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Old 5th June 2012, 03:27 PM   #1
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Default Can I wire speakers like this?

Can i wire a set of speakers like this? If so, will I get 8 ohms?

I've built a cabinet for the two 8 ohm speakers (4ohms), and want to have the last one as an external cabinet.
The amp does 4-8 ohms.

Other options?

Click the image to open in full size.

Tommi

Last edited by Tommiduck; 5th June 2012 at 03:43 PM. Reason: more info
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Old 5th June 2012, 04:44 PM   #2
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Are the speakers identical? If not, it is unsure to do this connection because impedances varies with frequency and acoustical load, then the result is uncertain.
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Old 5th June 2012, 06:35 PM   #3
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The 8 ohms are celestion 10" 100w bass. The third one is 12" and have unknown specifications. I ripped it off some old el-organ.
Can I do it some other way to get an 8 ohms load?
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Old 5th June 2012, 06:39 PM   #4
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What are you trying to do?
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Old 5th June 2012, 06:50 PM   #5
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Just trying to get more sound.
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Old 5th June 2012, 06:57 PM   #6
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Adding speakers not always increments the audio output. In fact, the power from the amp is distributed over speakers in directly ratio of their impedances, but if they improperly phased, they substract the sound, and be sure that the 4 ohm is capable of carrying the entire current, then it will blown.

And, in addition, in the case the speakers are properly phased, in some positions of audition, because of constructive/destructive interference between sound sources, sound cancels.
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Old 5th June 2012, 06:57 PM   #7
IG81 is offline IG81  Canada
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Such as shown above, you would get a "nominal" 8ohm load. Having two identical drivers in parallel is OK. But sticking that pair in series with a different, outboard driver, that does not sound like a good idea.

Is the point to get more bass? Get an inexpensive plate amp for this 4ohm 12".

IG
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Old 5th June 2012, 07:15 PM   #8
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Thanks.

The point with the 4 ohm 12" was to cover more high mids. It's got a pretty small magnet, nice sound.
But I'm not gonna it then.
I'll make another amplifier.
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Old 5th June 2012, 07:34 PM   #9
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by Tommiduck View Post
Thanks.

The point with the 4 ohm 12" was to cover more high mids. It's got a pretty small magnet, nice sound.
But I'm not gonna it then.
I'll make another amplifier.
It rather sounds like you're talking musical instrument ( i.e. guitar?) "amp" with built-in speaker(s), in which case the "full range" forum might not elicit the most cogent replies - if you haven't done so already, try the Live Sound sections
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Old 5th June 2012, 07:38 PM   #10
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Quote:
Originally Posted by chrisb View Post
It rather sounds like you're talking musical instrument ( i.e. guitar?) "amp" with built-in speaker(s), in which case the "full range" forum might not elicit the most cogent replies - if you haven't done so already, try the Live Sound sections
That's right. Sorry. It's a bass amp project.
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