Current draw- Tones vs. music?

[kr15 5,000+ posts]

I have heard that tones will draw more current opposed to music...Is there any truth to this?.....

I am gonna try and burp a DSC 1500.1 at 2ohm on 40a of fusing to a single 12. Im trying to figure out which way I should approach this. I am thinking i might see like a .5db-1 db gain on a tone, but if tones DO draw more current, I am wondering if that marginal gain is worth potentially blowing the fuse before I even get a solid burp...An alternative is running my Treo amp that is fused at 40a and assuring me a pretty solid burp. The thing with that is that I think I can pull 450rms out of my Treo amp. The DSC is obviously capable of a fair amount more at 2ohm. Another aspect is that with gains set fairly low on the mbq, there is no AUDIBLE difference between the 2 amps. (It would possibly show up on the meter tho)...so those with competing experience, what would you do? Sub is a Treo TSX12 in 1.63cu @35hz..Amps in question are mbq dsc1500 and treo tsx75.2. Currently have 4ga memphis power wire with 150a fuse at batt

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[kr15 5,000+ posts]

no one knows about current draws?

 

[whitedragon551 5,000+ posts]

A tone will be harder on an amp than music. Thats why you set gains with a DMM and a 50Hz 0db test tone because the likely hood of music ever hitting that is slim to none.

 

[kr15 5,000+ posts]

thanks for the response. I am actually going to do some testing with the mbq amp. Im just gonna grab a bunch of 40a fuses and see how far I can push each fuse prior to blowing on both tones and music. As long as I can get a few seconds at high volume on tones, i'll probley do that..

 

[Burton6431 10+ year member]

thanks for the response. I am actually going to do some testing with the mbq amp. Im just gonna grab a bunch of 40a fuses and see how far I can push each fuse prior to blowing on both tones and music. As long as I can get a few seconds at high volume on tones, i'll probley do that..

wtf is the point of blowing fuses?

 

[chillin 10+ year member]

Im guessing the category he is trying to get metered in is limited to a 40a fuse, so if you know at the point it blows, the gainn can be turned down just a little for the comp for the most spl out of 40a

 

[RAM_Designs 5,000+ posts]

wtf is the point of blowing fuses?

Im guessing the category he is trying to get metered in is limited to a 40a fuse, so if you know at the point it blows, the gainn can be turned down just a little for the comp for the most spl out of 40a

This.

And yes OP, tones draw more current because it is a continuous sound wave at a higher peak than most anything you'll find in music. Notice how people meter higher on tones than music?

 

[kr15 5,000+ posts]

wtf is the point of blowing fuses?

as the other people stated, this is the max fuse i can run for my class. and its gonna likely blow since Im trying to run about 750rms on it. It is irrelevent that it blows as long as it gives me a solid burp prior to this

And yes OP, tones draw more current because it is a continuous sound wave at a higher peak than most anything you'll find in music. Notice how people meter higher on tones than music?

i thought this was the case, but wanted to confirm it.

That said, I guess if the fuse can hold for a few seconds, I guess the MBQ on tones is the way to go. Still gonna blow up some fuses first tho. I had no problem burping my Treo amp on tones at 40a, even while ran under impedence

 

[SpeedEuphoria 10+ year member]

If you going by fusing you need an amp that has power at 4ohm. Most class D amps are most efficient at 4ohm or higher. The specs posted about efficiency are most all at 4ohm where they can be up to 85% or so, at 2ohm its like 76-78% and 1 ohm like 72-74%, Ofcourse all different by manufacturers but they all have noticeable higher at 4ohm.

The MB quart is supposed to be kinda efficient and the DTR soundstreams also from what I've seen. I'm sure there are many others, I only look at cheap stuff though

 

[kr15 5,000+ posts]

If you going by fusing you need an amp that has power at 4ohm. Most class D amps are most efficient at 4ohm or higher. The specs posted about efficiency are most all at 4ohm where they can be up to 85% or so, at 2ohm its like 76-78% and 1 ohm like 72-74%, Ofcourse all different by manufacturers but they all have noticeable higher at 4ohm.

Im not really going by fusing tho as I am underfusing it anyways. I know what your saying about maximizing efficiency, but even if I had a 4ohm load, 375rms is not gonna win my class. I'll take my chances underfusing and hoping for something on the 750rms side. Many people at comps are underfusing just to stay in lower classes. For the most part, it works as long as they get a burp

 

[SpeedEuphoria 10+ year member]

Yes you are going by fusing, 40amps. Speaking of this do they give you each the same 40amp fuse?? as you can get some that will take much more for a short burp

I'm just saying your going to get more power through a different amp that has a solid rms at 4ohm.

If you can get the true 750rms for a burp on your current amp, which I'm not sure that you will. If you buy an amp that does 1000rms at 4ohms you'll likely get 1000rms before popping the fuse and will likely win some comps(if you know how to make a good spl box)

 

[kr15 5,000+ posts]

No, you supply your own fuse. And some take more current to blow...I cannot get a 4ohm load. I have a dvc4, which with 40a is essentially the most cone area you can have in my class (0-550) With 40a you can run either 2 8s or 1 10 or 12. One 12 has the most cone area of those options. For me to buy an amp that is strong enough at 8ohms would be rediculous to me as I am not a professional competitor...So with my 12, my best shot is whatever burp I get on a 40a amp fuse.

 

[SpeedEuphoria 10+ year member]

gotcha, yup use what you got and try a varity of fuses/type to find the one that blows the slowest

The box is going to make the biggest difference. If you were a serious competitor squeezing some extra watts at 4ohm would help

Good luck and post back on your score and how you do.

If you were in MI I'd let you borrow my DTR 2200D and a 12, to see what you can get at 4ohm

 

[RAM_Designs 5,000+ posts]

Get twenty 2amp agu fuses and build a long fuse block for them. //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif

 

[SpeedEuphoria 10+ year member]

there ya go