Help please amp stuff?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=34960
Printed Date: May 14, 2025 at 3:01 PM

Topic: Help please amp stuff?

Posted By: raptor333
Subject: Help please amp stuff?
Date Posted: July 02, 2004 at 11:30 AM

Hi I was wondering if any body could help me in the way of setting my amp levels. I am a true newbie and this stuff gets confusing. Waht I am workingwith is 2 sony xplod xm-2165gtx amps. I am running one sony xplod xs-l121p5 12" sub. 4 ohms on each amp.

I just need help setting the level, filter and low boost.

level:6, 5.5, 4, 2, .5, 0.3v

low boost 0-10 db

filter: 50, 60, 110, 170, 260, 300

i know this is a lot to ask but any help would be appreciated.

Replies:

Posted By: kfr01
Date Posted: July 02, 2004 at 11:52 AM

Depends on your head unit for the level. What head unit do you have?

Keep the low boost at 0.

Filter should be at 60 or 110. Probably 110 as I'm guessing you don't have any dedicated midbass drivers.

-------------
New Project: 2003 Pathfinder

Posted By: raptor333
Date Posted: July 02, 2004 at 11:58 AM

I have an alpine 9127? I know the 27 is correct.

Posted By: kfr01
Date Posted: July 02, 2004 at 12:08 PM

K. It will probably be between 2-4. See this page for a how-to: https://www.bcae1.com/gaincon2.htm

-------------
New Project: 2003 Pathfinder

Posted By: raptor333
Date Posted: July 02, 2004 at 12:14 PM

thank you

Posted By: kfr01
Date Posted: July 02, 2004 at 12:20 PM

np .. crutchfield advisor also has a less technical amplifier setup tutorial somewhere. crutchfieldadvisor.com

-------------
New Project: 2003 Pathfinder

Posted By: stevdart
Date Posted: July 02, 2004 at 4:24 PM

raptor333 wrote:

Waht I am workingwith is 2 sony xplod xm-2165gtx amps. I am running one sony xplod xs-l121p5 12" sub. 4 ohms on each amp.

Is this a dual voice coil sub? And are you planning to wire each coil to a separate amp? Tell me I'm misunderstanding, please.

-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Posted By: kfr01
Date Posted: July 02, 2004 at 5:48 PM

Ack. I didn't see that. A different amp for each voice coil isn't a good idea.

-------------
New Project: 2003 Pathfinder

Posted By: raptor333
Date Posted: July 02, 2004 at 10:28 PM

what would you recommend?

Posted By: kfr01
Date Posted: July 02, 2004 at 10:33 PM

Not more than one amp per subwoofer. If the signals are at all different you'll break your sub.

-------------
New Project: 2003 Pathfinder

Posted By: raptor333
Date Posted: July 02, 2004 at 10:48 PM

can i get different subs for those amps?

Posted By: raptor333
Date Posted: July 02, 2004 at 11:01 PM

or different amps for the subs?

Posted By: kfr01
Date Posted: July 02, 2004 at 11:59 PM

Either would work :-) You could just buy another one of those subs if space isn't an issue.

See this page for wiring guides: https://www.sounddomain.com/shop/wooferwizard.pl

I'm assuming those are mono sony amps. You don't want to run them at less than 2-ohms.

-------------
New Project: 2003 Pathfinder