CarAudioForum.com

Go Back   CarAudioForum.com > Discussion Forums > Car Audio: Installation Help

Reply
Old 08-09-2000, 08:11 PM   #1
jayhawk

Junior Member
 
Join Date: Aug 2000
Location: Lawton, OK USA
Posts: 4
jayhawk is on a distinguished road



How do you wire three speakers to one amp????

I was thinking of getting three speakers and wondered how to do it. Could I twist all the negative wires together and twist all the positive wires together then bridge them all? Any help would be cool.
jayhawk is offline   Reply With Quote

Sponsored Links
Help Syrian Refugees Survive. Donate Now!
Or text REFUGEES to 50555 to give $10 to USA for UNHCR
Old 08-10-2000, 07:33 AM   #2
Belker

Senior Member
 
Join Date: Feb 2000
Location: Morgantown, WV
Posts: 912
Belker will become famous soon enoughBelker will become famous soon enough



The wiring connection you described is called parallel wiring. Keep in mind that if you use 3 4ohm speakers you will present the amplifier with a 0.75ohm load. The amp has to be designed to handle 3/4ohm bridged. Most amps can't and would fry.

What kind of speakers and amp were you planning to use?
Belker is offline   Reply With Quote

Old 08-10-2000, 03:03 PM   #3
Skipp

Advisor to The President
 
Join Date: Apr 2000
Location: SimCity
Posts: 3,783
Skipp is an unknown quantity at this point



You could also get a tri-mode capable amp. They are usually used for driving a pair of rear speakers and a sub, but what are you planning on doing here?
Skipp is offline   Reply With Quote

Old 08-10-2000, 06:20 PM   #4
brooklynplaya

Junior Member
 
Join Date: Aug 2000
Location: Brooklyn,NY
Posts: 2
brooklynplaya is on a distinguished road



Actually its not .75 ohms for the three parallel speakers; for 2 4ohms in parallel equals 2 ohms;the equivalent resistance combined with the remaining 4ohm equals 1.33ohms...
brooklynplaya is offline   Reply With Quote

Old 08-11-2000, 10:12 AM   #5
Belker

Senior Member
 
Join Date: Feb 2000
Location: Morgantown, WV
Posts: 912
Belker will become famous soon enoughBelker will become famous soon enough



brooklynplaya - thank you for correcting my math error, you are correct - it is 1 1/3 ohms.

This is still a low imedance for most amps to handle in a bridged mono config. Consideration must be taken when selecting either the amp or the speakers.

Sorry about my math error.
Belker is offline   Reply With Quote

Old 08-11-2000, 08:42 PM   #6
jayhawk

Junior Member
 
Join Date: Aug 2000
Location: Lawton, OK USA
Posts: 4
jayhawk is on a distinguished road



Quote:
Originally posted by jayhawk:
I was thinking of getting three speakers and wondered how to do it. Could I twist all the negative wires together and twist all the positive wires together then bridge them all? Any help would be cool.
Could I do it with 3 8ohm speakers?
jayhawk is offline   Reply With Quote

Old 08-12-2000, 08:06 AM   #7
Belker

Senior Member
 
Join Date: Feb 2000
Location: Morgantown, WV
Posts: 912
Belker will become famous soon enoughBelker will become famous soon enough



The imedance of three 8 ohm speakers wired in parallel is

1/R = 1/8 + 1/8 + 1/8 = 3/8

so R = 8/3 or 2.67 ohms.

It will be much easier to find an amp that is stable in a bridged mono configuration at 2 ohms or greater. However, there are still many amps available that are only stable at 4 ohms bridged mono. Just be sure to check it our before you buy an amp.
Belker is offline   Reply With Quote

Old 08-12-2000, 06:00 PM   #8
jayhawk

Junior Member
 
Join Date: Aug 2000
Location: Lawton, OK USA
Posts: 4
jayhawk is on a distinguished road



Thanks guys especially Belker. You're help is greatly appreciated.
jayhawk is offline   Reply With Quote

Old 08-15-2000, 04:24 PM   #9
kendogg1

Member
 
Join Date: May 2000
Location: Sandy Creek, NY, USA
Posts: 67
kendogg1 is on a distinguished road



You could just buy three 10-WO-12's, which are 12-ohm subs. Three 12ohm subs wired in parellel gives you a 4-ohm load.
kendogg1 is offline   Reply With Quote

Old 08-15-2000, 07:08 PM   #10
jayhawk

Junior Member
 
Join Date: Aug 2000
Location: Lawton, OK USA
Posts: 4
jayhawk is on a distinguished road



Are all the JL WO's 12 ohm subs?
jayhawk is offline   Reply With Quote

Old 08-27-2000, 08:25 PM   #11
Mxyzptlk

Member
 
Join Date: Jul 2000
Location: Richardson, TX 75081
Posts: 42
Mxyzptlk is on a distinguished road



ok, using the formula staed earlier, does that mean 3 6ohm subs present a 2 ohm load?

and 4 4ohms present 1 ohm load?

does that mean that 2 4ohm DVCs present a 1ohm load as well?
Mxyzptlk is offline   Reply With Quote

Old 08-30-2000, 07:14 PM   #12
soundclash

Member
 
Join Date: Aug 2000
Location: LA, Ca USA
Posts: 62
soundclash is on a distinguished road



The better question is what is your plan? What kind of sound do you want? Knowing the ohm loads in different wiring configs is important, but doesn't mean a helluva lot when you don't have any subs, amps, or others in mind.
soundclash is offline   Reply With Quote

Old 08-30-2000, 08:54 PM   #13
shootme5150

Fat Drunken Bastard
 
Join Date: Mar 2000
Location: thornton, CO
Posts: 21,971
shootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond reputeshootme5150 has a reputation beyond repute



jayhawk - no, I'm pretty sure you can get them in 4 and maybe 8 as well. Check JLs website to make sure.

mxy - yep, that's right.
shootme5150 is offline   Reply With Quote

Reply

Bookmarks

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 Off
HTML code is Off

Forum Jump


All times are GMT. The time now is 01:14 AM.
Powered by vBulletin® - Copyright © 2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 1996 - 2011 by CarAudioForum.com - all rights reserved.