sigh how to bridge?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=112776
Printed Date: July 16, 2025 at 7:08 AM
Topic: sigh how to bridge?
Posted By: nvisible1
Subject: sigh how to bridge?
Date Posted: March 29, 2009 at 9:09 PM
how do you bridge a 2 channel amp with 2 subs, been lookin still not understanding...
Replies:
Posted By: DYohn
Date Posted: March 29, 2009 at 9:17 PM
What amp? What subs? ------------- Support the12volt.com
Posted By: nvisible1
Date Posted: March 29, 2009 at 10:06 PM
i got 2 12'' dual voice coil 1500 watt max subs and ima have a 2 channel 1500 max merlin audio amp...
Posted By: mattb21
Date Posted: March 29, 2009 at 11:02 PM
How many ohms are the voice coils?
Posted By: nvisible1
Date Posted: March 29, 2009 at 11:14 PM
I'm really not sure....the paper says...
resistance is 2x3.2 ohms then
nominal impedance is 2x4 ohms...
can you tell me?.....
Posted By: jm15
Date Posted: March 29, 2009 at 11:41 PM
i would say you wire the subs in series. but i'm just a rook
-------------
Tell it like it is
Posted By: mattb21
Date Posted: March 30, 2009 at 2:00 AM
Could you give a model number or something on the amp? I can't seem to find any information on a "2 channel 1500 watt max merlin amp."
Posted By: icearrow6
Date Posted: March 30, 2009 at 2:39 PM
Wire the coils on EACH speaker in series.
see the pic here:
https://media.photobucket.com/image/kicker%20manual%20series/twan_csi/kicker.jpg
This will yield each sub at 8ohm.
Now put BOTH positives and negatives together from the speakers to the "bridge" on the amp.
On the Amp is usually its marked.
Posted By: icearrow6
Date Posted: March 30, 2009 at 2:40 PM
here is how they BOTH should be like. 
Posted By: i am an idiot
Date Posted: March 30, 2009 at 4:21 PM
You need to follow the above picture. That is the only safe way to bridge that amplifier. Why do you want to bridge the amp? You will gain no power unless you have (2) 8 ohm woofers.
Posted By: nvisible1
Date Posted: March 30, 2009 at 4:28 PM
thanks for tha help, i want to bridge for more power but i dont really know what the ohms are on my subs....all i got is...
resistance is 2x3.2 ohms then
nominal impedance is 2x4 ohms...
so.....
Posted By: biowyo
Date Posted: March 30, 2009 at 5:12 PM
nominal resistance is 4 ohms + 4 0hms that means each coil is a 4 ohm coil so the above diagram is 1 possibility. It really depends on the amps minimum ohm load that it can accept.
Posted By: icearrow6
Date Posted: March 30, 2009 at 5:16 PM
Wire it like the picture...I'd say that its the best way. The NOMINAL impedance is 4ohm. so you have dual 4ohm speakers. MOST(95%) two channel amps that are bridgeable have a minimal of 4ohm load when bridged...or 2ohm stereo (not bridged). So use this set up.
Posted By: biowyo
Date Posted: March 30, 2009 at 5:34 PM
Icearrow6 is correct , most bridgeable 2 channel amps are 4 ohm bridged. JL is 1 exception that comes to mind right away though, (just not a huge fan of JL) good product, but too spendy for me lolz
Posted By: nvisible1
Date Posted: March 30, 2009 at 10:50 PM
alright, thanks everyone....
Posted By: nvisible1
Date Posted: March 30, 2009 at 10:52 PM
so i should wire them parallel or whatever
Posted By: i am an idiot
Date Posted: March 31, 2009 at 6:11 AM
You will have to wire the speakers in series for an 8 ohm load. You will not gain any power at all.
Posted By: nvisible1
Date Posted: March 31, 2009 at 1:39 PM
alright...if I bridge the subs and have both of them on 1 channel...how many ohms is the amp pushin out...
Posted By: icearrow6
Date Posted: April 01, 2009 at 2:58 PM
Te picture shows a series/parallel setup. The speakers are first in series and then parallel to the amp. You are getting a total of 4ohm load on the amp. This is the ideal setup for the "bridge" on your amp.
Posted By: i am an idiot
Date Posted: April 01, 2009 at 4:20 PM
Bridge = 2 separate channels into a common load. You can not bridge it on one channel. It depends on how you have the speakers wired (Series or Parallel) as to what ohm load the amp will be seeing.
Posted By: nvisible1
Date Posted: April 16, 2009 at 5:50 PM
alright, update, i got 2 12'' q-power 1500 watt max subs, dual voice coils..blah blah, now i got a 1200 watt power acoustik amp, now how can i bridge the subs to the amp without the fuse blowing up?...
Posted By: i am an idiot
Date Posted: April 16, 2009 at 6:11 PM
The speakers are dual voice coil with ___ Ohm coils. What is the minimum safe operating impedance of the 1200 watt power acoustik amplifier?
Posted By: nvisible1
Date Posted: April 16, 2009 at 10:17 PM
ok, new update to the old update, i got a new amp, 1600 watt performance technike or however you spell it...i think tha amp is 2 ohm stable...and theres no specific on tha ohms of the subs,
Posted By: nvisible1
Date Posted: April 16, 2009 at 10:18 PM
resistance is 2x3.2 ohms then
nominal impedance is 2x4 ohms...
Posted By: i am an idiot
Date Posted: April 16, 2009 at 10:29 PM
is the amp a one channel or two channel amp?
Posted By: nvisible1
Date Posted: April 16, 2009 at 10:40 PM
2 channel amp my son.....
Posted By: nvisible1
Date Posted: April 16, 2009 at 10:44 PM
https://www.performance-teknique.com/Amp-890_2ch.html
1600 watt is mine...
Posted By: i am an idiot
Date Posted: April 16, 2009 at 10:53 PM
You need to wire the voice coils of each woofer in parallel. Then connect one speaker to each channel of the amp. This is to be done on each channel of the amp. Do not bridge the amp. Option 1 (parallel) = 2 ohm load
Voice coils wired in parallel
Recommended Amplifier: Stable at 2 or 1 ohm mono | 
|
Posted By: nvisible1
Date Posted: April 16, 2009 at 10:58 PM
ahhh, thats how i have it already, i thought i could wire my subs like that then wire them to the amp in bridge mode or however you say it....what does it mean if i turn the volume of my deck up then my amp shuts off and i gotta take the deck off then put it back on so it'll beat aain?...
Posted By: i am an idiot
Date Posted: April 16, 2009 at 11:13 PM
It sounds like your amp is going into protection. Does it have a Protect light on it? When it shuts off, is this light on instead of the power light?
Posted By: nvisible1
Date Posted: April 16, 2009 at 11:15 PM
i shoulda re-worded it, yea its in protection but why, gain and doodie is too high im guessin'....
Posted By: i am an idiot
Date Posted: April 16, 2009 at 11:21 PM
Too low of an Ohm load, bad power or ground connection, the amp is being overdriven and it is trying to protect your speakers. Could be any of those, never heard of doodie causing an amp to go into protect.
Posted By: nvisible1
Date Posted: April 16, 2009 at 11:27 PM
alright then son, and your not an idiot...
Posted By: nvisible1
Date Posted: April 17, 2009 at 11:23 PM
yea doodie will do it sometime but, another question, i bought my speakers brand spankin new, hooked them to the amp, worked fine, no prob, then i tried to bridge them to the amp, a big no-no im findin out, now every time i hook a sub to a channel it makes this rediculous pounding even when the song is paused, holler at me mr idiot....
Posted By: i am an idiot
Date Posted: April 18, 2009 at 12:20 AM
Posted By: haemphyst
Date Posted: April 18, 2009 at 8:48 AM
nvisible1 wrote:
ahhh, thats how i have it already, i thought i could wire my subs like that then wire them to the amp in bridge mode or however you say it....what does it mean if i turn the volume of my deck up then my amp shuts off and i gotta take the deck off then put it back on so it'll beat aain?...
Wait... So you say you wired BOTH woofers in parallel, and then you STILL bridged the amp? That's .5 ohms, dude, as in ONE HALF OHM. Four times what the amp is designed to run. Wire them in stereo mode, with one woofer on each terminal. i am an idiot even told you to not bridge the amp.
nvisible1 wrote:
yea doodie will do it sometime but, another question, i bought my speakers brand spankin new, hooked them to the amp, worked fine, no prob, then i tried to bridge them to the amp, a big no-no im findin out, now every time i hook a sub to a channel it makes this rediculous pounding even when the song is paused, holler at me mr idiot....
If you did it (bridged the amp) anyway, and now the amp is doing things it didn't USED to do, then you may have damaged it. It's likely fried. ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: nvisible1
Date Posted: April 18, 2009 at 10:46 AM
I guess I'll never do dumb doodie like that again...thanks for that replies fellers...
|