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Active vs. Passive: An attempt by me to explain
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<blockquote data-quote="de8212" data-source="post: 5239717" data-attributes="member: 545055"><p>I'm looking into this but not sure if my headunit will work.</p><p></p><p>it's an alpine 7894. Looking at the manual it says it has a built in crossover</p><p></p><p><em>HPF (Setting the High Pass Filter):</em></p><p></p><p><em>FLAT (OFF) ↔ 80Hz ↔ 120Hz ↔160Hz</em></p><p></p><p><em>Outputs all frequencies higher than that selected</em></p><p></p><p><em>according to your preference</em></p><p></p><p>and</p><p></p><p><em>LPF(Setting the Low Pass Filter):</em></p><p></p><p><em>FLAT (OFF) ↔ 80Hz ↔ 120Hz ↔160Hz</em></p><p></p><p><em>Outputs all frequencies lower than that selected</em></p><p></p><p><em>according to your preference.</em></p><p></p><p><em>(Only available when using the subwoofer output from</em></p><p></p><p><em>this unit.)</em></p><p></p><p>Since I am not running a sub that would make the LPF option not applicable.</p><p></p><p>So, that leaves me with only HPF. But I have a 4 channel amp and would need seperate settings for the front two and rear two, right????</p><p></p><p>Also, I though I read somewhere (maybe earlier in this thread) where the settings were changed in db's? but mine are settings for Hz????</p><p></p><p>I'm assuming my Alpine just won't do it. Anyone know for sure?</p><p></p><p>Here's alink to their manual.</p><p></p><p><a href="http://akamaipix.crutchfield.com/Manuals/500/500CDA7894.PDF" target="_blank">http://akamaipix.crutchfield.com/Manuals/500/500CDA7894.PDF</a></p></blockquote><p></p>
[QUOTE="de8212, post: 5239717, member: 545055"] I'm looking into this but not sure if my headunit will work. it's an alpine 7894. Looking at the manual it says it has a built in crossover [I]HPF (Setting the High Pass Filter):[/I] [I]FLAT (OFF) ↔ 80Hz ↔ 120Hz ↔160Hz[/I] [I]Outputs all frequencies higher than that selected[/I] [I]according to your preference[/I] and [I]LPF(Setting the Low Pass Filter):[/I] [I]FLAT (OFF) ↔ 80Hz ↔ 120Hz ↔160Hz[/I] [I]Outputs all frequencies lower than that selected[/I] [I]according to your preference.[/I] [I](Only available when using the subwoofer output from[/I] [I]this unit.)[/I] Since I am not running a sub that would make the LPF option not applicable. So, that leaves me with only HPF. But I have a 4 channel amp and would need seperate settings for the front two and rear two, right???? Also, I though I read somewhere (maybe earlier in this thread) where the settings were changed in db's? but mine are settings for Hz???? I'm assuming my Alpine just won't do it. Anyone know for sure? Here's alink to their manual. [URL="http://akamaipix.crutchfield.com/Manuals/500/500CDA7894.PDF"]http://akamaipix.crutchfield.com/Manuals/500/500CDA7894.PDF[/URL] [/QUOTE]
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Active vs. Passive: An attempt by me to explain
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