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Voice coil makes burning smell

Not sure on how to adjust amp feel like i am putting stress on sub do to my adjustment

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A lot of subs will make a smell when hot. if there is no indication of blown subs turn your gain down on the amp a quarter turn see if that helps. same with bass boost.

Posted on Jan 09, 2009

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My mtx thunder 421d I just got has the red light staying on all the time, I have hooked up a rca converter and the amp wont play my sub, is that light supposed to be red all the time.


The LED should be red. If you are not getting power to the sub, make sure the speakers are connected properly to the amp. Also make sure that the gain control is turned up. If it is all the way down, you will not hear anything from the sub(s). If none of that works, it is possible that you have a blown sub. If you smell a burnt smell near the speaker magnet, there is damage to the voice coil in the sub.

Feb 25, 2011 | MTX Thunder 421D Car Audio Amplifier

1 Answer

What is the best adjustment for a Nitro BMW 481 with one 12" Memphis subwoofer?


First you need to determine what kind of subwoofer it is and by that i mean, is it a dual voice coil subwoofer or a single voice coil sub woofer.
Dual voice coil(DVC)
Depending on how many Ohms each voice coil is you will have the amplifier drive a specific load (4OHM stereo (75 RMS x 2) 150RMS total power / 2OHM stereo(100RMS x 2) 200RMS total power) Connect each voice coils separatley to each speaker output of the amplifier for this configaration. Always making sure that the + & - of each voice coil go to the coresponding location of the speaker outputs of your amplifier.

If your sub woofer is a single 4OHM voice coil then your cables should be connected to the coresponding location on your amplifier which states "BRIDGED" It is marked clearly on the speaker outputs of your amplfier.

If it is a 2OHM then do not connect it to the amplifier. The specific amplifier is not stable at 2OHMS bridged and will most likely get damaged if you try to operate it at that OHM load.

IMPORTANT:
On the side of the amplifier where the adjustments are there is a switch that indicates X-OVER. (LPF/HPF/FULL) Make sure to set it to LPF (Low Pass Filter). (not doing so can damage the subwoofer)
On the left hand side of the X-OVER there is the adjustment for the LPF (30-250) the best setting would be at the same frequency that your speakers stop
(example):
If your speakers have a frequency response of 60Hz to 20KHz then setting your LPF to roughly 70 to 80 will be ideal. The rule is that where one speaker drivers frequency ends, the other must continue in order to complete the full range of audible frequencies.

if you have any more questions feel free to ask.
Respectfully
dreamsystems

Feb 05, 2011 | Nitro BMW-481 Car Audio Amplifier

2 Answers

Subwoofers don't work


the voice coils are probably fried. you may want to check your amps to see if they are putting out dc voltage. you may be abel to find a place that can fix the subs. otherwise you will need to replace them.

May 06, 2010 | Sony 12" Single-Voice-Coil 4-Ohm Subwoofer

3 Answers

4 plugs on each speaker i only have two wires from my amp


The reason you have 4 plugs on your sub is because it has a dual voice coil. It is basically like having 2 subs in one. You have 2 wiring options you can wire in 2ohm or 8 ohm loads. most amps are 1,2,or 4 ohm so i suggest going 2 ohm. The amp should be rated for 800-1200Watts @ 2 ohm load for this sub to work properly and make sure that amp is at max 80% by adjusting gain.This website will help with wiring be sure to note that for 2 ohm load the + are hooked up together. and the - are hooked together a parrallel ciruit.
http://www.the12volt.com/caraudio/woofer_configurations.asp?Q=1&I=42#results
Good Luck and enjoy

Mar 26, 2010 | Coustic Car Audio CF1244 Car Subwoofer

1 Answer

Thinking of getting 2 Kenwood - 10" 4-Ohm Single-Voice-Coil Subwoofers what power amp should i get?


Alll depends on what the peak power of subs is. You must remember you want a lower watt amp than your speakers or there put under a lot of stress and you will most likely blow the subs, or you'll have **** quality.. you must also remember if your using a high wattage amp you gotta make sure you have a good alternator, and you should probably invest in a battery canister so not as much power is drawn from the battery, if you are putting out 1200 watts, invest in a bigger battery.
good luck.

Oct 06, 2009 | Kenwood 12" 4-Ohm Single-Voice-Coil...

1 Answer

Wiring a sub with duel voice coil


In short yes. And is very common even has its own term called bridged. Taking two channels and making them one. I would hope that you are running a cap. that's going to put out a lot of power and stress on your battery

Feb 10, 2009 | Lanzar (MAXP154D) 15'' 2000 Watt Dual...

1 Answer

Amp Was Extremely Hot and I Have Now Lost All Sound


Where was the smell coming from? The amp or the sub?

Do you have an ohmmeter to check to see if the sub's voice coils are still intact? Can you try driving the subs with another source to verify they are ok? We need to eliminate the variables here.

If the subs are okay then it's obvious that the problem is in the amp. I'm not sure if there are any protection devices internal to the amp, but I am sure if you remove the cover from the amp and if it was amp that was producing the burnt smell, you'll have no trouble visually identifying where the problem is in the amp. Most likely you'll find a part that is discolored or black & burned.

Usually a smell like this from a solid state device indicates a component has been overheated and if run long enough in this condition will fail.

- Jim


- Jim

Jul 07, 2008 | Alpine 600W Class D Mono MOSFET Amplifier...

1 Answer

Dual voice coil speakers


best way to do this to preserve your amp and speaker is to wire the speaker Voice coils in series.

VC1 = Voice coil 1

AMP + to VC1 +
VC1 - to VC2 +
VC2 - to Amp -

Set you amps bass gain down very low. Crank up the volume with a bass test audio track. Turn the switch to LPF or Low pass filter. Adjust a LPF to about 60 hz Adjust the bass gain up until your Sub begins to sound sitorted or choppy. Then tune the bass gain just below where it distorts. Then you are set.

Dec 07, 2007 | Jl Audio 12W6v2 Car Subwoofer

1 Answer

Installation


Hi JJerky,

I suggest we go for 2 ohm to preserve the amp and not heat things up so bad.
Your Subs are Dual Voice Coil(DVC) and 2 ohms each coil. I am going to tell you the wiring to insure you get balanced response from both Subs. We will wire the Subs Voice coils in Parallel to make them 1 ohm each. Then we will wire the Amp to the subs in series to make the total load on the amp 2 ohms. When you have series to both subs each sub gets the same current.


Example of my coding :SUB1VC1+ = Subwoofer 1 Voice Coil 1 Postive terminal.

SUB1VC1+ to SUB1VC2+
SUB1VC1 - to SUB1VC2-

SUB2VC1 + to SUB2VC2 +
SUB2VC1 - to SUB2VC2 -

AMP + to SUB1VC1 +
SUB1VC1 - to SUB2VC1 +
SUB2VC1 - to AMP -

This should give you a good repsonse.

Adjust your Bass Gain down very low at first. Also cut you LPF to about 60 hz. Crank up the volume on a bass test Audio track, Adjust the Bass Gain up unitl you get distortion. The turn it back a little. This is proper setting for your Gain.

Dec 01, 2007 | Lanzar OPTI1222D Car Subwoofer

1 Answer

The light on top on my MRP-M450 blinks and the amp doesn't work


Well if you took off the cover on the amp and nothing seems to be burn't, check the voice coils on the sub. It's possible the voice coils have separated and is causing the amp to short it self out due to ground error. If that doesn't help let me know and I'll tell you the next step.

Sep 29, 2007 | Alpine MRP-M450 Car Audio Amplifier

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