im thinking you could raise the impedance bassmanmike I raised the question could you go the other way I think the answer is yes with mods even in my question....no ofense baseball but just because no ones doing it doesnt mean it cant be done remember someone has to be first....the solution lies in solving the problems preventing you from doing something one at a time then you become closer to the final solution....remember thomas edison he failed many times with scoffers around him but ultimately succeded
Im no longer a I CAN'T person and I consider NO idea is a stupid one...not that im saying anyone is saying the idea is stupid......just a piece of scrpiture to consider "All things are possible with God." thats Truth people.. The final reality Praise God!
It can be done. The problem is, you won't find a resistor that can handle the power. If you look at 80w resistor, it is quite thick and expensive. Not very practical. You'd be better off getting an amp that meets your requirement (probably cheaper too).
It would take more than the average resistor to handle the power from a subwoofer. If you had a nominal 3 ohm load (speaker) and a 1 ohm resistor, with a voltage output of 40V, it will equal 400watts. 40V divided by 4 ohms is going to give a 10A current draw. The resistor will drop 10V, have 10A, and total power would be 100W. Not a typical resistor, but one with a heat sink could take it. That's assuming your amp is putting out 400W, though. Of course, with a dual 1.5 ohm load you're usually talking about a 13W7, and 1000W is going to take one heck of a resistor. Another problem is that if you add a series resistor, it will cut your damping down. Not really by a lot with a 1 ohm resistor, but it will cut it down since the speaker sees the resistor as source impedance.
sean - if it could be done that easily, it would be. Impedance loads are the most typical problem with people matching subs/amps. If you could just pop a resistor in and solve your problem it would be the most common fix in car audio. It's not a novel idea. Plus, it will completely mess things up, like Jonathan said, if you start getting resistors in the circuit with different impedances.
Isaac is right, of course it can be done, physics tells you that. A speaker is simply a resistor. At school we were frying the little radioshack resistors in the labs using 4v and 2amps. Yea 8w. And they got extremely hot. Think about 1000w.
well baseball I never it was easy in terms of getting your mind around it but what you missed in jonathans example is "the inventive factor" hence the heatsink idea for one. Saying you cant and accepting it simply stops any POSSIBLE forward progress all im saying is dont say you cant say I dont know how you could achieve your goal
A heat sink isn't the only savior. You have to get a wattage resistor capable of handling that much power, and it will cost as they are very large and use components capable of handling the heat produced by the current going through the resistor. Many are aluminum cased, and the surface area is much greater than that of a more typical 5 or 15W resistor.
Well if im following you right jonathan this is a problem with a high wattage speaker but if it was of a much lower value say 100 watts for one speaker this would be much easier to do ....I guess what I should be asking is in your opinion with exsisting technology in resistors what would be the maximum amount of power one could handle then I would say how could you over come the other factors you mentioned
ok so now that i know resistors can handle large amounts of power my next logical step would be to figure out what makes up a resistor and what seperates the small capacity resistors from the large capacity ...what im pointing out for all of us here is its a step by step process of problem solving keping it within your desired cost range and type of useage
I wouldn't get to bothered about ohm loads, just because a speaker is rated at 4 ohms doesn't mean it is a constant 4 ohm load. It will vary dramatically from that figure over the typical frequency range a sub handles. Adding series resistance alters speakers Qts. Large value inductors have resistance and no-one worries about burning those out in a rush. While writing this I remembered this link.......