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Alpine 7894 and Phoenix Gold XS2300 Setup

SoMnDMAX

By SoMnDMAX
in Audio, Electronics & Software

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SoMnDMAX Enthusiast

SoMnDMAX

Posted
Posted

What is a good starting point for setting up the Alpine 7894 and Phoenix Gold XS2300 amp's high pass and low pass filters? I've got the amp set on the low pass setting, using the 4 volt RCA preouts from the Alpine. I've tried many different settings in t he Alpine, and right now, tight bass sounds good, but if you get into "busy" bass, it sounds like complete crap. Everything just "melts" together and sounds like distortion.

 

Any tips would be much appreciated. I don't know crap about this car audio stuff... ???  :( ???

 

Here's an outline of my system-

 

Alpine 7894 head unit

Phoenix Gold XS2300, bridged in mono for 300 watt output

JL Audio 12" 12w-3 sub

JL Audio Stealthbox

Clarion component door speakers, factory tweeters (I'll upgrade this stuff when $$$ allows)

Factory door speaker wiring

RCA cable connecting sub preout from Alpine to  RCA inputs on amp

 

Thanks!

Matt

oogabooga Enthusiast

oogabooga

Posted
Posted

I'm guessing your PG amp is running the JL Audio sub.  What frequency do you have the filter on the PG amp at?  I would suggest setting it at lowpass anywhere from 60-90 hz.  Just try it inbetween there and see what sounds the best.  I'm not sure if the Alpine's highpass effects the internal amp or not; if it does set it to the samething that you put your amp at.  (ex:  amp set at around 90hz lowpass, and Alpine set at around 90 hz highpass)  If you don't want to use the filter on the amp, and want the music to blend a little more, use the lowpass filter on the Alpine (i think it has a preset for 90hz, not sure though) and turn off the filter on the amp.  For a general rule, subs should play at 60-90hz and below (maybe even up to about 120hz, but nothing higher).

 

I suggest getting an amp for your door speakers, that can make a world of difference in sound quality.

  • 2 weeks later...
jmeredith Enthusiast

jmeredith

Posted
Posted

I had same amp running a sealed JL Audio 10W6 in my Jeep TJ with a poineer headunit.

 

If you're using the lowpass on the amp it's very unlikely the business is coming from your sub.  I would bet money it's coming from your door speakers.

 

The setup I used was either to use the lowpass on the amp or the sub setting on my headunit at 80hz upper limit.  I also had another setting on the headunit to set the filter on the front speakers (5-1/4 kicker impluse coax with a Precision Power amp) at 80hz or 120hz depending on the volume level and type of music.

 

For example, hip hop or rap, very loud, had the sub at 80 and below and the fronts at 80 and above.  Sounded super tight and very clear (not a whole lot of midrange in hip hop).  Change music to rock with lots of guitar (lots of midrange) and at the high volume level the fronts would start to sound like crap.  Change the front filter to 120 and above and back to good sound again (sacraficing midrange for volume).

 

At lower volume I always ran 80 80.

 

If your headunit doesn't support this you need an amp with a highpass filter for your fronts...

 

Hope that helps.  I know it took a lot of fiddling with mine to make it right.

-jm

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