btl 18 ~ Excess glue burn off?

[Joseph M 0]

When i am playing Young Jeezy - Put On, with a saz 3k at .5 ohm with volts dropping no lower than 12.6 with the volume all the way up to what i would listen to other songs, i can smell somthing funky. is it excess glue burning off? or should that be my key to back it down?

[NDMstang65 403]

No it's not excess glue, your clipping the heck out of your amp and starting to burn your coils up. NEVER turn the volume all the way up, you shouldn't be running that amp at .5ohm either. That's going to cause the life of your equipment to go south really quick...

[Joseph M 0]

No it's not excess glue, your clipping the heck out of your amp and starting to burn your coils up. NEVER turn the volume all the way up, you shouldn't be running that amp at .5ohm either. That's going to cause the life of your equipment to go south really quick...

Clipping i thought was below like 12.2, do you have aim? i am going to hook it up to a O-scope and see if it is clipping. its not all the way up FYI jus all the way up to what i tuned it to, like 32 out of 50. and the gains arent even half way.

fyi: I have a 960mp, my aim is maggichandz if u can IM me. i'd apreciate it.

Edited July 2, 2008 by Joseph M

[NDMstang65 403]

Clipping has nothing to do with the dc voltage going to your amp. Clipping is the square wave of your RCA input signal, when you turn your volume all the way up you will get a dirty signal. Running that amp at .5ohm (which is really .35) is causing it to attempt to put out more current, than voltage. When you do this it will cause the coils to fail. More current is a bad thing, it's simple ohms law...

Impedance (resistance) goes down, Voltage goes down, and Current (heat) goes up...causing failure.

[Joseph M 0]

Clipping has nothing to do with the dc voltage going to your amp. Clipping is the square wave of your RCA input signal, when you turn your volume all the way up you will get a dirty signal. Running that amp at .5ohm (which is really .35) is causing it to attempt to put out more current, than voltage. When you do this it will cause the coils to fail. More current is a bad thing, it's simple ohms law...

Impedance (resistance) goes down, Voltage goes down, and Current (heat) goes up...causing failure.

i've never had my deck all the way up or even close but it would still send a bad signal at like 33/46?(w/e max is) its the premier 960mp

[NDMstang65 403]

Regardless, you are running your amp at too low of a load, it is putting out more current, than voltage. Causing a heat build up and the glue on the coil to start to melt.

Turn it down, don't run it that low...otherwise you will break it.

[Joseph M 0]

Regardless, you are running your amp at too low of a load, it is putting out more current, than voltage. Causing a heat build up and the glue on the coil to start to melt.

Turn it down, don't run it that low...otherwise you will break it.

is that jus to much power for that a single 18?

[cecaa850 0]

Regardless, you are running your amp at too low of a load, it is putting out more current, than voltage. Causing a heat build up and the glue on the coil to start to melt.

Turn it down, don't run it that low...otherwise you will break it.

is that jus to much power for that a single 18?

The magic smoke appears........................

[NDMstang65 403]

Regardless, you are running your amp at too low of a load, it is putting out more current, than voltage. Causing a heat build up and the glue on the coil to start to melt.

Turn it down, don't run it that low...otherwise you will break it.

is that jus to much power for that a single 18?

If you abuse it, yes. (hence the running at .35ohm)

If you don't..then no. Meade doesn't have a problem running tons of power, but his setup is tuned properly, and geared to handle the power and not burn things up.

[Joseph M 0]

Regardless, you are running your amp at too low of a load, it is putting out more current, than voltage. Causing a heat build up and the glue on the coil to start to melt.

Turn it down, don't run it that low...otherwise you will break it.

is that jus to much power for that a single 18?

The magic smoke appears........................

weird thats its jus that one song that i have ever smelt it. i even did a 55hz down to like 20hz and never smelt it.

[Joseph M 0]

could it be a bad quality of the song? i will go get it tuned by an O-Scope and go from there.

Edited July 2, 2008 by Joseph M

[BKOLFO4 29]

When you clip the 3000 watt RMS amp, you get more than 3000 watts RMS. In theory, if you could clip to the point of a squarewave without damaging the amp, you could get 6000 watts RMS.

When you smell coil getting hot, you are getting int he area of causing damage. . .

[Joseph M 0]

When you clip the 3000 watt RMS amp, you get more than 3000 watts RMS. In theory, if you could clip to the point of a squarewave without damaging the amp, you could get 6000 watts RMS.

When you smell coil getting hot, you are getting int he area of causing damage. . .

wow i take it thats why most of the top people have 0 scopes eh??

[theabunai 3]

Remember that Music is dynamic and it has peaks and valleys... not to mention recording volume.

Not only is an oscope a good idea but i would also plot the impedance rise since your running that amp at such a dangerous load, you may find that wih the impedance rise/fall you may be taking that amp well below the 1/2 ohm mark and as nick pointed out, the lower the impedance the more current (heat) goes up as a result of the voltage increase......

[BKOLFO4 29]

The worst part is people think the gain adjustment is a volume knob - If it is set at 1/2, then their 3000 watt amp can't make but 1500 watts. It is not a volume knob.

A "perfect" amplifier is nothing more than a gain device. A voltage signal input is multiplied and reproduced at a higher voltage. With not all input signal levels being the same, the gain adjustment was created.

Lets say your amp can produce a clean 40 volts on the output. If your amp's gain can be adjusted from 1 volt to 8 volts, that simply means:

If the gain is set at 1 volt, when one volt is applied, you get 40 volts on the output

If it is set at 4 volts, when you apply 4 volts, you get 40 volts on the output

If it is set at 8 volts, when you apply 8 volts, you get 40 volts on the output

You can see where this would cause problems with people thinking it is a volume control.

The user sets the gain "half way" thinking he will get half ouput. If "half way" is say the 2 volt setting and the user has 4 volt preouts, then the result is the amp is clipping LONG before the radio is at full volume.

As Nick mentioned, low impedance/high current throws another mix into everything. Not for the sub, but for the amp and the point at which the amp clips. The sub does not care - It has dual 1 ohm coils that will get X amount of current when voltage is applied.

For the amp, running lower impedances causes the need for changes to the gain setting that you will need experience and/or will have to measure to get correct.

Example:

3000 watts at 1 ohm requires 55 volts

3000 watts at 0.5 ohms requires 39 volts

Remember, your amp is a voltage gain device. If you set your gain based on the "normal" 55 volt output, you will be clipping the heck out of it running at 0.5 ohms.

These subs will handle 4000+ watts without any problem (and for long periods of time). If you smell glue with it on a 3000 watt amp, you are overdriving something. . .

Brian

[Joseph M 0]

The worst part is people think the gain adjustment is a volume knob - If it is set at 1/2, then their 3000 watt amp can't make but 1500 watts. It is not a volume knob.

A "perfect" amplifier is nothing more than a gain device. A voltage signal input is multiplied and reproduced at a higher voltage. With not all input signal levels being the same, the gain adjustment was created.

Lets say your amp can produce a clean 40 volts on the output. If your amp's gain can be adjusted from 1 volt to 8 volts, that simply means:

If the gain is set at 1 volt, when one volt is applied, you get 40 volts on the output

If it is set at 4 volts, when you apply 4 volts, you get 40 volts on the output

If it is set at 8 volts, when you apply 8 volts, you get 40 volts on the output

You can see where this would cause problems with people thinking it is a volume control.

The user sets the gain "half way" thinking he will get half ouput. If "half way" is say the 2 volt setting and the user has 4 volt preouts, then the result is the amp is clipping LONG before the radio is at full volume.

As Nick mentioned, low impedance/high current throws another mix into everything. Not for the sub, but for the amp and the point at which the amp clips. The sub does not care - It has dual 1 ohm coils that will get X amount of current when voltage is applied.

For the amp, running lower impedances causes the need for changes to the gain setting that you will need experience and/or will have to measure to get correct.

Example:

3000 watts at 1 ohm requires 55 volts

3000 watts at 0.5 ohms requires 39 volts

Remember, your amp is a voltage gain device. If you set your gain based on the "normal" 55 volt output, you will be clipping the heck out of it running at 0.5 ohms.

These subs will handle 4000+ watts without any problem (and for long periods of time). If you smell glue with it on a 3000 watt amp, you are overdriving something. . .

Brian

thanks Brian for the info. i will look into the pre outs and re do the gain. I just found the article Nikuk wrote and i am going to put that into affect to find out what exactly my IMP rise is. i am guessing but i dont think its that low.