Feedback from sub/amp. Pop/thump - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Jeep Discussions > Communications and Electronics

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-22-2012, 03:18 PM   #1
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,859
Feedback from sub/amp. Pop/thump

I have done some research lately for this issue and while I think I have a lead on it, I need some help. I have only had one system before, which I knew almost nothing about. I missed having a little bit of bass in my wrangler, so I ordered a small 10 inch shallow mount MTX sub, I believe the terminator. Its 150 RMS and 300 MAX. great. small sub, not alot of room in my jeep, makes sense. I have a Kenwood KAC606 (the 2 channel, 75x2) laying in my basement, its old but I think it still works, and its bridgeable. through a little research its supposed to be at 4 Ohms when bridged, so I got the 4 ohm sub. okay. good so far.

My old wiring kit was for a system pushing around 1000 watts, so it was too big to use most of the parts. I ordered a new wiring kit for like 20 bucks. okay. I did reuse my old RCAs (monster cable) because the new ones I got looked like junk. So I get it all wired up, Build my box. my speaker wires are soldered to the sub, and I think two are connects were soldered because the crimps were garbage that came with the kit. anyways. everything is a good solid connection there. I wired the main ground wire the same place I had my old system wired. However the tub of my wrangler is bedlined, so I may have to scrape some more off of that for a better ground. I also ran the ground from the head unit to the same spot, as per instructions from MTX.

I noticed there was a small ground for the amp itself, I had never seen that before and I didn't have a wire for it, so I didn't bother with it. yeah go figure, I was in a rush. I am going to add that. anyways, the power I tapped into the ACC power, for the on, and went straight to the batter for the amp power. everything is hooked up correctly.

I never sealed my box completely because I wanted to make sure the amp worked properly first. so I wired it all up, and sure enough it plays. sort of. It sounds trashy (small box, not sealed well, etc.) and it makes a strange pulsing feedback noise maybe 1-2 times per second. I kept all my gains low, and messed with gains on both the amp and HU. messed with the low pass and hi pass, tuned the HU to 80 hz, for the lows, turned the amp from L to stereo, etc. turned everything down to try and get rid of feedback. Nothing. It will play the bass, but sounds choppy because it will cut out and thump every second or whatever. and at higher volumes it will completely stop playing, and only thump.

I messed around with all connections some more, made the ground a little better. etc. and nothing. I am going to really get to some good bare metal and ground out that amp next when I get some sunshine. I am also going to swap RCA cables. I am really hoping the amp is faulty. Other than that, my thoughts are that maybe my ground is not connected correctly to the HU, because there is a mess of wiring behind my head unit from the PO. I did my best to find the ground using a voltmeter. but who knows. my electrical knowledge is a bit shaddy, I am not expert.

I would be thankful for any insight or suggestions anyone can give.
Thanks,
Ryan.

__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote
Old 05-22-2012, 09:08 PM   #2
Jeeper
 
BlueRidgeYJ's Avatar
 
Join Date: Mar 2012
Posts: 4,917
I'm not real sure what your complaint is, other than it doesn't work.

Are your subs hitting once or twice, then cutting out, then coming back or are you getting muffled sound?

"It will play the bass, but sounds choppy because it will cut out and thump every second or whatever. and at higher volumes it will completely stop playing, and only thump. "
What do you mean by only thump?

So I understand it:
You are saying that you have primary power straight from the battery, remote wire from the (HU?) ACC, primary ground to the tub (must be on bare metal with continuity to the common chassis ground), HU grounded to the same location, and monster RCA cables?

__________________
“Coming of age in a fascist police state will not be a barrel of fun for anybody, much less for people like me, who are not inclined to suffer Nazis gladly and feel only contempt for the cowardly flag-suckers who would gladly give up their outdated freedom to live for the mess of pottage they have been conned into believing will be freedom from fear.”
BlueRidgeYJ is offline   Quote
Old 05-22-2012, 10:32 PM   #3
Rock-Rubber

WF Supporting Member
 
GoldenSahara00's Avatar
 
Join Date: Aug 2010
Location: SCPA
Posts: 16,859
Quote:
Originally Posted by BlueRidgeYJ
I'm not real sure what your complaint is, other than it doesn't work.

Are your subs hitting once or twice, then cutting out, then coming back or are you getting muffled sound?

"It will play the bass, but sounds choppy because it will cut out and thump every second or whatever. and at higher volumes it will completely stop playing, and only thump. "
What do you mean by only thump?

So I understand it:
You are saying that you have primary power straight from the battery, remote wire from the (HU?) ACC, primary ground to the tub (must be on bare metal with continuity to the common chassis ground), HU grounded to the same location, and monster RCA cables?
Yes on the last part. And no it works. Just clipped alot at low volume. Sorry if my earlier description wasn't very good. I was in a rush. It was clipping. Gain was too high. I still need some clarification on how that works. Too much power for the sub or not enough power from the amp causes clipping? And ways swapped RCA cables was still bad. Messed with ground and the clipping got better but not away. Adjusted gain and got about perfect. Still had a humming noise. Turned out the RCA inputs on the back of the hu were look in the unit. I set up a temp fix. I need a new mount plate and ten to solder or fix the RCA connections or get a new hu. Might work on the ground a little bit but I don't know how much better it can get lol. I also added the amp ground. But yeah it's running perfectly now. It's amazing how you can teach yourself and fix a problem in two days using a few basic searches and some deductive reasoning.

If you have any suggestions for me I would still like to hear them however.
__________________
Ryan - A good eye, a light foot, and a smart rig.
Bolt-ons are boring
AMERICAN JEEPER
My Build - http://www.wranglerforum.com/f118/pr...a00-74622.html
Rausch Creek Trip: 2014 Trip Coming Soon
GoldenSahara00 is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 01:24 AM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC