How can I use a 4 ohm output amplifier to 4 8-Ohm speakers cabinet.

[custom_amp_30]

My computer was offline (Power supply) was gone, now fixed. I forgot how to wire my speakers so that I can use this old 4-Ohm amplifier with this cabinet.

Any suggestions will be tested and thanks in advance.

[Jazz P Bass]

The 4 ohms is the "minimum" impedance that the amp can drive.
4 ohms will also deliver the maximum rated power of the amp.
You have a cabinet with (4) 8 ohm speakers, correct?
Wire two sets of 8 ohm speakers in parallel. 4 ohms.
Wire each set in series.
8 ohms will be the result.
There is no other way to do it.

[jmaf]

Just a note: if you set it up series / parallel, the parallel pair in JPB's example will dissipate 80% of the power, the other 2 speakers only 20%. While the amp sees approximately 10ohms and that's ok for a 8 ohm output, that cabinet is no longer rated for 4 x the individual power of each speaker, because that implies identical current through each.

[g1]

JMAF, I think you misread what JPB said, common series/parallel arrangement with all spkrs. getting equal power. (2 sets in parallel with the 2 sets then wired in series).
What you described would be one pair in parallel, in series with another series pair.

[jmaf]

JMAF, I think you misread what JPB said, common series/parallel arrangement with all spkrs. getting equal power. (2 sets in parallel with the 2 sets then wired in series).
What you described would be one pair in parallel, in series with another series pair.

I did misread it, now I see. Sorry about that.

[custom_amp_30]

Thanks for the fast response!

[Chuck H]

FWIW you could always wire up a switching jack to split the four speakers into two pairs. Then the cabinet could be run mono @8ohms or in stereo (not much effect in a single cab) or two 4ohm amps could be plugged into the one cab OR... A single 4ohm amp could run a pair at it's rated load impedance.