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Old 05-25-2011, 12:33 AM   #1
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Default Ohm question about speakers

I would like to power three speakers off of one channel, and I'd like to do two speakers in parallel and those in series with the third speaker. Would I get 3 ohms out of this? Is that the best way to attach 3 speakers to one 2 or 4 ohm channel? The amp in question is a 4-ch Infinity with 110W RMS per channel.
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Old 05-25-2011, 05:17 PM   #2
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so 3 single voicecoil 4 ohm speakers?
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Old 05-25-2011, 06:43 PM   #3
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Yep, all three probably even the same brand.
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Old 05-25-2011, 09:45 PM   #4
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that works out to six ohms, if your amp is 1 ohm stable you can hook them in parallel thats 1.3 ohms
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Old 05-26-2011, 02:49 PM   #5
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yup, wiring two in paralell will be 2 ohm, then add another 4 ohm speaker will bring it to 6 ohms
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Old 05-26-2011, 05:29 PM   #6
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Thanks a lot! But then, four speakers off of one channel should give me 4 ohms if two parallel pairs are in series, right? Is this too many speakers?
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Old 05-26-2011, 06:52 PM   #7
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yes u will be at 4 ohms if wiring each pair in parallel, no such thing as to many speakers. as long as there is enough power going to each one, and the ohms match up. Technacaly u can run 100 subs off of one channel as long as the fina load is above the minimum impedancy the amp will run at.

looks like what ur gonna have to worry about is not enough power. remember everytime u double the amount of speakers, the power gets cut in half at the same impedance. so if the amp is [email protected] 4 ohms and u have 2 speakers hooked up to the amp with a final load of 4 ohms, each speaker is only getting 50rms, 4 speakers= 25rms each, ect
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Old 05-27-2011, 04:49 AM   #8
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That makes sense. I figured so, but thanks for pointing it out. Looks like it'* smooth sailing from here on out, but I'll let you know if more questions come up. Thanks!
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Old 07-08-2011, 01:07 AM   #9
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To the OP:

Wiring two 4 ohm speakers in parallel and then in series to a third is akin to wiring two different speakers of different impedances together, which is a car audio cardinal sin! Please don't do that. You should never wire multiple drivers in series to each other, regardless of the impedance, the fact that you'd be wiring technically 2 drives together with 2 different impedance'* makes it even worse!
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Old 07-10-2011, 12:45 AM   #10
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Thanks, Monte! I appreciate the input. Is there a way I can get around this sin of sorts, like by setting up a crossover box?
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