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Below you'll find my problem addressed to a JL Audio rep. Anythingyou guys can add? Also anyone completely familiar with Alpine headunits? How do I turn The bass and EQ to zero and the crossovers offon my head unit or would I be better off doing so on my amp?

All help GREATLY APPRECIATED!!

Date: Wed, 14 May 2003 17:29:40 -0400
Subject: Re: HELP!!
From: "Hector Yanez" | This is spam | Add to
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To: daygo140@yahoo.com

First I recommend only using one EQ either the one in your head unitor the one in the amp. Both will provide undesirable results. Thesame goes for the crossovers. If you want to use the ones in the ampsthey should be adjusted this way:
Signal sensing: Off
Input Sens.: 12 O'clock
Input voltage switch: Low (the high setting is only used when the ampis connected to outputs of a factory amp)
Mode/Slope: 12 or 24dB. You decide. Which ever sounds better to you.
Filter Freq. (Hz): 80
Bass EQ: On
Q: 1.1
Center Freq.: 45Hz
Boost(dB): +2
Infrasonic Filter: off

The bass and EQ on your radio should be set to zero and thecrossovers should be off.

--
Hector O. Yanez
JL Audio
Area Technical Director
USA Zone 4/Latin America/Caribbean
Phone: (954)443-1100
Fax: (954)443-1108
E-mail: hyanez@jlaudio.com

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From: "Anthony J. Dellarte Jr."
Date: Tue, 13 May 2003 00:58:46 -0700 (PDT)
To: tech4@jlaudio.com
Subject: HELP!!

My system consists of:

head unit: Alpine CDA-7894https://ecominet2.alpine-usa.com/pls/admn/item_info?p_item_name=CDA-7894&p_category=&p_subcategory=&p_main=&p_more=y

amp: JL Audio 500/1https://www.jlaudio.com/amps/5001.html

subs: JL Audio CVS210G-W3v2https://www.jlaudio.com/enclosures/CVS210GW3v2.html

It was installed by an authorized JL Audio dealer into my 2002 F-150SuperCab.

My dilemma is that I am having a tough time tuning the system in. Ifyou answer these questions I have, and anything else you might wantto add, it may help me somewhat. First, my head unit has 4 voltpreouts so my guess is that my amp's input voltage should be switchedto High or should it? It is in the high position currently but myinput sensitivity is pretty much maxed out. I want to get the mostfrom my speakers.

Second, my head unit has the following features (found at the URLabove):

Bass Center Frequency (Selectable) : 60Hz, 70Hz, 80Hz, 90Hz, 100Hz,130Hz, 150Hz, 180Hz
Bass Level Control Range : ±14dB at 60Hz (2dB steps)
Bass Width Adjustment (Q) : 4 Choices (1= Wide, 4=Narrow)
Crossover Type : Independent HP/LP (2-Way) Analog
High Pass Crossover Frequency (Selectable) : Off, 80Hz, 120Hz, 160Hz
Low Pass Crossover Frequency (Selectable) : Off, 80Hz, 120Hz, 160Hz

Now is that going to interfere with the Advanced Bass Control sectionof my amp? To be quite honest with you when adjusting some of thesefeatures on my head unit I don't seem to hear much of a difference insound, why? What am I doing wrong here? I do hear a differencethough when switching the Advance Bass Controls on my amp to on andoff, seems to sound louder and better.

What would be the optimum settings on my head unit and amp?

Help me out here!

All help greatly appreciated!

Tony

tune me in!