Welcome to the North American Subaru Impreza Owners Club Saturday September 20, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC General > Car Audio, Video & Security

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-09-2009, 06:48 PM   #1
ryanjg11
Scooby Newbie
 
Member#: 214071
Join Date: Jun 2009
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2007 Subaru WRX STI
Black

Default Upgrading sound system: Use stock speaker wiring or not?

I'm going back and forth on whether I want to use the stock speaker wiring or not... Here's what I'm installing: New head unit (Alpine iDA-X305), new 5-channel amplifier (Alpine PDX-5; 4x75 watts to the speakers and 1x300 to the subwoofer), Focal components in the front doors, and CDT coaxials in the rear doors.

I would like to mount the crossovers for the Focals underneath the passenger seat with the amp, rather than inside the doors. But, I might be willing to put them in the doors if it will make the install considerably easier.

I purchased 12awg speaker wire specifically for this install, but am wondering if I can just pick up the stock speaker wire from the harness, and run that down to my amp.

The issue here is that the front stock component speakers have the tweeters wired in parallel (if I understand correctly), so only one wire going into each door. That means, basically, that I will have to mount the crossovers inside the doors if I want to use the factory wiring, correct?

Also, wondering on opinions of the quality of the factory wire. Would it be okay sending the Alpine 75 watt signal through each of these lines? Would I notice a difference with the 12awg stuff (I'm guessing factory speaker wire is 16awg or higher).

Thanks,

Ryan
* Registered users of the site do not see these ads.
ryanjg11 is offline   Reply With Quote
Old 08-09-2009, 07:09 PM   #2
ptirmal
Scooby Specialist
 
Member#: 82243
Join Date: Mar 2005
Chapter/Region: Tri-State
Location: Philly
Vehicle:
07' Acura TL-S
11' Ducati Monster 796

Default

http://www.bcae1.com/ has a great section on wire and the audio loss depending on the factory gauge and length. I can't remember if the factory wire is 18ga or 22ga (most likely the former), it should be able to handle 75w at 18ga without any audible loss, at 22ga there is a benefit going to higher gauge. It's definitely not 16ga, that would make it a lot easier.

If you want to keep it simple and use the factory wire then you'll need the crossovers in the doors. If you want them under the seat you'll need to run new wire if you plan on putting the tweeters in the doors.

If you plan on putting the tweeters in the a-pillars or somewhere besides the doors you can keep the crossovers under the seat, run wire to the tweeters from the crossover and use the factory wire to get to the woofer in the doors.
ptirmal is online now   Reply With Quote
Old 08-09-2009, 07:46 PM   #3
Aaron'z 2.5RS
Scooby Guru
 
Member#: 1026
Join Date: Mar 2000
Chapter/Region: MWSOC
Location: Hickigan
Vehicle:
'00 RS/WRX Stg5
'98 RS Stock

Default

The install will be FAR easier, if you use the factory wire (more than adequate for the distance you want to run) Putting the crossover under the door panel..

Otherwise, as stated about, it's a bit more work..
Aaron'z 2.5RS is offline   Reply With Quote
Old 08-09-2009, 08:48 PM   #4
ryanjg11
Scooby Newbie
 
Member#: 214071
Join Date: Jun 2009
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2007 Subaru WRX STI
Black

Default

Gotcha. I'm really leaning toward a cleaner install of putting the x-overs under the seat, in a custom bracket with the amp, versus velcro'ing them in the doors.

It will be a pain to run the wire through the jams, though. Any tips for how to do this? Coathanger?
ryanjg11 is offline   Reply With Quote
Old 08-09-2009, 09:27 PM   #5
bpang1
Scooby Specialist
 
Member#: 67225
Join Date: Jul 2004
Chapter/Region: NWIC
Location: Spokane, WA
Vehicle:
2004 WRX Wagon
JBP

Default

Save yourself some time and money...put the crossovers in the doors. Doesn't hurt anything as far as my ears can tell. Then again I'm no audiophile like some of the awesome guys that post here.
bpang1 is offline   Reply With Quote
Old 08-09-2009, 09:29 PM   #6
ryanjg11
Scooby Newbie
 
Member#: 214071
Join Date: Jun 2009
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2007 Subaru WRX STI
Black

Default

It's more about it just being cleaner than having any audible benefit, I would agree with you. Just ordered some 16awg wire because I reached the conclusion the 12awg would be close to impossible to run through the grommet x 2.
ryanjg11 is offline   Reply With Quote
Old 08-09-2009, 09:34 PM   #7
bpang1
Scooby Specialist
 
Member#: 67225
Join Date: Jul 2004
Chapter/Region: NWIC
Location: Spokane, WA
Vehicle:
2004 WRX Wagon
JBP

Default

Other than posting some pictures and telling your friends...you'll be the only one that knows about such cleanliness...good on you though for doing the extra work.

Now you'll have to take out a couple other trim pieces.
bpang1 is offline   Reply With Quote
Old 08-09-2009, 09:55 PM   #8
Debevemos
Scooby Newbie
 
Member#: 159234
Join Date: Sep 2007
Chapter/Region: NWIC
Location: Woodinville, WA
Vehicle:
08 Outback Sport
Black

Default

So after reading this I am assuming that I should plan on running new wiring to my components if I'm planning on having them powered with 150x2. Should I go with 16 gauge or would 12 gauge be more appropriate?

Thanks
Debevemos is offline   Reply With Quote
Old 08-09-2009, 10:01 PM   #9
ryanjg11
Scooby Newbie
 
Member#: 214071
Join Date: Jun 2009
Chapter/Region: NWIC
Location: Seattle, WA
Vehicle:
2007 Subaru WRX STI
Black

Default

No, there won't be a problem with using 16awg even if your runs are 15 feet long, at 150 watts and 4ohms. Even using 16awg will only result in a less than 1v voltage drop and 0.2 decibal loss according to the BCAE calculator.

And 16awg will be a lot easier to run, especially if you are forcing it through the door jams.
ryanjg11 is offline   Reply With Quote
Old 08-10-2009, 12:33 AM   #10
couchflambeau
Scooby Specialist
 
Member#: 102145
Join Date: Dec 2005
Chapter/Region: MWSOC
Location: Grand Forks, ND
Vehicle:
'04 STi/Cobb St. II
18L Java Black Pearl

Default

Crossovers tend to be susceptible to vibration and moisture... wouldn't locate them in the doors in my car... and the factory wiring is usable but cheezy. I don't use factory speaker wiring for anything other than the LED indicators on the top of the door panel... so I guess the factory wiring IS good for something...

16 ga is fine... regardless of published loss, most people don't LISTEN to 150 wpc continuously (unless you're into test tones and pink noise)....
couchflambeau is offline   Reply With Quote
Old 08-10-2009, 12:39 AM   #11
LastResort
Scooby Guru
 
Member#: 99289
Join Date: Oct 2005
Default

Your solution to the moisture problem:
http://www.mcmelectronics.com/produc...LAID=220229316

Vibration? Solid mounting.
LastResort is offline   Reply With Quote
Old 08-10-2009, 01:56 PM   #12
lawrence131
Scooby Newbie
 
Member#: 122154
Join Date: Aug 2006
Vehicle:
2002 WRX
Blue

Default

couchflambeau's comments are great if you have the time/skill to go through all that effort but I along with 99%+ of the audio world use passive crossovers in the doors without any vibration or moisture problems. I have just setup my third Impreza last week this way and my '02 WRX and wife's 03 RS are also fine. I don't know if I've even heard of anyone who ruined their crossover from moisture let alone see it myself.

As for replacing stock wiring... I strongly favor this as well when I have a lot of free time on my hands but honestly could not tell an ounce of difference (but it makes me psychologically happier). This is after comparing 3 nearly identical Impreza's over 3-4 years. On the one that I did re-wire, I'm very happy with it just knowing in my head that the entire car is running 16ga Stingers without an inch of stock cable, BUT after spending hours redoing this on full Phoenix Gold Xenon series setup (amp, sub, components), I honest can't tell the difference. My old WRX and brand new Sport Wagon are running stock wires and the wife's Impreza is all 16ga Stingers.

IMO if you have an extra couple of hours on your hands and a few extra dollars to kill, spend that time/money on sound dampening will yield more real-world audio quality difference than redoing the wiring. If you're not a pro it really will take an extra couple of hours to redo the wiring and custom mounting the crossovers on the amp (it took me easily over 2 hours but this was only on the second impreza I've done, maybe even 3-4 hours, but I'm slow and very meticulous).
lawrence131 is offline   Reply With Quote
Reply

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Quick question about splicing into stock speaker wires 02blueru Car Audio, Video & Security 19 07-20-2006 12:04 PM
Stock speaker wiring kinger Car Audio, Video & Security 7 04-12-2004 11:49 AM
Should I replace the stock speaker wires with thicker ones? Heather Car Audio, Video & Security 6 07-27-2003 04:45 PM
Stock speaker wire gauge? FiveStar Car Audio, Video & Security 3 03-10-2002 09:16 PM
thickness of stock speaker wire? elemental Car Audio, Video & Security 3 12-27-2000 06:34 PM


All times are GMT -4. The time now is 04:03 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.