subwoofer/battery question - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Tech Forums > 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 08-27-2006, 02:25 PM   #1
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
subwoofer/battery question

alright i am getting a 10" mtx audio subwoofer with an 800 watt amp put in the jeep behind the back seat...i've heard that a tj's shouldn't be used for jump starting other cars...does this mean that the battery is weak? is the battery strong enough to hold up to this setup? will my battery die?

mrbigjeep is offline   Quote Quick Reply
Old 08-27-2006, 02:28 PM   #2
Jeeper
 
amerijeep's Avatar
 
Join Date: Apr 2005
Location: Mississippi.
Posts: 3,951
It depends on how many amps the power amplifier will pull. Check the amp to see what the draw is.


The reason you can't jump start is due to this could cause voltage spikes and damage the cpu.

__________________
To all who serve, Thank You.
amerijeep is offline   Quote Quick Reply
Old 08-27-2006, 02:29 PM   #3
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
how do i check the amp to see what the draw is?? ya i heard something about voltage spikes when that was said but im not sure what that is
mrbigjeep is offline   Quote Quick Reply
Old 08-27-2006, 02:32 PM   #4
Jeeper
 
amerijeep's Avatar
 
Join Date: Apr 2005
Location: Mississippi.
Posts: 3,951
You could just check the box the amplifier came in or check on the amplifier itself
__________________
To all who serve, Thank You.
amerijeep is offline   Quote Quick Reply
Old 08-27-2006, 02:34 PM   #5
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
alright i'll check and let ya know...
mrbigjeep is offline   Quote Quick Reply
Old 08-27-2006, 04:06 PM   #6
Jeeper
 
Texapple's Avatar
 
Join Date: Nov 2005
Location: New Jersey
Posts: 2,617
urban legend?
old wives tale?
maybe I was just lucky......I put it to the test last weekend.
Frank left the back open (interior lights on) on the Tahoe and drained the battery, used my Jeep for a jump start, no problems......yet?
__________________
got rid of the husband.....bought another Jeep

my new spotter
Texapple is offline   Quote Quick Reply
Old 08-27-2006, 06:01 PM   #7
Jeeper
 
amerijeep's Avatar
 
Join Date: Apr 2005
Location: Mississippi.
Posts: 3,951
Well, I think if you look in the owners manual, it will tell you no jumping.
__________________
To all who serve, Thank You.
amerijeep is offline   Quote Quick Reply
Old 08-27-2006, 06:04 PM   #8
Jeeper
 
97REDTJ's Avatar
 
Join Date: Jun 2006
Location: Cleburne
Posts: 105
Send a message via AIM to 97REDTJ Send a message via Yahoo to 97REDTJ
Hey BigJeep i am rumming 2 12" 1200 watt sony exploids in a box behind the rear just like you are plus a 1200 watt sony amp and i dont have any problem with the battery. I have had my sub/amp set up for almost a year now and i have'nt had any problems with the battery at all so far.
__________________
Hey you with all the bling bling and 22's HUMM this...O|||||||O Its A JEEP Thing!

www.jeepoutfitter.com
97REDTJ is offline   Quote Quick Reply
Old 08-27-2006, 07:18 PM   #9
Jeeper
 
Texapple's Avatar
 
Join Date: Nov 2005
Location: New Jersey
Posts: 2,617
Quote:
Originally Posted by amerijeep
Well, I think if you look in the owners manual, it will tell you no jumping.
so, I shouldn't play with fire or press my luck, huh?

__________________
got rid of the husband.....bought another Jeep

my new spotter
Texapple is offline   Quote Quick Reply
Old 08-27-2006, 09:43 PM   #10
Jeeper
 
amerijeep's Avatar
 
Join Date: Apr 2005
Location: Mississippi.
Posts: 3,951
Quote:
Originally Posted by firstaidTJ
so, I shouldn't play with fire or press my luck, huh?


I really don't know. I've always been told that by the jeep dealer, but I haven't ever tried to verify it.
__________________
To all who serve, Thank You.
amerijeep is offline   Quote Quick Reply
Old 08-27-2006, 10:26 PM   #11
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
Quote:
Originally Posted by 97REDTJ
Hey BigJeep i am rumming 2 12" 1200 watt sony exploids in a box behind the rear just like you are plus a 1200 watt sony amp and i dont have any problem with the battery. I have had my sub/amp set up for almost a year now and i have'nt had any problems with the battery at all so far.
alright thanks a lot...then i should be fine...thanks for the help
mrbigjeep is offline   Quote Quick Reply
Old 08-28-2006, 07:23 AM   #12
Jeeper
 
stainless's Avatar
 
Join Date: Aug 2006
Location: Newnan, GA
Posts: 237
That also applies to roll starting the Jeep too. I've done it to TJ's before with no negative effects, but I've seen what it can do to a motorcycle.
I had an '04 Triumph Daytona 600.
The shop let my bike battery die, so instead of putting it on charge, they just roll started it and let it run. It fried the ECU. Everything on the bike was digital too, so nothing worked.
They ended up having to replace the ECU ($2000)
__________________
"If you don't have parts left over, you did something wrong."

"Owning a JEEP makes heroin addiction look like a vague wish for something salty."

"A liberal is someone who feels a great debt to his fellow man ....which debt he proposes to pay off with your money."
stainless is offline   Quote Quick Reply
Old 08-29-2006, 12:31 AM   #13
Jeeper
 
hardy1531's Avatar
 
Join Date: Dec 2005
Location: Tennessee
Posts: 541
amerijeep I am NOT calling you a liar but i used my Jeep the other day to jump start a friend in a Ford. nothing messed up so far.

BigJeep. you will have no problems running a "800" watt amp to push 1 10''. are you using a downward firing box?
hardy1531 is offline   Quote Quick Reply
Old 08-29-2006, 07:42 AM   #14
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
Quote:
Originally Posted by hardy1531
amerijeep I am NOT calling you a liar but i used my Jeep the other day to jump start a friend in a Ford. nothing messed up so far.

BigJeep. you will have no problems running a "800" watt amp to push 1 10''. are you using a downward firing box?
no amerijeep isn't a liar...jeep really does say that it isn't good to use it to jumpstart...it might not effect everyones jeep but some people have had problems after jumpstarts...some posted threads around here because they had problems after the jumpstart

hardy, alright thanks...but no it fires towards the seat

i got it installed with no problems
mrbigjeep is offline   Quote Quick Reply
Old 08-29-2006, 04:30 PM   #15
Jeeper
 
hardy1531's Avatar
 
Join Date: Dec 2005
Location: Tennessee
Posts: 541
alright cool. I would like to see some pics
hardy1531 is offline   Quote Quick Reply
Old 08-29-2006, 06:22 PM   #16
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
alright i'll try to get some of the sub and amp in a little while and post em
mrbigjeep is offline   Quote Quick Reply
Old 08-29-2006, 07:45 PM   #17
Jeeper
 
amerijeep's Avatar
 
Join Date: Apr 2005
Location: Mississippi.
Posts: 3,951
I don't know what the answer to the "jumping" debate is. I know about electronics and know that damage can sometimes happen over time, right away and takes awhile for any symptoms to show, or maybe never.

I'd like to find out where DM/ Jeep really stands on this. I think I would probably avoid jumping if I could, but I would never leave anyone stranded. I'd rather chance it than leave someone stuck.
__________________
To all who serve, Thank You.
amerijeep is offline   Quote Quick Reply
Old 08-29-2006, 08:13 PM   #18
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
pics

heres 2 pics...one from the back (first) and another from inside showing the front with the seat folded...and as you can see im terrible with pictures and downsizing...(there is a huge white area cause i don't know how to downsize it right but i did the best i could, sorry)

Click image for larger version

Name:	sub and amp downsize.JPG
Views:	89
Size:	96.8 KB
ID:	567

Click image for larger version

Name:	back view sub and amp downsize.JPG
Views:	82
Size:	96.7 KB
ID:	568
mrbigjeep is offline   Quote Quick Reply
Old 08-29-2006, 09:06 PM   #19
Gets stuck on escalators
 
Join Date: Dec 2005
Location: Springfield, NJ
Posts: 74
OK.... my 2 cents on the jump starting debate. I work for a small robotics company and my job is designing industrial computer control systems. Yes it is true that inductive kickback from motors, coils, and solenoids, can blow holes in the silicon wafers of ICs, although there are ways to protect against this and I sure hope that Chrysler would incorporate such protection in there computers. Now that I’ve said that, I’m going to add that our Jeep computers must be protected well enough to run our own starters. How different is it running a starter in another jeep through 12’ wire? 12’ of wire will lower the voltage to the starter which would also lower the kickback. Next thing, your battery is a giant capacitor (in theory) which will absorb quick voltage spikes. Ok… personal experience… I run an Oasis HP 1000 air compressor on my Jeep. At max load it pulls about 180 amps (Rated, I never measured). I have it mounted in the back of my Jeep and have run about 8’-9’ feet of #4 wire to the battery. I have run this setup for the past 6 – 8 months with no problem. I use this compressor for air tools, filling tires, blowing out filters, you name it, and I have not had a problem. Also winch motors are equivalent to starter motors, and I see a lot of Jeeps with winches. Now for the flip side…. I could see possible damage if you had a bad connection to the battery, or maybe a very weak battery. Maybe this is what Chrysler is trying to protect us from.

OK… 2 more cents. I think it’s perfectly OK to jump start another vehicle with your jeep but if you’re not sure or your battery or battery connections are questionable. Put the jumper cables on the other vehicle and let your jeep run for 15 – 20 minutes to charge the other vehicles battery then disconnect the cables and start the other vehicle off of it’s own battery.

Frank
Fapple is offline   Quote Quick Reply
Old 08-29-2006, 09:09 PM   #20
Jeeper
 
Texapple's Avatar
 
Join Date: Nov 2005
Location: New Jersey
Posts: 2,617
good grief - we don't hear from you in months and then you write that long post
__________________
got rid of the husband.....bought another Jeep

my new spotter
Texapple is offline   Quote Quick Reply
Old 08-29-2006, 09:26 PM   #21
Jeeper
 
amerijeep's Avatar
 
Join Date: Apr 2005
Location: Mississippi.
Posts: 3,951
Good point, Frank. You convinced me.


Kat, I had a smartie comment for you here, but since you are my friend, I just can't bring myself to say anything. Love ya!!
__________________
To all who serve, Thank You.
amerijeep is offline   Quote Quick Reply
Old 08-29-2006, 09:29 PM   #22
Jeeper
 
Texapple's Avatar
 
Join Date: Nov 2005
Location: New Jersey
Posts: 2,617
I can take a joke......I'm not that fragile

but you better be smiling when you say it
__________________
got rid of the husband.....bought another Jeep

my new spotter
Texapple is offline   Quote Quick Reply
Old 08-30-2006, 05:05 PM   #23
Jack Lives Here!!!

WF Supporting Member
 
1BLKJP's Avatar
 
Join Date: Apr 2005
Location: Phoenix, AZ
Posts: 7,764
I gotta say that I have had mine jumped and jumped other people many time off of my jeep and never ever (knock on wood) had a problem. My Optima and my jeep are always up to the task (Except that time on Willow Springs trail at 2 am when I played the radio and had the lights on for an hour straight and killed it).

Oh wait, I'm not running the red top anymore. Thanks to my good friend Hackles fusable link frying on him while on Axle Alley I switched batteries so I could charge his back up for him. I have a nice little Yellow Top sitting in my junk right now. What a good friend "I" Am. LOL LOL LOL LOL

And darnit Kat you leave that Mechanic/Husband of yours alone. If he has 2 minutes to hide from you and play on the web then you just let him.
__________________
Thanks,
Jack Hickman

President - Arizona Off-Highway Vehicle Coalition
Vice-President - ASA4WDC
Arizona Rock Rats
1BLKJP is offline   Quote Quick Reply
Old 09-08-2006, 11:20 PM   #24
Jeeper
 
upinar's Avatar
 
Join Date: Sep 2006
Location: miami, Florida
Posts: 489
youll be fine, im pussing 900 watts to my sound bar and my battery does just fine. ur in the clear
upinar is offline   Quote Quick Reply
Old 09-08-2006, 11:22 PM   #25
Jeeper
 
amerijeep's Avatar
 
Join Date: Apr 2005
Location: Mississippi.
Posts: 3,951
Quote:
Originally Posted by upinar
im pussing 900 watts

Is that what you call it?...
__________________
To all who serve, Thank You.
amerijeep is offline   Quote Quick Reply
Old 09-09-2006, 06:56 AM   #26
Jeeper
 
mrbigjeep's Avatar
 
Join Date: Apr 2006
Posts: 4,288
lol
mrbigjeep is offline   Quote Quick Reply
Old 09-09-2006, 08:42 PM   #27
coilovers are damn flexy
 
bluvikng's Avatar
 
Join Date: Mar 2006
Location: Texas
Posts: 3,260
Quote:
Originally Posted by upinar
youll be fine, im pussing 900 watts to my sound bar and my battery does just fine. ur in the clear
Damn it boy, you need to read your posts, before you enter them..........lol

I have read my Owners Manuel, and have not seen anything about staying away from jump starting other vehicles. It only gives you the correct way to hook it up. Have not had any problems with it yet. I would think that a winch would cause a greater spike than jump starting someone anyway. I for one, think it is total bunk. Now if you do not take care in hooking up your jumper cables, anything is possible.

On another note, Internet Explorer has a small program everyone can down load, called "Spell Check". Sure makes the reading of post's, more civilized.
bluvikng is offline   Quote Quick Reply
Old 09-11-2006, 03:54 PM   #28
Jeeper
 
04moneypit's Avatar
 
Join Date: Jan 2006
Location: Under the hood of the jeep from hell (not mine)
Posts: 529
All right, one more to add to the pile. I've had no problems jump starting several times, and a winch is a significant and long duration spike (typically), just like a compressor etc... Anyway it is probably just DC just protecting themselves from a lawsuit when some crazy s**t happens and someone blows their computer.
__________________
If there's a will, usually there's a way, but then you get to that bolt that you still can't get to with two extensions, two universal sockets, and a contorsionist midget trying to help you.

1999 XJ Four door, mostly stock for now, but I am in the process of building a custom plate bumper.
04moneypit is offline   Quote Quick Reply
Old 06-12-2007, 06:26 PM   #29
Jeeper
 
Join Date: Nov 2006
Location: Chicago, IL
Posts: 8,286
Send a message via AIM to Triple88a Send a message via MSN to Triple88a Send a message via Yahoo to Triple88a Send a message via Skype™ to Triple88a
Sorry to hijack

Where do you guys run the battery to amp wire through the firewall? I cant find a hole in the passenger side (by the battery) to run it to the amp. I've looked all over the firewall but didn't see anything. Do you guys just make a hole? Where exactly? pics?
Triple88a is offline   Quote Quick Reply
Old 06-12-2007, 07:10 PM   #30
Jeeper
 
JCS05Rubi's Avatar
 
Join Date: Mar 2007
Location: central md
Posts: 2,748
Just an FYI about the jump starting.

I have jump started 4 different vehicles with my Jeep. One was a 73 Nova, that had a 20 year old battery that wouldnt hold a charge for POO. Took 20 minutes charging, 3500 rpms, plus some starting fluid to get it running.... No problems, and that was months ago. Fapples post about batterys absorbing spikes etc. is correct, along with preventive measures in the ECU (voltage regulators etc.).

With that said, NO CAR WITH EFI SHOULD EVER BE JUMP STARTED, OR USED FOR JUMP STARTING. These computers, sensors, and electronic equipment in general, are VERY fragile when it comes to electricity, and you dont have any idea what condition the components are in. Even a brand new 2007 can have a bad regulator somewhere that hasn't caused an issue yet, and you jump a car and BOOM. A miniscule voltage spike blows out a $2500 ECU.

Jump boxes are the new GO-TO toy. You can get them under 50 bucks (rechargable). Some even have flashlights in them!!

Now, I still carry cables in my Jeep, mainly because I want my air compressor more than a jump box, but the Box is on my list. Just be careful. Chances are, as long as you dont rev out your Jeep, and crank over the other car while your connected you will be fine.

__________________
Dad's Blog! http://justkeepliving.blog.com/
T-Shirts for Dad, based on his "Just Keep Living" philosophy. http://www.cafepress.com/justkeepliving


1997 Wrangler Sport - 5 spd. Retired
2005 Wrangler Rubicon - 6spd|KC 55watt fogs, IPF H4s with fatboys,Uniden CB radio/Teraflex mount
http://www.4x4s-pod.com/
JCS05Rubi is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
shock and speedometer question trmn8r TJ Tech Forum 0 12-19-2008 01:58 PM
quick axle question Sb5551 TJ Tech Forum 3 10-03-2008 08:38 PM
Trans Mount Question MOz TJ Tech Forum 8 06-10-2008 03:14 PM
Tire question jeepnewbie YJ Tech Forum 9 05-03-2008 11:28 AM
Carb question and EGR question trulefty YJ Tech Forum 0 12-12-2006 04:55 PM


logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:19 PM.



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