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<blockquote data-quote="nags" data-source="post: 8759259" data-attributes="member: 595338">I&#039;ve got an Arc X2 850.5 Amplifier powering a set of Hertz MPK 163.5 PRO&#039;s in the front and a set of Hertz MPX 690.3 PRO&#039;s in the back.&nbsp; I think I&#039;m underpowering both of these and would like to bridge the amp to just power the 163.5&#039;s and eliminate the 690.3&#039;s in the back.&nbsp; I understand I use the positive and negative from 1/2 and 3/4 combined to go out to the front speakers.&nbsp; But I&#039;m unsure what to do with the RCA inputs on the amp.&nbsp; I&#039;ve included links to everything below;Amp;[URL unfurl=&quot;true&quot;]https://www.arcaudio.com/x2-series-amplifiers[/URL]Hertz MPK 163.5 PRO;[URL unfurl=&quot;true&quot;]https://www.hertzaudiovideo.com/car-audio-speakers-system-mille-pro-mpk163-3/[/URL]Hertz MPX 690.3 PRO;[URL unfurl=&quot;true&quot;]https://www.hertzaudiovideo.com/car-audio-coaxials-mille-pro-mpx690-3/[/URL][ATTACH=full]31815[/ATTACH]</blockquote>

[QUOTE="nags, post: 8759259, member: 595338"] I've got an Arc X2 850.5 Amplifier powering a set of Hertz MPK 163.5 PRO's in the front and a set of Hertz MPX 690.3 PRO's in the back. I think I'm underpowering both of these and would like to bridge the amp to just power the 163.5's and eliminate the 690.3's in the back. I understand I use the positive and negative from 1/2 and 3/4 combined to go out to the front speakers. But I'm unsure what to do with the RCA inputs on the amp. I've included links to everything below; Amp; [URL unfurl="true"]https://www.arcaudio.com/x2-series-amplifiers[/URL] Hertz MPK 163.5 PRO; [URL unfurl="true"]https://www.hertzaudiovideo.com/car-audio-speakers-system-mille-pro-mpk163-3/[/URL] Hertz MPX 690.3 PRO; [URL unfurl="true"]https://www.hertzaudiovideo.com/car-audio-coaxials-mille-pro-mpx690-3/[/URL] [ATTACH type="full" alt="31815"]31815[/ATTACH] [/QUOTE]

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