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<blockquote data-quote="thch" data-source="post: 1806664" data-attributes="member: 562032">any filtering (crossover) the HU has would be applied to all speakers on the affected channels.&nbsp; eg, putting a highpass filter on the front channels would remove bass (and maybe midrange) from the front speakers.thus even if the HU has a crossover option, it will not be useful.the tweeters probably have inline &quot;passive&quot; crossovers that do the filtering.some of the cheap peizo tweeters don&#039;t actually need crossovers or have them built in.&nbsp; i forget why, it was something i read.&nbsp; i don&#039;t use peizo tweeters, so i didn&#039;t commit it fully to memory.the tweeters shouldn&#039;t be run off the subwoofer amp.&nbsp; the sub amp hopefully is using a lowpass filter.&nbsp; this filter removes vocals and trebel.&nbsp; thus the tweeters wouldn&#039;t be able to play anything.what is &quot;lume&quot;?&nbsp; i&#039;ve heard of &quot;boot&quot;, but not lume.</blockquote>

[QUOTE="thch, post: 1806664, member: 562032"] any filtering (crossover) the HU has would be applied to all speakers on the affected channels. eg, putting a highpass filter on the front channels would remove bass (and maybe midrange) from the front speakers. thus even if the HU has a crossover option, it will not be useful. the tweeters probably have inline "passive" crossovers that do the filtering. some of the cheap peizo tweeters don't actually need crossovers or have them built in. i forget why, it was something i read. i don't use peizo tweeters, so i didn't commit it fully to memory. the tweeters shouldn't be run off the subwoofer amp. the sub amp hopefully is using a lowpass filter. this filter removes vocals and trebel. thus the tweeters wouldn't be able to play anything. what is "lume"? i've heard of "boot", but not lume. [/QUOTE]

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