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On Axis vs Off Axis Response Curve
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<blockquote data-quote="keep_hope_alive" data-source="post: 7842497" data-attributes="member: 576029"><p>if you don't use the passive crossovers, and you want to run active, you need to have one of three things:</p><p></p><p>1. a head unit that is capable of 3-way active.</p><p></p><p>2. an amplifier with electronic crossovers that provide a high pass filter at or above 3kHz. this is not a common feature.</p><p></p><p>3. an external processor or electronic crossover that goes between the head unit and amplifier.</p><p></p><p>in all three cases, the tweeters are on their own amplifier channel.</p><p></p><p>to run an active 2-way up front, plus full range in rear you need 6 amplifier channels.</p><p></p><p>it is fine to run an 8 ohm tweeter. the amp will like that load. tweeters are more efficient so they need much less power anyway.</p><p></p><p>The Alpine PDX-F6 is not capable of powering tweeters directly. You would need an electronic crossover in addition to that amplifier.</p><p></p><p>you don't need rear speakers. they won't benefit the passengers. they add complexity and cost (especially amplifier cost).</p><p></p><p>describe what else the system will comprise of, the vehicle (year/make/model/trim), and who will be performing the install.</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 7842497, member: 576029"] if you don't use the passive crossovers, and you want to run active, you need to have one of three things: 1. a head unit that is capable of 3-way active. 2. an amplifier with electronic crossovers that provide a high pass filter at or above 3kHz. this is not a common feature. 3. an external processor or electronic crossover that goes between the head unit and amplifier. in all three cases, the tweeters are on their own amplifier channel. to run an active 2-way up front, plus full range in rear you need 6 amplifier channels. it is fine to run an 8 ohm tweeter. the amp will like that load. tweeters are more efficient so they need much less power anyway. The Alpine PDX-F6 is not capable of powering tweeters directly. You would need an electronic crossover in addition to that amplifier. you don't need rear speakers. they won't benefit the passengers. they add complexity and cost (especially amplifier cost). describe what else the system will comprise of, the vehicle (year/make/model/trim), and who will be performing the install. [/QUOTE]
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On Axis vs Off Axis Response Curve
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