Just be certain that the speakers you're using are at least a nominal 8 ohms each. Hooking two per channel will lower the impedance the receiver sees to 4 ohms, and you don't want to go any lower. Other than that- you should be fine.
amplifier needs
I am looking for an amp that will power 2 small outdoor speakers to a screened porch on one side of my home and also 2 small speakers in the pool area which is adjacent. The cable run is probably 25 feet in both directions. I've got a really nice Sansui G9000 at 160W that is a spare amp but I don't want to mess it up if the load would be beyond it's capability. Any suggestions you more knowledgeable guys might give me would be appreciated
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Be aware, though, that wiring them in series, while making life easier for the amplifier, will degrade the sound quality, especially if the two sets of speakers are not identical. If the two sets of speakers have different impedance vs. frequency curves, the frequency response of each pair of speakers will be altered by the impedance vs. frequency curve of the other speaker. And even if the two sets are identical, damping factor (affecting the bass) goes down the tubes because the source impedance driving each speaker becomes the amplifier output impedance plus the impedance of the other speaker, rather than just the (very low) amplifier output impedance. None of that may matter too much, though, if the speakers don't have much bass response anyway, and if sound quality is non-critical in this application. Regards, -- Al |
Hi Markus, Let us know the make and model of the speakers (and any technical parameters that you can readily provide, e.g., rated impedance, efficiency, power handling, etc.) and we could make better informed recommendations. I did find these specs on the G-9000DB (don't know what the "DB" means, but I would suspect that it doesn't mean anything significant as far as power output and load impedance are concerned). They indicate 160W into either 4 or 8 ohms. But of course many "8 ohm" speakers are really less than that at many frequencies, which would mean that two of them in parallel would drop below 4 ohms, as Rodman pointed out. I would feel comfortable if the combined impedance dropped SLIGHTLY below 4 ohms at some frequencies, given that the receiver is rated for 4 ohm operation. But I would not feel comfortable, for example, if the speakers were nominally rated at 6 ohms, meaning that their parallel combination would be nominally 3 ohms, and would drop down lower than that at some frequencies. http://www.sansui.us/SM-G9000DB.htm Regards, -- Al |
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