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Why does there seem to be such a tremendous trend towards people pushing the limits of amplifier loads. When you start approaching 0 ohm, the short circuit protection will kick in usually clipping the signal. As a beginner amp designer and builder, I see no real point in this. The ideal would be to build amps to give out max power at 4 or 2 ohms. I find the trends in car audio seem to reflect more car and less audio. After and that ranting, my question is. Other than higher current output, increased disrtortion, protection circuits activating and voiding the warranty, why do people think running a lower load is actually good?
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Posts: 768 | From: Ottawa, On, Canada | Registered: May 2000
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Our team had the same problem (protection circuit cause problem when wiring under 2 ohms our RF bd1000.1) many other post talk about the capability of these amp to run at one ohms... we actualy wire our amp at one ohms and we need to start with low volume and gradually increase it ...
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[This message has been edited by Doctorbass (edited 07-28-2001).]
Posts: 643 | From: Quebec city | Registered: Mar 2000
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posted
It has more to do with the actual impediance of the circuit under use. For example; when you burp a system that has four 4ohm coils (wired in parallel to 1ohm) at 50hz and 50hz only, the impediance curve from the speaker/box/car combo might actually create a 2ohm or higher load on amp. So you need to find the right impediance to start with so when the system is running where it will be in the lanes, the load on the amp is what you want. Say in that example you had an amp made to run at 1ohm. Like what your saying. You would be getting (theoretically) half of its potential power output at 50hz where you need max power at 2ohm. In that same example if you wired an amp made to run at 2ohm to them you would get its full power potential. Even though it looks like your going to be pushing it harder than will be helpful.
Posts: 736 | From: Albertville MN USA | Registered: Mar 2000
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Tguy- Don't ignore the fact that the amplifier will "see" the actual DCR before the cones start moving..
Emu- It comes from having a 12v power source. Although you can step this voltage up with the proper power supply type, its much easier (and cheaper!) for companies to simply double the current handling ability by increasing the number of power devices (IE transistors in power supply and output packages), most likely because they already have thousands of thousands of extra devices lying around vs. developing and supplying a new power supply design.
I think!
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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Thanks Shadowstar. That's probably it, the low voltage, high current capabilities in a car. I still strive for SQ and not power. I mean, how often do you even use half of the amps potential, comps excluded. BTW, I just got myself an old heathkit oscope so anyone in the Ottawa, On area who needs a scope to set some gains or whatever, send me an e-mail.
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Posts: 768 | From: Ottawa, On, Canada | Registered: May 2000
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posted
I always thought that one ohm stable amps were born for competition reasons. Since IASCA classifies installs by rms power into 4 ohms, people with 2 ohm stable amps were getting away with twice the power while remaining in a lower power category. What Shadowstar said makes sense though.
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