To put your speaker ohm rating in perspective....
I made several home made speakers the last week with varying coils of wire (Some very short) and some long... the most basic was about 20 coils of 36 gauge wire around a soda cap. I plugged that into my Outlaw RR2150 and held it over a very large magnet. It worked. what is the resistance of the coil? like 0.01 Ohms. Over the magnet? Like 0.1 ohms. Did it work? Yes. Did the wire melt the tape around it? Sure, 36 gauge wire gets very hot very quickly.
More importantly -- the amp was fine. Resistance of your speakers vary a ton. As long as your sound is OK that means the current draw isn't being maxed out and your amp will be fine, even if you plug in a coat hanger. Just take it easy on the volume till you have tried things with broad dynamics.
More importantly -- the amp was fine. Resistance of your speakers vary a ton. As long as your sound is OK that means the current draw isn't being maxed out and your amp will be fine, even if you plug in a coat hanger. Just take it easy on the volume till you have tried things with broad dynamics.
My Iron Man training/charity blog.
HT:
32" Sharp LCD. H/K dpr 1001 to Outlaw Audio 7900 to Polk LSi + Paradigm Studio center. Hsu DualDrive ULS-15. PS3/Wii. Outlaw 7900.
HT:
32" Sharp LCD. H/K dpr 1001 to Outlaw Audio 7900 to Polk LSi + Paradigm Studio center. Hsu DualDrive ULS-15. PS3/Wii. Outlaw 7900.
Post edited by lanion on
Comments
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You made a choke (coil); the inductance/AC impedance will be more of a factor than its DC resistance in terms of the way it loads an amplifier output.
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for sure, but the point is not to get so worked up about the nominal rating on your speaker.My Iron Man training/charity blog.
HT:
32" Sharp LCD. H/K dpr 1001 to Outlaw Audio 7900 to Polk LSi + Paradigm Studio center. Hsu DualDrive ULS-15. PS3/Wii. Outlaw 7900. -
The thing is though is you are measuring resistance. The impedance is what you need to be looking for. The resistance of a speaker is usually lower than the impedance. The DC resistance means nothing to the AC signal that is coming in.
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While I personally oft use speaker impedance as an analog to wire resistance (impedance) for practical day to day stuff, as dudeinaroom states, AC currents complicates it a great bit. Within speakers, the specific frequency being reproduced by the speaker will vary its impedance quite a bit.
For example, some frequencies will drive a nominal 8 ohm speaker down to under four ohms. For other speakers, less. If, by chance, the ohm rating in any speaker is reduced to 0 ohms, you have a dead end short and the required current to be delivered goes to infinity.
Many bad things happen to power delivery equipment when there are dead shorts. Be it your amp or the local power station. At a minimum, fuses or breakers blow as they are all rated upon current delivery capability. If they do not work to expectation, then something else within the overall circuit becomes the "fuse...." I do not want said fuse in the circuit to be a circuit within my amp.
