fuse keeps blowing, MTX 1501
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=38944
Printed Date: May 03, 2024 at 7:23 AM
Topic: fuse keeps blowing, MTX 1501
Posted By: lilboi
Subject: fuse keeps blowing, MTX 1501
Date Posted: September 10, 2004 at 7:06 PM
Alright, i have a MTX 1501 amp. Today , all of a sudden my fuse blew. I put a new fuse, and that blew too. I have a cap in between the amp and the battery. What could be the problem? did i blow my amp? I did not pump it up at all. Battery ----- Cap ----- AMP
ground -----/ \-------/
That's how i wired it. Could it be the cap? or is it the amp dead? I tried putting a fuse first then put in then plug in the ground. It just sparked then the fuse blew. I need help I've been using the amp for more then 3 months with out a single problem.
Replies:
Posted By: 12-volt_guy
Date Posted: September 10, 2004 at 7:23 PM
Disconnect the speakers from the amp (at the amp). Try the fuse again. If it blows, bad amp. If it doesn't blow, check the speaker wire for a short somewhere. Easy way to do this is with a 1.5-volt flashlight battery. Connect one side of battery to ground in car and touch each speaker wire one at a time to the other side of battery. If you hear any static coming from the speaker, you have a shorted wire.
Posted By: forbidden
Date Posted: September 10, 2004 at 9:40 PM
Disconnect the rca leads as well, they too can be dead shorting. Ensure that your ground is good and tight on both the cap and chassis ground.
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Top Secret, I can tell you but then my wife will kill me.
Posted By: lilboi
Date Posted: September 10, 2004 at 10:15 PM
Yea i dissconnected everything. So i pluged in the power and ground. and tried it again. It still blows. Does this have to do anything with the cap? any other problems?
Posted By: Ravendarat
Date Posted: September 10, 2004 at 10:36 PM
Is it the fuse in the amp or the one under the hood. If its the one in the amp then I suggest you try to bypass the cap and if it still blows then its the amp. If it is the one under the hood then try disconnecting the amp and replace teh fuse under the hood. It could be a dead short in the wire. ------------- double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: lilboi
Date Posted: September 10, 2004 at 11:38 PM
I actually have two fuses, one under hood. And one for my distrubutor.
Posted By: jeffchilcott
Date Posted: September 11, 2004 at 11:05 AM
so which one is blowing both?
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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
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Posted By: lilboi
Date Posted: September 11, 2004 at 1:35 PM
yea both are blowing
Posted By: lilboi
Date Posted: September 11, 2004 at 1:35 PM
yea both are blowing, well one at a time.
Posted By: kgerry
Date Posted: September 11, 2004 at 2:39 PM
disconnect power to the amp and replace the fuse... did it blow? which one? disconnection the cap... replace the fuse... did it blow? you have one of three possible scenarios... a short on the power cable... a short internally in the cap... or a short internally in the amp...... or possibly wierdly a short in the distribution block if it happens to be a dual power/ground split dist block..... it shouldnt be that hard to narrow down, disconnect one item at a time until you no longer blow a fuse... that will be the culprit ------------- Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: lilboi
Date Posted: September 12, 2004 at 2:08 AM
arg.. i'm afraid that i blew my amp. But usually when you do. i don't think that the it links the positive and ground together. anything helps. need feedback
Posted By: Ravendarat
Date Posted: September 12, 2004 at 9:56 AM
If you are blowing both fuses I would be far more suspicious of either the cap or a short in the power line. It is unlikley the amp is causing both fuses to blow. If you cant figure this out yourself you might wanna try to take it into a shop and have them look at it. It never hurts to get a second set of eyes involved when you cant figure something like this out.
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: lilboi
Date Posted: September 12, 2004 at 1:01 PM
So it us unlikely that an amp will create a short?
Posted By: Ravendarat
Date Posted: September 12, 2004 at 9:29 PM
If the amp creates the short It is very unlikely it will blow BOTH fuses but I have seen shorts in caps and power wire blow both fuses before. On RF amps from the last few years you must fuse them externally. I have seen customers come back after self installs were they were blowing fuse and one guy had the power wire pinched in the hood hinge (you heard me) and the other customer had a cap that had shorted out and he didnt know it. Every time he replaced fuses they blew.
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: bumpingjeep
Date Posted: September 12, 2004 at 11:32 PM
try taking it to a shop...i agree with a second set of eyes looking at it...i'm all about fixing everything myself without taking things elsewhere also...but sounds like you could have already paid to have it fixed with the money you have in fuses
Posted By: bumpingjeep
Date Posted: September 12, 2004 at 11:35 PM
by the way...what size power wire do you have...and is it the same all the way from the battery to the amp?
Posted By: lilboi
Date Posted: September 13, 2004 at 10:25 PM
It's 4gauge. The wires shouldn't be the problem cause the amp worked for about 3 months.
Posted By: Ravendarat
Date Posted: September 14, 2004 at 12:35 AM
That means nothing, problems can easily manifest themselves over time. Dont over look anything
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: lilboi
Date Posted: September 14, 2004 at 12:54 AM
alright. But does an amp create a short when it blows? I thought it would just not turn on. When my bro blew his amp, it didn't short or blow a fuse.
Posted By: Ravendarat
Date Posted: September 14, 2004 at 1:12 AM
depends on what "blows" inside the amp. Sometimes it will and sometimes it wont. I cant give a better answer than that.
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double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer
Posted By: lilboi
Date Posted: September 16, 2004 at 9:49 PM
any one have this kind of issue with their amp? or had ever blown an amp? i need feedback.
Posted By: bumpingjeep
Date Posted: September 17, 2004 at 12:13 PM
main reason why i asked you about the power wire is because mtx's are very touchy...i've dealt with them a lot...while certain things are important for all amplifiers they are essential for longevity with mtx, especially the 1501D...you need to have at least 4 Guage all the way back, not split into 8 at a distribution block or anything...ground needs to be perfect...and NEVER...EVER...make any adjustments to the amp while it is on...no changing the gain, crossover, or boost...if you have ever done any of these things...you no longer have to guess why you are have a problem...and by the way...when the 1501 D's blow...they blow big and are usually followed by other problems...my advice...take it out of you car, so it is no longer hooked up to any of your other components like radio and subs that can be damaged...take into a shop somewhere and pay them 20 bucks to test it on their bench...you can do this at small shops or circuit city or best buy...it takes only minutes and may save you from doing damage to anything else in your system
Posted By: Velocity Motors
Date Posted: September 17, 2004 at 1:58 PM
Have you tested the power wire, ground and remote turn on lead for possible shorts ? Did your ground wire some how come loose ? Try taking this amp out of the car and reinstalling it into one of your buddies car's and see if it blows fuses too. Your not hurting anything if the fuse blows, that's why there's a fuse inline. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: bumpingjeep
Date Posted: September 17, 2004 at 6:49 PM
if you hook it up in one of your buddies vehicles make sure that you can afford to pay for there radio or their subs...because anytime you hook up a bad amp to a system problems can occur...true the power wire has and in-line fuse so your power wire or your car will not be harmed...but there is nothing prevent the wear and tear of bad signal or the wrong signal repeatedly if it keeps blowing fuses...by the way...anytime you buy an mtx amp you also get a 3yr manufacturers warranty instead of your average 1 yr...do not be discouraged too much if it is blown...i have seen mtx take care of many people in your same situation
Posted By: lilboi
Date Posted: September 18, 2004 at 2:52 PM
it just seems weird that it will short when it blew. I blew my brother's amp before, and it just doesn't turn on. It doesn't short ot anything. Maybe i'll try it in my brother's car without anything except power/remote/ground connencted.
Posted By: DYohn
Date Posted: September 18, 2004 at 3:01 PM
Disconnect your speaker wires and try to power on the amp. If the fuses still blow I'll bet your amp is fried. ------------- Support the12volt.com
Posted By: lilboi
Date Posted: September 18, 2004 at 5:07 PM
I disconnected everything except the + -. and it still blew. I'm going to try it in my brother's car, cause he doesn't have a cap.
Posted By: bumpingjeep
Date Posted: September 19, 2004 at 2:02 PM
have you had your amp for longer than three years?
Posted By: DYohn
Date Posted: September 19, 2004 at 3:12 PM
lilboi wrote:
I disconnected everything except the + -. and it still blew. I'm going to try it in my brother's car, cause he doesn't have a cap.
And what do you think a cap would have to do with anything? If by "+ and -" you mean main power and ground, then your amp is most likely toast. Sorry. ------------- Support the12volt.com
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