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Speaker parallel connected and watts to each sp
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JAH View Drop Down
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    Posted: 08 November 2017 at 11:05pm
If i have 2 pairs of 4ohm speakers and parallel connect them to create 2 ohm load and connect to 800 watt per channel 2 ohm amp .

Would each of the four speakers get the full 800 watts?

Or as the impedance has dropped when parallel connecting two 4 ohm speakers together to create 2ohm load.

Would this mean the power to each of the speakers has also dropped so each speaker would receive 400 watts each to make up the 800 watts per channel. There are four speakers in total

Which is correct?
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LunchieTey View Drop Down
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Points: 934 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LunchieTey Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2017 at 11:30pm
Divide the amplifier power at 2ohms(or whatever load you have the speakers wired up as) by the number of speakers connected.

Ie 4 8 ohm speakers wired in parallel to 2 ohms on ONE channel providing 800w would each recieve 200w.

This is only true however if all connected speakers present the same load. It gets more complicated if the impedences are different.

In your case you have 4 ohm speakers (ill assume they are all identical) wired in parallel for 2 ohms. I also assume the 800w amp is total power of the amp at 2 ohms? So that would mean two 4 ohm speakers per amp channel. If there are 2 speakers, divide the power in half per speaker (800/2 channels = 400w per channel, 400w per channel divided by 2 again means 200w per speaker)
Amps dont magically add extra power

Edited by LunchieTey - 08 November 2017 at 11:34pm
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JAH View Drop Down
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Points: 95 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JAH Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2017 at 12:07am
How is it total output power 200 watts per speaker? Why do you divide again to get 200 watts? I dont get this? How can it be only 200 watts per speaker? 

At 200 watts per speaker this means the amplifier is loosing a lot of power somewhere. Can you explain this?

Should it not be 400 watts per speaker? This is what i thought each of the speakers would recieve. Is a 800 watt per channel 2 channel 1600 watt amplifier.

If each of the 4 speakers gets 400 watts this makes up the 1600 watts at 2 ohms. 

Does it not?


Edited by JAH - 09 November 2017 at 12:28am
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cravings View Drop Down
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Points: 7442 		Post Options Post Options   Thanks (0) Thanks(0)   Quote cravings Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2017 at 12:27am
you said the amp does 800w per channel at 2 ohms. so that 800w would be spread equally across the 4 drivers in the 2 speaker arrangement you described.
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JAH View Drop Down
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Points: 95 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JAH Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2017 at 12:29am
yes i see what you mean as in total there are 8 driver woofers. The figure you gave was per driver woofer as there are 2 woofers in each cabinet. Each woofer is 350 watts. 

The speaker box is 700 watts RMS so there would be total 400 watts RMS going from the amplifier to 700 watt speaker box. They would not be underpowered too much would they sound ok? 

Could the amp maybe start clipping at full volume power to drive the driver woofers as it is underpowered each driver by approximately 150 watts?

Would this set up be okay?


Edited by JAH - 09 November 2017 at 12:40am
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Conanski View Drop Down
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Points: 2543 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Conanski Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2017 at 12:47am
Originally posted by JAH JAH wrote:

Could the amp maybe start clipping at full volume power
It could but only if the operator is a complete idiot or simply doesn't care.

Originally posted by JAH JAH wrote:

Would this set up be okay?
  Should be just fine.


Edited by Conanski - 09 November 2017 at 12:48am
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AJ113 View Drop Down
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Points: 123 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AJ113 Quote  Post ReplyReply Direct Link To This Post Posted: 10 November 2017 at 7:24pm
Originally posted by JAH JAH wrote:

...The speaker box is 700 watts RMS so there would be total 400 watts RMS going from the amplifier to 700 watt speaker box...
Except that you said you have two pairs, which means four boxes. If that is the case, there will indeed be 200 watts going to each box.
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