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Sub woofer freq prob

I have a new JBL 4ch amp GTO750II
I have one MTX 10"
The unit is bridged.
No matter how I adjust it always buzzes at one cirtain frequency range.  I swapped w/ another new sub and the same thing.

why?

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Also if you are running the power cable and the leads down the same side this some times causes a noise known as engine noise try running them down either side.

Posted on Jan 22, 2008

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Without hearing the noise, it's difficult to determine the exact cause. I've seen enclosures do this if the panels were not glued together well.

 

Try connecting the speaker to one channel at a time to see if one particular channel causes the problem.

Posted on Oct 12, 2007

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1 Answer

My JBL subwoofer just buzzes when I turn it on. It doesnt seem to change anything if I plug it into a powerstrip or the wall. It also doesnt seem to matter what setting it is on, all that changes is the...


It is possible that the amplifier within the unit is faulty; The best you can do is to put the woofer ON for about 12 hours so that if there is any chance of any capacitors being faulty or has electrlytic drying.
if this wont solve the unit must be opened to check the amplifier. Possible failure of the input source selector as the woofer is humming.

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How can i bridge a mtx 9500 using a mono amp?


You cant bridge it to the MONO AMP . You can only bridge subs & speakers to 2 CH & 4 CH AMPS that are bridgeable. Because if it appears that there is 2 channels on a Mono amp its so its convenient for you to hook up 2 4ohm subs to it easily But both channels are actually connect internally together in parallel inside the amp unlike a 2 channel they are separate.

So just connect your mtx 9500 to a plus and a minus and doesnt matter which since all the + terminals of are connected together and - are connected together already.

Whats important is on the side of the sub/box it reads 2 ohms. The lower the ohms the more power the Mono amp will put out. Mono amps are designed to handle 2ohm loads.

If it reads 4ohms The MONO amp is the wrong amp to use cause the power will be weaker. So if you have a 1000 Watt Mono amp at 4ohms the sub will only get 500 WATTS Max while a 2 ohm will get the full 1000 Watts.

If it reads 4 ohms connect it to a 2CHANNEL AMP and BRIDGE IT (connect + of the sub to 1st channels positive of the amp then connect - of the sub to 2nd channels negative of the amp) . The power will be doubled when you bridge it on a 2 channel amp. NOW if it was a 2 ohm sub and you bridged it to the 2 channel amp it will fry the subs and ruin the amp. 2 CHANNELS CANT TAKE A 2OHM LOAD BRIDGED OK.

Apr 08, 2010 | MTX (SLH-T7512X2-A) Car Speaker

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2 MTX Thunder Problem.. Bridging?


Is there a option on the chanels that say ''Bridged''? If so, you can hook the subs up in parellel or series to get different ohm loads. Usually the lower ohms, the more power amp puts out. Those subs can handle 225 watts RMS whitch means the power it can handle constantly. If the amp gives more than 225 watts RMs, you could be at risk of blowing the sub. If you could give me the model # of the amp, I can be of more help.

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I'm having problems getting full power to my sub.


when bridgeing an amplifier it always sees half of whatever load you have on it, so if you have a 4ohm speaker when it is bridged the amp will see 2ohms, so yes you can bridge the 4 ohm speaker

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I need to no how to bridge a mtx thunder TA5601 Amp


I hesitate to answer this question for fear that you will not like the answer even if it is the truth. I have received a bad rating from a couple of people in the past just because the right answer was not what they wanted to hear.

This is a mono sub-woofer amp, which means that it is already bridged internally. You only have one speaker output in this amp, that means that the amp circuit is bridged inside, it is not split into two channels.

To bridge any output, it requires 2 channels, otherwise there is nothing to bridge.

I have been repairing car amplifiers for over 18 years, and I promise you that there is no way to bridge a single channel amp. Bridging means to convert 2 channels into 1 channel. If all you have is one channel, then there is nothing left to bridge.

I hope this explains it for you, if you have any other questions feel free to post them here and I will answer as soon as possible.

And please do not punish me with a bad rating if you do not like the answer, it is the correct answer, and sometimes the right answer is not always what we want to hear, but it does not make it wrong.

Dave

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HOW TO CONNECT SUB WOOFER IN 4CH CAR AMP


sounds like you need another amp, if the amp has a speaker already connected to each channel, you have no open channel to connect a sub-woofer.
Some years ago I seen an amplifier that was designed to use 3 speakers on 2 channels. what they did was had a speaker on each channel and then they bridged the 3rd speaker across it. That amplifier was designed for this configuration, unless you have an amplifier like that you should not try it. It may result in smoke from the amp.

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Your speaker has dual voice coils. You can hook it up so that it is 2 ohm or 4 ohm depending on wat the amp can handle. You can try hooking it up by matching the colors or like any other speaker.

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Carlos


i have a 81000d for sale for 250 dollars car money still in perfect condition i am pushing 3 12 inch alpine type r subs

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bridge it and rear channel if you need to know how to bridge let me know

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