General SPL General discussion of Sound Pressure Level topics.

dummy load?

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Old 07-12-2006, 10:27 PM
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dummy load?

My question is just that,........I have 2 15's, dual 6ohm coils, I have them parrelled all the way to come up with 1.34 ohms, so is ther any capacitor or resistor or anything that I can use to submit a dummy load to my amp, and still be able to stay within the rules of db drag and usaci, and has any 1 tried that before, and would it stand up to a burp!
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Old 07-12-2006, 11:21 PM
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what are you trying to do ???

paralleling a resistor will only waste power... if you want to reduce the load the amp sees while putting the additional power into the subs (where it is usefull) then you need to use a transformer....

Last edited by Haunz; 07-12-2006 at 11:27 PM.
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Old 07-13-2006, 12:25 AM
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any idea what kind and rating of transformer to use, and will it affect any of the rules?
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Old 07-13-2006, 12:56 AM
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Not to sound rude, but that's a waste of time.

The resistor will absorb the extra power, and a transformer (of which only a few have been marketed) can usually only hold about 1000 wrms, and is fairly inefficient too.

Best route is to match the subs to the amps.
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Old 07-13-2006, 10:32 AM
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for example; say your amp is 1ohm stable for normal use, and .33ohm stable before the protection circuit will kick on.... if you are at 1.3 ohms now a 1:4 transformer would make the amp see around .33 ohms... match the VA of the transformer to at least the amount of power your amp can deliver... (if its a 1500watt amp I would probably go with a 2000va transformer)

but, get ready to spend some cash on something that size... if you can't find one online your local electical shop can probably wind you one.... other then that you might be able to pull something suitable out of an old microwave... (but a word of caution that you could end up dead playing around with a charged psu...)

for most ppl newbs advice is good, better to match amps and subs to begin with...

Last edited by Haunz; 07-13-2006 at 10:34 AM.
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