Any way to use 4 8 Ohm and 4 16 Ohm speaker in an 8x10

74JMP

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I have an old Marshall 8x10 and had a hodgepodge of speaker in it when I got it. My Hiwatt fired 4 of the web sig series. Going though my collection of speakers I have 4 Celestions in 16 ohm and 4 in 8 ohm . Thinking it through it seems impossible
 

NotScott

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Wire the (4) 16 Ohms in parallel. That will give you a 4 ohm load.

Wire the 8s (2) in parallel and (2) in series. Then wire these two pairs in parallel. That will give you a 3.2 ohm load.

Wire the two loads in series at your jack and you will have a 7.2 ohm load, fine for an 8 ohm output.

Because of the wiring, you will create a crude Bessel array which will make the cab hotter at some spots. To alleviate this, I would put the 8s in series on the bottom row. The 8s in parallel above them. Then your 16s over that.
 
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Big John

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Another option is wire the 8 ohm quad series/parallel to give an 8 ohm total load.
Then wire the 16 ohm quad series/parallel to give a 16 ohm total load.
Now combine the 8 ohm quad with the 16 ohm quad in parallel, which gives a 5.33 ohm total load for the cab.
Set your amp to run at 4 ohms.
Then set your balls on fire and do the splits.
 

ErictheRed

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Be aware that there is no way to do it so that each speaker receives an equal portion of the amp's output power, so some will be working harder than others.
 

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