No use for the passive in this case. Run each mid and tweeter to a single channel of the amp. Use the dsp to manage the crossover, eq and TA settings for each channel.

Any reason you're going from the Alpine to the PPI?

 

Any reason you're going from the Alpine to the PPI?

I am going to try using the alpine unit for this setup, but if satisfactory results cannot be achieved in an ordinate amount of time then the PPI unit seems to be the one for me. Soundstream seems to have an almost identical unit to the PPI unit also...

 

I haven't used either, but it looks like the h650 and DEQ8 both include active crossovers. So, unless you're also using the processor to filter, delay and EQ a subwoofer, you won't need passive crossovers or DC blockers.
To take full advantage of DSP, you'll want to go full active regardless.

 

There will also be class d amp/subs running active off the DSP unit. The alpine has 3 sets of stereo outputs (Front 1, Front 2, Rear) and a mono output for sub stage. My plan was to run the front tweeters from "Front 1" to channel 1+2 on amp, front midranges to "Front 2" to channels 3+4 on amp, and the substage would be connected to the mono sub out. In the future I would connect the "Rear" outputs on the DSP to a 2 channel amp driving a pair of dedicated midbass woofers.

 

I don't think the Alpine is 3 way capable, so your future planned use of the rear output may be misplaced. Otherwise, ur good to go.

 

Yep, mids to one set of channels and tweeters on the other. And the bass/dc blockers (in case you aren't aware) are just capacitors. I set mine up to provide a first order roll off starting about an octave and a half below my crossover point. though I tend to run 24db per octave crossovers. If you are doing a shallower crossover, they will need to be further down then that.

 

Keep the capacitors (DC blockers, bass blockers, whatever you want to call them) in place as a bit of insurance in case you mess up a setting in the DSP. You don't want to accidentally send a full range signal to them. You could also use the high-pass crossover on the amp somewhere low where it won't interfere with the usable response like 1khz as a bit of protection.

You won't need the passives. You can control the level of the tweeters and mids independently through the DSP or by turning the gain down on the amp channels.

 

Definitely put some caps on the tweeters for protection. Also the H650 is an Imprint processor. When you run a calibration sweep the H650 will ignore the high pass crossover you have set on the tweeters and run the signal to a far lower frequency than I was comfortable with for my tweeters.

After reading the specs on the Alpine PXE-H650, I don't see why you couldn't use it for dedicated mid-bass drivers.

Time Delay: Each of the seven output channels can have additional signal delay assigned; 0 to 10ms in 0.1ms steps.

Use the high pass crossover to provide mid-bass protection, a mid sonic filter so to speak.
Use the amplifier crossover for the low pass crossover.

Where will the tweeters, mid and future mid-bass woofer be located?

I have run the H650 in a 3 way plus sub configuration before. As MetricMuscle already said you will need an external crossover for the midbass Low Pass Filter as there isn't one on the Rear channels of the H650. Also the High Pass Filter on the Front2 channels only go as high as 200Hz. So you may also need an external crossover if you intend to HP the mids above 200Hz.

 

Ok, so to review what has been said thus far:

-In my setup that I am going for I do not need the included passive Xovers for ANYTHING. They are going to become paperweights... Oh well, worse has happened in the history of car audo.

-My front tweets become channel 1+2 on the amp, with appropriate cap inline to achieve necessary protection from turn on pops, etc

-My front mids become channel 3+4

-All Xover points will be made with the DSP (additional adjustments on amps themselves, but if I am going "active", why would I want to utilize this? I don;t think I would...)


Correct?

 

Correct?

Exactly.

 

Alright. Thank you all for your time on this matter.

Respect.

 

I picked the alpine up for $150, so I figured it was worth a shot!

 

Their website shows 3way plus mono sub.

 

http://www.diymobileaudio.com/forum...cal-advanced-car-audio-discussion/56867-3-way-active-front-alpine-pxe-h650.html

I don't think its how it was designed. Maybe possible to fool it into doing it.