Aftermarket HU: Resistor for sub "pop" - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Focus Fanatics > Ford Focus Tech Discussions > Car Audio, SYNC, MyFord Touch & Electronics

Car Audio, SYNC, MyFord Touch & Electronics The Forum for the Ford Focus audiophiles. The place to chat about automobile sound systems, security systems, or show off your I.C.E.!
Sponsored By: GT Sound Control


Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 07-28-2010, 11:18 AM   #1
FinalJenemba
Focus Jr. Enthusiast
 
Join Date: Mar 2008
Fan#: 54270
Location: Tampa, FL, FL
What I Drive: 2005 Silver ST

Posts: 27
FF Reputation: 1 FinalJenemba Good Standing Member
Buy-Sell-Trade Rating: (1)
Aftermarket HU: Resistor for sub "pop"

Just installed a new Pioneer HU in my 05 /w Audiophile. I did my research and got all the right harnesses so everything works great, I love it. But im getting the popping sound from the sub whenever I turn on the stereo. I read on here that a 1k ohm resistor in the amp turn on lead will fix this, but my question is, is it a 1/8 watt, 1/4 watt, or 1/2 watt resistor? Or does it matter?

Thanks!


FinalJenemba is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 07-28-2010, 12:41 PM   #2
2GreenAutos
Focus Enthusiast
 
2GreenAutos's Avatar
 
Join Date: Mar 2008
Fan#: 54691
Location: OKC, OK
What I Drive: 2010 SES

Posts: 148
FF Reputation: 2 2GreenAutos Good Standing Member
Buy-Sell-Trade Rating: (13)
Is Audiophile a factory amp/sub system? In any case I have used the PAC TR-4 turn on delay module with great results. It will delay the amp turn on 2 seconds and should get rid of that pop, ebay and sonicelectronix has them less than $20. Could you post up where you read about the resistor? I have only heard of diode isolating head units.
2GreenAutos is offline  
    Reply With Quote
Old 07-28-2010, 01:52 PM   #3
FinalJenemba
Focus Jr. Enthusiast
 
Join Date: Mar 2008
Fan#: 54270
Location: Tampa, FL, FL
What I Drive: 2005 Silver ST

Posts: 27
FF Reputation: 1 FinalJenemba Good Standing Member
Buy-Sell-Trade Rating: (1)
Quote:
Originally Posted by 2GreenAutos View Post
Is Audiophile a factory amp/sub system? In any case I have used the PAC TR-4 turn on delay module with great results. It will delay the amp turn on 2 seconds and should get rid of that pop, ebay and sonicelectronix has them less than $20. Could you post up where you read about the resistor? I have only heard of diode isolating head units.
Post #2 http://www.focusfanatics.com/forum/s...light=resistor

Post #5 http://www.focusfanatics.com/forum/s...light=resistor

Post #4 http://www.focusfanatics.com/forum/s...light=resistor

I work at Radioshack and can grab a 1k resistor real easy, would much prefer that to ordering a $20 part of ebay if I could.
FinalJenemba is offline  
    Reply With Quote
Old 07-28-2010, 02:37 PM   #4
2GreenAutos
Focus Enthusiast
 
2GreenAutos's Avatar
 
Join Date: Mar 2008
Fan#: 54691
Location: OKC, OK
What I Drive: 2010 SES

Posts: 148
FF Reputation: 2 2GreenAutos Good Standing Member
Buy-Sell-Trade Rating: (13)
I see, I knew it was something about the factory stereo. Those things always need something wierd. Didn't know you needed to step down the voltage to the amp.

I am not an electrical engineer so you may want to wait for someone else to chime in. The way I understand it, the watt rating is the amout of heat the resistor can dissipate. The higher watt rating won't effect the resistance and just adds safety. http://www.bcae1.com/resistrs.htm Their calculator says 1000ohm @ 12v = .144 watts, so as long as you don't use the 1/8th it should be good.
2GreenAutos is offline  
    Reply With Quote
Old 07-28-2010, 03:05 PM   #5
YellowJellyBean
Love CA / Hate CARB
 
YellowJellyBean's Avatar
 
Join Date: Sep 2009
Fan#: 69030
Location: Santa Clara, CA
What I Drive: MÜSTÄRD

Posts: 2,160
FF Reputation: 13 YellowJellyBean Great Standing Member
Buy-Sell-Trade Rating: (5)
Yes, get a 1k ohm resistor that can handle a whole .144 watts of power without failing, and you'll be fine.
__________________
"My yellow, in this case, is not so mellow" -Jimi Hendrix

Focus Fanatics
Extremely helpful people
I made a haiku
YellowJellyBean is offline  
    Reply With Quote
Old 07-28-2010, 03:55 PM   #6
FinalJenemba
Focus Jr. Enthusiast
 
Join Date: Mar 2008
Fan#: 54270
Location: Tampa, FL, FL
What I Drive: 2005 Silver ST

Posts: 27
FF Reputation: 1 FinalJenemba Good Standing Member
Buy-Sell-Trade Rating: (1)
Quote:
Originally Posted by 2GreenAutos View Post
I see, I knew it was something about the factory stereo. Those things always need something wierd. Didn't know you needed to step down the voltage to the amp.

I am not an electrical engineer so you may want to wait for someone else to chime in. The way I understand it, the watt rating is the amout of heat the resistor can dissipate. The higher watt rating won't effect the resistance and just adds safety. http://www.bcae1.com/resistrs.htm Their calculator says 1000ohm @ 12v = .144 watts, so as long as you don't use the 1/8th it should be good.
Quote:
Originally Posted by YellowJellyBean View Post
Yes, get a 1k ohm resistor that can handle a whole .144 watts of power without failing, and you'll be fine.
I see, tanks guys! That makes a bunch of sense. You'd think after 2 years of working at Radioshack id have picked that up somewhere lol. But the truth is the few people that still come in to buy fuses and junk are pretty unpleasant and dont much care to talk.

Thanks again!
FinalJenemba is offline  
    Reply With Quote
Old 07-29-2010, 10:08 AM   #7
kkreit01
Focus Enthusiast
 
Join Date: Jun 2010
Fan#: 76322
Location: Olathe, KS
What I Drive: 2010 Sterling Grey SES Sedan

Posts: 85
FF Reputation: 1 kkreit01 Good Standing Member
Buy-Sell-Trade Rating: (0)
You might want to read some more (on other forums, Mustang, etc.). I used the same harness with my 08 Sport Trac audiophile. I still had turn-on/off thump even with a 1K resistor. It wasn't horrible, and I could regulate it by turning the volume way down prior to stopping vehicle. Others recommended a different size resistor (I can't remember exactly). A voltage regulator would work better. This is just an FYI, that a 1K will help, but probably not eliminate the problem.

I quickly went all aftermarket, and sold the audiophile, so I didn't look into the problem any further, when I had my ST.
kkreit01 is offline  
    Reply With Quote
Old 07-29-2010, 10:54 AM   #8
YellowJellyBean
Love CA / Hate CARB
 
YellowJellyBean's Avatar
 
Join Date: Sep 2009
Fan#: 69030
Location: Santa Clara, CA
What I Drive: MÜSTÄRD

Posts: 2,160
FF Reputation: 13 YellowJellyBean Great Standing Member
Buy-Sell-Trade Rating: (5)
Quote:
Originally Posted by kkreit01 View Post

I quickly went all aftermarket, and sold the audiophile, so I didn't look into the problem any further, when I had my ST.
Which is what I would recommend. I understand it's expensive, but you'll be much happier in the long run if you just replace the Audiophile setup.
__________________
"My yellow, in this case, is not so mellow" -Jimi Hendrix

Focus Fanatics
Extremely helpful people
I made a haiku
YellowJellyBean is offline  
    Reply With Quote
Old 07-29-2010, 04:45 PM   #9
quinnjdogg
Focus Jr. Enthusiast
 
Join Date: Jun 2010
Fan#: 76001
Location: rineyville, KY
What I Drive: 2003 black svt

Posts: 43
FF Reputation: 3 quinnjdogg Good Standing Member
Buy-Sell-Trade Rating: (0)
I have always used a 1.5K resistor. You could also use a radio shack part # 276-1770. It is a 5 volt regulator that works perfectly, just a little tougher to install.
quinnjdogg is offline  
    Reply With Quote
Old 07-29-2010, 11:27 PM   #10
FinalJenemba
Focus Jr. Enthusiast
 
Join Date: Mar 2008
Fan#: 54270
Location: Tampa, FL, FL
What I Drive: 2005 Silver ST

Posts: 27
FF Reputation: 1 FinalJenemba Good Standing Member
Buy-Sell-Trade Rating: (1)
Quote:
Originally Posted by kkreit01 View Post
I quickly went all aftermarket, and sold the audiophile, so I didn't look into the problem any further, when I had my ST.
Quote:
Originally Posted by YellowJellyBean View Post
Which is what I would recommend. I understand it's expensive, but you'll be much happier in the long run if you just replace the Audiophile setup.
Def not doin that. Iv never been dissatisfied with the way the Audiophile sounded, just wanted iPod control and BT. Im very happy with the way the system sounds. Im gonna try the resistor this weekend, if it doesn't work ill grab a volt reg and do it that way.

quinnjdogg: Could you give a quick description on how you wired your 5v reg up? Would help people finding this through google as well as me ;)

Edit: Just got to work and checked out the 5v reg, it really doesnt look any harder to hook up, just in, out, and tap into the ground wire. I think ill just go that route so I can get it right the first time. Thanks!

Last edited by FinalJenemba; 07-30-2010 at 02:35 PM.
FinalJenemba is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 08:21 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.