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Discussion Starter #1
Repost from SQ forum. I imagine this is a more appropriate forum for this topic

Hi all, I have most of my equipment in hand for a medium budget, not-quite-top-shelf quality build. I have a set of dynaudio 6 1/2 woofers for the front doors and am shopping 5 1/4 components for my q-logic kick panel enclosures (recommendations in the $200-300 range?) I'd like a 3-way setup, obviously. I'm pretty well spent out though so I'd prefer to grab a medium priced set of 2-way components and use my Alpine PDX amp's Hi/Lo crossovers for channel separation. That would make for 150w RMS to the midbass and 150w to the 2-way component set (I like my bass). This would obviate the necessity of purchasing a separate 3-way passive crossover. I'll be running Imprint off my Alpine iDA headunit and h100 module. Sub bass is handled by a sealed Alpine type R 12” at 600w RMS. A few issues that come to mind:

1. I’ll need a separate high-pass run on the midbass woofers to keep sub-bass frequencies out, though I do plan to run it as low as 60Hz if they’ll take it.

2. Where to begin crossing over? The Amplifier’s crossovers go up to 400Hz. I’m thinking 250-300Hz???

3. What about running a spare pair of passive crossovers I have laying around and running both the midbass woofer and kick-panel-mounted midrange woofer at the full range provided by their respective crossovers? Amplified the same as before.

4. Is any of this even a good idea? Alternatives?

I’ve considered running both the door and kick-panel woofers at full range, assigning the doors to the rear channel output and letting the Imprint multiEQ software sort out the rest. I’m leaving the stock rear speakers fed off the headunit’s internal amp; not so much for imaging as, well, I just don’t like it when the sound is entirely from upfront.
 

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I've thought of doing something similar 2 way components (Passive) + 6.5" Mid bass off a different amp. Looking forward on your responses.
 

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You dont want to run the midbass full range you'll get alot of problems and it will sound like ****.
Your gonna need a way to bandpass the midbass. for this you will need a seperate cross over and some sort of dsp would be nice too.
 

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Discussion Starter #4
Yeah, I've got an Imprint module for a dsp which should allow me to high pass out the sub frequencies and round out a bandpass using the amplifier's crossover. I'll be using Imprint's autoEQ to take care of time delay and such so I think running the amplifier with a little more overlap and letting the software fine tune things should work. I guess stopping at around 250-300 Hz would be ideal for the midbass to midrange transition but I'm sure it will take some fiddling.

The doors will be well sealed and deadened. I'm considering a set of Polk mm5251 5.25 components for the kick panels. Interestingly they're 2.7 ohms and slightly more efficient (if the specs are to be trusted) than the dyns, which run at 4 ohms. Not sure if they'll mesh well considering those discrepancies but I loved the sound of these things for the music I listen to -- and the price is right. Does anyone have any suggestions for reasonably priced 5.25 components that would blend well with the dyns?
 
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