the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

sub pop after shut off


Post ReplyPost New Topic
< Prev Topic Next Topic >
boug0752 
Copper - Posts: 73
Copper spacespace
Joined: March 09, 2006
Location: United States
Posted: March 29, 2007 at 3:04 PM / IP Logged  

Hello everyone,

I'm in need of some assistance. I just installed a new head-unit (Kenwood KDC-X891) using the proper method of solder and heat shrink so I know its all good there. The problem is when I shut my vehicle off, my sub always makes a pop. Just a single pop every time. Just wonder what this is and how I can prevent and stop it. I'm assuming its a ground issue but I just have no idea where to start.

Any assistance is appreciated. I do realize this has most likely been talked about before but I could not find the answer through the search.

Thank you,

Jon

If your counting pennies and dimes then maybe you shouldn't be spending every penny and dime you have!!
supradude 
Silver - Posts: 915
Silver spacespace
Joined: September 21, 2004
Location: South Carolina, United States
Posted: March 29, 2007 at 7:18 PM / IP Logged  
Look at this site, www.autosound2000.com. You might need a turn-off thump eliminator. Check your grounds good first.
'85 Toy
boug0752 
Copper - Posts: 73
Copper spacespace
Joined: March 09, 2006
Location: United States
Posted: March 29, 2007 at 9:36 PM / IP Logged  

Thanks for the link. I did check my grounds today and they are all good. Just wondering if anyone has used this product in the past and can give it some positive feedback.

Thanks,

Jon

If your counting pennies and dimes then maybe you shouldn't be spending every penny and dime you have!!
stevdart 
Platinum - Posts: 5,816
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: January 24, 2004
Location: Pennsylvania, United States
Posted: March 30, 2007 at 4:41 PM / IP Logged  

You want your head unit to delay turning off until the sub amp is off, or the sub amp gain is set too high.  Reprinted here is a response geepherder wrote on this forum to this question.  I saved it to file for reference.

If your gain controls are set too high, this can happen.  This would be the first thing to check.

If that checks out, then many times all it takes is a slight delay to power down the amp before the radio.  What you can do is cut your radio's accessory lead, and install a diode inline (put the stripe side toward the radio).  Now, install an electrolytic capacitor (220-1000 microfarad) on this line after the diode (on the radio side).  The bigger the value, the longer the delay.  Make sure to observe polarity on the cap (it'll pop if you get it backwards)- there'll probably be an arrow with a "minus" sign in it identifying the negative terminal.  Connect negative terminal to ground, and positive to the accessory lead.

Now, when you cut off the ignition, the diode will keep voltage from leaking back into the accessory circuit where the amp is tied on, and the capacitor will discharge into the radio, keeping it on until after the amp shuts off.

geepherder

The Navone product N-66, first on that linked page, will do this.  Or go to Rat Shack for the parts for a DIY build.

http://www.radioshack.com/product/index.jsp?productid=2103627&cp=2032058&f=Taxonomy%2FRSK%2F2032058&categoryId=2032058&kwCatid=2032058&kw=capacitor&parentPage=search

http://www.radioshack.com/product/index.jsp?productid=2062577&cp=&sr=1&origkw=diode&kw=diode&parentPage=search

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

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Thursday, October 31, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer