tricking amp with speaker’s impedance

First it wouldn't increase power to the sub.  Second, even if it did it would at most double the power output of the amplifer and give you a 3db increase in SPL.  3db is not a lot.  Third, the amplifier would run strained and more distortion would be greater.  Again though, it doesn't work this way - as DYOhn just said, you can't do it.  The quote below should show you why. 

Don't be so hung up with power, you don't need to match rms speaker ratings for the system to be loud and sound good.  If you're into SPL and you want every little db out of the system then, sorry to say, you simply need to buy another amplifier.  If you listen to your music at normal levels, you should be just fine.

See this page:  https://www.bcae1.com/resistrs.htm from https://www.bcae1.com/

 "Using Resistors to Increase an Amplifier's Power Output

As we found earlier on this page, a resistor can be used to dissipate power. Some people believe that they will have an increase in system SPL if they reduce the amplifier load's impedance with resistors. The fact is, the SPL will likely be reduced. Just because the amplifier is producing more power, it does NOT mean the SPL will increase. The reason? The extra power is dissipated in the form of heat and produces no audio. The reason that the SPL will likely drop is because the amplifier's internal power supply will lose some rail voltage with the lower impedance load (the loss may not be significant on amps with highly regulated power supplies). When the rail voltage drops, the output power to the speaker drops. Even if you have an amplifier with a regulated power supply and the power to the speakers doesn't fall, the amplifier will draw more current and run hotter.

Using a transformer to balance a load on an amplifier is common, such as in 70-volt professional sound systems.  The falacy of the example given in the page you referenced is a transformer that doubles the voltage also cuts the current in half.  So, with the same input voltage and current (what your amp can produce) using a transformer to double the voltage will cut the current in half so you end up with the SAME net power.  You cannot create energy from nothing.  10 watts in will create 10 watts out, just at a different voltage and current level.  (Actually, due to magnetic inertia, hysteresis losses and heat, the power output will always be slightly LESS than the total power input.)

You all dont mess aroudn with your answers. Thanks for clarifing everything. Did anyone get a chance to read about the device I was asking about the made an amp run at a lower ohm load to supply a speaker with more power? Does it simply not exist, or even if it did it is imposible to acheive more power without loseing it the gained power in the process? (new power becomes heat). Thanks again!

 it just be easier and less of a headache to just sell what you have and go buy what u are looking for? just make sure u match your amp and subs correctly this time if you want max output

its stupid to try and 'trick' the amp, it actually pointless....

quick4321 wrote:

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Thats what I thought, but I swear I rememer this shop owner telling me about a device he could order for me that would lower the OHM load of the amp. (Really dosent matter anymore since I dont run High current amps anymore) There was nothing better than pounding 3 10" DVC subs and being rated at 25wx2. :)

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Hey, I'll be happy to sell you a whole box of this stuff.  It's called "Magiconium" and only costs $199!  Send me your Visa card number and I'll fix you right up.  :)

There are lots of actual devices that will "lower the ohm load on an amp" and produce meaningful sound in your car.  They're called loudspeakers.