I am hooking up a Rockford Fosgate P4004 to my Alpine Type R (6.5" components for front) and (5x7 coax) for rear doors. The components already have crossovers and the 5x7 have crossover build in right? So should I run AP or HP?

Also, what is a good starting point for my gain and freq. adjustments for front and rear? This is my first amp install so I don't feel like learning the hard way.

Thanks....pictures of new setup to come soon

 

First things first. The amp isnt going to put out enough power to those Alpines (if they are the 2007 model) they are power hungry!!!

But you need to set your amp to HP.

n00b way: (MOST should do it this way)
0) Get a CD you really know and have it be very bass and highs heavy. ONE OF THE HARDEST SONGS/DISCS YOU WILL LISTEN TO

1) Start with the gains all the way down.
2) Set xover around 65 (for 6.5) and 75 for the (5x7).
3) Turn the radio up to abt 3/4 volume.

4) Slowly add in the front speakers until speakers just start to clip then back off about 1/8 turn.
4a) If mids start to distort then turn xover up until that is gone.

5) Add in back spks until you just start to notice the rear fill.
5a) If mids start to distort then turn xover up until that is gone.
6) Enjoy and tweek with other songs.

Pro way: (Much more in depth. PROS ONLY)
0) Get a CD with a 1kHz 0db sine sweep.
0) Get a radioshack amplified speaker
0) Get a RCA to mini with male and female ends.
0) Make a 10:1 step down.

1) Turn off all equalizers on radio. bass, EQ settings... etc.
2) Make sure everything is unplugged from radio.
3) Plug radioshack spk into back of HU.
4) Turn up until HU clips. Remember that level and KEEP IT THERE.
5) Go to next device (amps or EQ's ...etc. )
5a) going to use a EQ here.

6) Plug the Speaker into the output of the EQ.
7) Adjust gains to just before it clips.

8) Go to your amps
9) Install your 10:1 in between the amp and the Speakers.
10) Adjust gains until it clips then back down.

11) System is set.

P.S. With subs use a 40 Hz track. With tweeters use a 4kHz track.

 

well, I'm already learning the hard way because I already bought the amp. Luckly I got a great deal on ebay ($80). Question, I know that low pass would be for a sub but why would I want to use High Pass vs. All pass when I am already running a crossover at the speaker?

 

The xover isnt going to filter out the low bass. Only seperate the sounds for the mid and tweet.

HP if no digital EQ
AP if running Dig EQ.

 

my JVC HD HU has an adjustable EQ....is that what you mean or are you talkin about a separate EQ?

 

Separate. Like my RF 3Sixty.2. Its another setup.

 

Thanks a lot for the help

 

Not a problem.

And hopefully this will help everyone else out too.