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Post by LaserMark on Dec 29, 2021 0:22:48 GMT -5
So I've noticed that the Airmotiv C1+, C2+, and A1 are all listed as 4 ohm speakers. But the surround E2+ is listed as an 8 ohm speaker.
Is this a misprint... or is there something different in the architecture of the E2+ that gives it an 8 ohm rating?
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KeithL
Administrator 
Posts: 10,261
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Post by KeithL on Dec 29, 2021 12:00:11 GMT -5
It's not a misprint...
The overall impedance of the speaker is determined by the impedances of the various drivers, the way they're connected together, and the topology of the crossover. (Individual drivers may in fact be available in both 4 Ohm and 8 Ohm versions... and there may or may not be reasons why one or the other will work better in a given application.)
The bottom line is that, since modern amplifiers can drive speakers of either impedance just fine, "that's just how they turned out".
It's also worth mentioning that ALL speaker impedance ratings are really more of an average or an approximation than a precise value. In fact the impedance of most speakers varies considerably over the audio frequency range. (All the rating really means is that "an amplifier rated to drive a 4 Ohm speaker should find it a comfortable load to drive".)
So I've noticed that the Airmotiv C1+, C2+, and A1 are all listed as 4 ohm speakers. But the surround E2+ is listed as an 8 ohm speaker. Is this a misprint... or is there something different in the architecture of the E2+ that gives it an 8 ohm rating? |
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Post by LaserMark on Jan 3, 2022 2:14:31 GMT -5
It's not a misprint...
The overall impedance of the speaker is determined by the impedances of the various drivers, the way they're connected together, and the topology of the crossover. Thank you for the good clarification, Keith. It was interesting to see speakers in the same suite have ohm variations but your explanation makes sense. I have some pretty solid amps to drive the room (with Martin Logans ELS) so I am sure these surrounds are going to sound great. |
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