incoming voltage, the gain is actually input sensitivity which adjusts for the incoming voltage level. For example, if the head unit output is 2V than a 2V input sensitivity setting is appropriate to allow full volume use of the head unit.</p><p></p><p>I am aware you have a 4 channel amp made by Dual. I understand how it can be confusing when talking about a Dual brand 4 channel amp wired in bridged configuration to a Clarion dual 4 ohm sub (two 4 ohm coils).</p><p></p><p>The Clarion is dual voice coil with 4 ohms per coil, also referred to as dual 4 ohm. <a href="https://www.abtec.co.nz/Clarion_SRW1283_Discontinued_2007_2008_Model_" target="_blank">https://www.abtec.co.nz/Clarion_SRW1283_Discontinued_2007_2008_Model</a> That means there are four connections on the sub, positive and negative for one coil, positive and negative for the second coil. Both of these coils need to be connected. With dual 4 ohm coils, you have two wiring options to connect them to a single channel:</p><p></p><p><img src="https://rockfordfosgate.com/static/images/wiring_wizard/1_4ohmDVC_2ohm.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://rockfordfosgate.com/static/images/wiring_wizard/1_4ohmDVC_8ohm.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><a href="https://rockfordfosgate.com/support/wiring-wizard/" target="_blank">https://rockfordfosgate.com/support/wiring-wizard/</a></p><p></p><p>You can also choose to wire the sub to the Encore with one coil on channel 1 and the second coil on channel 2. </p><p></p><p>When deciding which amp to use for the sub, you compare impedance options for wiring in parallel, series, or separate. When you look at the Encore amp ratings, notice there are three values; stereo at 4 ohms, stereo at 2 ohms, or bridged at 4 ohms. Also note that the total power rating is the same for 2 ohm stereo and 4 ohm bridged, and these are both twice of the total rating at 4 ohm stereo. This is typical as it follows Ohm's Law and the most common amplifier topology. So you can choose to use the Encore amp for the sub, and you'll only be able to wire it for half of the amplifiers capability, around 150W. </p><p></p><p>You can choose to implement the 2 Farad cap. It is the least important part of the power wiring requirements when compared to how you wire and terminate power and ground cables. It doesn't matter where you put the cap since everything is already connected. One common method is to tie the cap into the distribution block. Another popular method is to put the cap right at the sub amp, but the difference between the two methods is trivial. Also note that the 2 Farad cap has much less energy storage than an AAA battery so choosing to implement it is your choice because you want to, not because it makes a huge difference. Of course, a "stiffening cap" does not replace the need for a good battery system and a good alternator. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 8653957, member: 576029"] Thanks for the quick response. You don't lose power output by daisy-chaining the RCA signals. That is what you'll want to do for multiple amps. The issue with using a 2 channel amp on a dual 4 ohm sub is you cannot wire the amp optimally. A dual 4 ohm sub wired in parallel results in a 2 ohm mono load, and the amp can't handle that. The alternate is to wire the sub coils in series for an 8 ohm load, but at that load the amp would provide half of the power it's rated for bridged (same as a coil on each channel), and when combined with the impedance spike at fs (free-air resonance) you'll have much less power than you want for the sub. This is why I didn't recommend using the Encore amp for the sub. I understand your planned placement now, thanks for clarifying. You can use the Kenwood for the front speakers then the Encore for the rear channels, then the Dual for the subs. The Kenwood and Encore can share the same signal and pass-through RCA is better than an RCA splitter (due to the voltage-gain relationship with head unit output impedance and amplifier input impedance). Even with a reduction of incoming voltage, the gain is actually input sensitivity which adjusts for the incoming voltage level. For example, if the head unit output is 2V than a 2V input sensitivity setting is appropriate to allow full volume use of the head unit. I am aware you have a 4 channel amp made by Dual. I understand how it can be confusing when talking about a Dual brand 4 channel amp wired in bridged configuration to a Clarion dual 4 ohm sub (two 4 ohm coils). The Clarion is dual voice coil with 4 ohms per coil, also referred to as dual 4 ohm. [URL="https://www.abtec.co.nz/Clarion_SRW1283_Discontinued_2007_2008_Model_"]https://www.abtec.co.nz/Clarion_SRW1283_Discontinued_2007_2008_Model[/URL] That means there are four connections on the sub, positive and negative for one coil, positive and negative for the second coil. Both of these coils need to be connected. With dual 4 ohm coils, you have two wiring options to connect them to a single channel: [IMG]https://rockfordfosgate.com/static/images/wiring_wizard/1_4ohmDVC_2ohm.png[/IMG] [IMG]https://rockfordfosgate.com/static/images/wiring_wizard/1_4ohmDVC_8ohm.png[/IMG] [URL="https://rockfordfosgate.com/support/wiring-wizard/"]https://rockfordfosgate.com/support/wiring-wizard/[/URL] You can also choose to wire the sub to the Encore with one coil on channel 1 and the second coil on channel 2. When deciding which amp to use for the sub, you compare impedance options for wiring in parallel, series, or separate. When you look at the Encore amp ratings, notice there are three values; stereo at 4 ohms, stereo at 2 ohms, or bridged at 4 ohms. Also note that the total power rating is the same for 2 ohm stereo and 4 ohm bridged, and these are both twice of the total rating at 4 ohm stereo. This is typical as it follows Ohm's Law and the most common amplifier topology. So you can choose to use the Encore amp for the sub, and you'll only be able to wire it for half of the amplifiers capability, around 150W. You can choose to implement the 2 Farad cap. It is the least important part of the power wiring requirements when compared to how you wire and terminate power and ground cables. It doesn't matter where you put the cap since everything is already connected. One common method is to tie the cap into the distribution block. Another popular method is to put the cap right at the sub amp, but the difference between the two methods is trivial. Also note that the 2 Farad cap has much less energy storage than an AAA battery so choosing to implement it is your choice because you want to, not because it makes a huge difference. Of course, a "stiffening cap" does not replace the need for a good battery system and a good alternator. :) [/QUOTE]
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