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<blockquote data-quote="DarkScorpion" data-source="post: 7238361" data-attributes="member: 618537">With that amp, both, the HPF and the LPF should have two frequency options available each, &quot;high&quot; and &quot;low,&quot; from which you can choose the filter. Check out the manual: <a href="http://images.kenwood.eu/files/prod/747/5/KAC-PS4D_(EN" target="_blank">http://images.kenwood.eu/files/prod/747/5/KAC-PS4D_(EN</a>).pdfLook on page 5, the second picture &quot;2-channel system&quot; - this is what the switches should look like. Then look at page 8 - you can see more clearly where the LPF, ISD, and HPF settings are listed - those are basically all the choices you have for your filters (wherever there is an &quot;o&quot;).That is EXACTLY how you would set it up for a 2-way front. Except, of course, you would choose a different frequency for the HPF (for the tweets) and the LPF (for the mids). You would also set an infrasonic filter, which will effectively make channel B bandpassed.It&#039;s a bit tricky to use this amp for a 3-way front configuration. You really would have to use a combo active-passive configuration, like you suggested. Basically, you would have it set up like this: midbass on channel B, bandpassed via the amp; passive crossover attached to channel A (with a HPF on the amp), midrange and tweets conected to a passive crossover separating their respective frequencies. In theory, there&#039;s nothing wrong with it, but in practice, it can be annoying if you want to play with the frequencies in order to really &quot;find&quot; the crossover points that work the best for your speakers.However, it is doable. You&#039;d definitely need a separate amp for the TB subs, which is to be expected. However, they don&#039;t need much power at all, which is a plus, so you can pretty much get any amp that you want. If you can find the matching mono-channel amp for your KAC, that&#039;d be pretty cool for the sake of aesthetics. You could wire a pair of them in series to 8ohm (if I&#039;m thinking of the TB subs you&#039;re thinking of) to keep the amount of power running to them from being too high and keeping current draw in check if you don&#039;t intend on upgrading your electrical system.</blockquote>

[QUOTE="DarkScorpion, post: 7238361, member: 618537"] With that amp, both, the HPF and the LPF should have two frequency options available each, "high" and "low," from which you can choose the filter. Check out the manual: [URL="http://images.kenwood.eu/files/prod/747/5/KAC-PS4D_(EN"]http://images.kenwood.eu/files/prod/747/5/KAC-PS4D_(EN[/URL]).pdf Look on page 5, the second picture "2-channel system" - this is what the switches should look like. Then look at page 8 - you can see more clearly where the LPF, ISD, and HPF settings are listed - those are basically all the choices you have for your filters (wherever there is an "o"). That is EXACTLY how you would set it up for a 2-way front. Except, of course, you would choose a different frequency for the HPF (for the tweets) and the LPF (for the mids). You would also set an infrasonic filter, which will effectively make channel B bandpassed. It's a bit tricky to use this amp for a 3-way front configuration. You really would have to use a combo active-passive configuration, like you suggested. Basically, you would have it set up like this: midbass on channel B, bandpassed via the amp; passive crossover attached to channel A (with a HPF on the amp), midrange and tweets conected to a passive crossover separating their respective frequencies. In theory, there's nothing wrong with it, but in practice, it can be annoying if you want to play with the frequencies in order to really "find" the crossover points that work the best for your speakers. However, it is doable. You'd definitely need a separate amp for the TB subs, which is to be expected. However, they don't need much power at all, which is a plus, so you can pretty much get any amp that you want. If you can find the matching mono-channel amp for your KAC, that'd be pretty cool for the sake of aesthetics. You could wire a pair of them in series to 8ohm (if I'm thinking of the TB subs you're thinking of) to keep the amount of power running to them from being too high and keeping current draw in check if you don't intend on upgrading your electrical system. [/QUOTE]

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