Active Setup Help.......

[F150Truck'in 10+ year member]

Ok, heres the deal......

I've not new to mobile audio by a long shot... but am setting up my first Active System, I've talked to Don and we came up with a Basic Setup for the Alto.... But he's a busy man and has a business to run, I can't and will not keep bugging him with every question I have....

But, I want to see what other recommendations people have on my system.. I know its my ear and its what sounds good to me... but I do need a starting point for my setup... Then I can take it from their...

The system is installed in a 2005 F150 Supercab with a 250 amp alternator, batcap 800 and comprises of the following....

Pics can be seen here...

http://s251.photobucket.com/albums/gg300/F150Truckin

Eclipse AVN6600 HU feeding a Alto UCS Pro processor,

Eclipse XA2000 at 100W a ch to Cal26 Ti lower "A" pillar mounted in pods,

Eclipse XA4000 bridged at 350W a ch to Profi Plugs in front doors,

Eclipse XA4000 bridged at 350W a ch to Profi Kicks in rear doors,

Alpine MRP-M850 at 800W to a single down fired Profi 12" sub, sealed 1.4 cubes.

On the sub, I have a option of 6DB or 12DB on HU or 24DB on the Alpine.

Other 6 channels are going though the Alto and have the following available..

Butterworth type with 6dB, 12dB, 18dB or 24dB per octave slope

Bessel type with 12dB, 18dB or 24dB per octave slope

Linkwitz-Riley type with 12dB, 24dB or 48dB per octave slope

I'm looking to run the system as a 3way active with the Kicks in the rear doors for added midbass and keep them in the midbass range for the most part..

This is what I came up with and this set up is more me than Don, so if its way off, don't thank Don has lost his mind....

Sub is at 70Hz w/24DB from Alpine M850 Amp xover, I don't no what type of xover they use in there amps.. If someone knows, chime in....

Profi Plugs (front) 70Hz w/24DB Linkwitz to 2.8KHz w/24DB Linkwitz

Profi Kicks (rear) 80Hz w/48DB Linkwitz to 400Hz w/48DB Linkwitz, 48DB will cut them off quick as I am only looking for midbass from them to enhance the plugs, I like midbass...

Cal26Ti (low "A" pillar) 3.3KHz w/24DB Linkwitz

If I'm way off, point me in the right direction Guys...

The only other recommendation I've got from another forum is...

I would start out with something like...

Profi Plugs (front) 70Hz with 12-18db to 3KHz with 12db

Profi Kicks (rear) 80Hz w/48DB Linkwitz to 400Hz w/48DB Linkwitz, 48DB will cut them off quick as I am only looking for midbass from them to enhance the plugs, I like midbass...

Cal26Ti (low "A" pillar) 3ishKhz with about a 12 db slope

Talk to me Guys and Thanks ahead of time for any input on my setup....

Click to read more...

 

[audioholic 5,000+ posts]

Midbass is localizable. It certainly will be well before 400hz.

This is not really a '3-way fully active' setup. That would be tweeter, midrange, and midbass (preferrably all up front). What you are suggesting is a 2-way front stage with added midbass from the rear for strenthening. the problem I see is, running the rear midbass anywhere strong enough to make midbass audibly stronger, will tend to pull your front stage rearward. It wont be rear fill, as presumably you will be running the rear midbass fairly loud. In the end you will have localizable frequencies coming from vastly different points in your vehicle, both wanting to pull your ear's attention in their direction. You can try it, I have my doubts, but you never know till you hear it I guess.

As for setting xover freqs and slopes, thats virtially impossible to do via the internet. All we could do is recommend starting points, actual system tuning needs will depend on many things including the specific car/install, and the owner's personal preferences.

 

[F150Truck'in 10+ year member]

Thanks for the input,

I'm not sure on the rear mids myself, as I just finshed installing the system....

If I have to, I can get kick panel pods and move every thing to the front....

 

[audioholic 5,000+ posts]

Well try it out and see how you like it. If you want, move everything forward later. Im confident it would sound better, but its not always worth the effort to everyone. Either way, good luck with your system.