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General Car Audio
2015 Tacoma Speaker Pods
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<blockquote data-quote="Doxquzme" data-source="post: 8859133" data-attributes="member: 689267"><p>I would think (not knowing what the head unit output is) that it's never a great idea to use one's HU in combination with a much more powerful amp for driving anything other than maybe a highly efficient set of tweeters crossed appropriately and IMHO, definitely NOT a set of full range speakers, even just for fill. Not sure what the goal is, but you can (or I can help) design a two-way crossover for anything you end up wanting to do. I would definitely use the AC amp for everything you mentioned here. It's a rather underrated little amp and its output in 4-channel mode or bridged is likely going to dwarf anything the HU uses.</p><p></p><p>Assuming the 6.5" drivers are both 4 ohms and you are considering running them parallel (2 ohms to the amp) you'll have to run the amp in 4 channel mode as the minimum load on this AC amp is 4 ohms in bridged mode. If the output of the HU is in the 40watt range (Unusual) you could run 2 channels of the AC amp to the rears (at 4 ohms), 2 channels to the front dual 6.5" drivers at 2ohms a side, and run the output from the HU to the tweeters up front. In order to configure the high pass crossover (bass blocker=high pass crossover) for the tweeters, would just need to know which tweeters you intend to use and I could design a simple 12 or 18db crossover circuit to wire inline with the tweeters to give the desired frequency. Depending on the 6.5" drivers used, you should be able to set the xover on the amp (subsonic) and let them roll off naturally. In any case, the xover points will depend on the drivers used, more specifically, how low the tweeter can be crossed at.</p><p></p><p>Again, unless there is a good amount of wattage coming from the HU (at least 15- 20 watts) then even the tweeter thing is a no-go for me. Personally, I would run everything off the AC amp in 4-channel mode using a passive crossover up front.</p></blockquote><p></p>
[QUOTE="Doxquzme, post: 8859133, member: 689267"] I would think (not knowing what the head unit output is) that it's never a great idea to use one's HU in combination with a much more powerful amp for driving anything other than maybe a highly efficient set of tweeters crossed appropriately and IMHO, definitely NOT a set of full range speakers, even just for fill. Not sure what the goal is, but you can (or I can help) design a two-way crossover for anything you end up wanting to do. I would definitely use the AC amp for everything you mentioned here. It's a rather underrated little amp and its output in 4-channel mode or bridged is likely going to dwarf anything the HU uses. Assuming the 6.5" drivers are both 4 ohms and you are considering running them parallel (2 ohms to the amp) you'll have to run the amp in 4 channel mode as the minimum load on this AC amp is 4 ohms in bridged mode. If the output of the HU is in the 40watt range (Unusual) you could run 2 channels of the AC amp to the rears (at 4 ohms), 2 channels to the front dual 6.5" drivers at 2ohms a side, and run the output from the HU to the tweeters up front. In order to configure the high pass crossover (bass blocker=high pass crossover) for the tweeters, would just need to know which tweeters you intend to use and I could design a simple 12 or 18db crossover circuit to wire inline with the tweeters to give the desired frequency. Depending on the 6.5" drivers used, you should be able to set the xover on the amp (subsonic) and let them roll off naturally. In any case, the xover points will depend on the drivers used, more specifically, how low the tweeter can be crossed at. Again, unless there is a good amount of wattage coming from the HU (at least 15- 20 watts) then even the tweeter thing is a no-go for me. Personally, I would run everything off the AC amp in 4-channel mode using a passive crossover up front. [/QUOTE]
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