Series/parallel question

[wish i was]

I have a handful of speakers that I took out of a 1960's hifi, plenty of lumber, and time on my hands this weekend.

I also have a 5W micro head and I'd like to knock together a down-and-dirty cab.
I get that my design will almost certainly be sub-optimal, but this is just a learning project.

I have a total of 6 speakers ranging from 5-8". I will wire them with 2 sets of 3; 3 serial, then wiring the two sets in parallel.

Here's my question: 5 out of 6 of the speakers measure out around 8 Ohms. The 6th is almost exactly 16 Ohms. They were wired groups of 3 in series in the hi-fi originally.

Everything I've read on the internet says the impedance of all of the speakers wired in series should match. The original manufacturer didn't care... should I care?

My gut tells me that the only effect will be that one of the circuits will be slightly louder than the other, but a) i don't care, and b) this whole thing will be smaller than a vertical 2x12 so it wouldn't be noticeable anyway.

 

[kartiste]

I have a handful of speakers that I took out of a 1960's hifi, plenty of lumber, and time on my hands this weekend.

I also have a 5W micro head and I'd like to knock together a down-and-dirty cab.
I get that my design will almost certainly be sub-optimal, but this is just a learning project.

I have a total of 6 speakers ranging from 5-8". I will wire them with 2 sets of 3; 3 serial, then wiring the two sets in parallel.

Here's my question: 5 out of 6 of the speakers measure out around 8 Ohms. The 6th is almost exactly 16 Ohms. They were wired groups of 3 in series in the hi-fi originally.

Everything I've read on the internet says the impedance of all of the speakers wired in series should match. The original manufacturer didn't care... should I care?

My gut tells me that the only effect will be that one of the circuits will be slightly louder than the other, but a) i don't care, and b) this whole thing will be smaller than a vertical 2x12 so it wouldn't be noticeable anyway.

Put two 8ohm in series, then parallel that with the 16ohm. Now you have 8ohms. Put that in series with another 8. Now you have 16ohms. Put the remaining 8ohmers in series, then parallel that with the other gaggle. Now you have an 8ohm load for the microamp.

 

[Downunderwonder]

Three parallel series pairs would be a more likely impedance match to a musical instrument amp, 16 16 and 24.comes to a little under 8 ohm total.

 

[DigitalMan]

The 16 ohm speaker will be a little bit quieter. You won't notice when driving it with 5W.

Given that you don't care, you are immune from disappointment. As long as it doesn't throw a circuit breaker or shock you when you turn it on I think you will have experienced as much success as possible with the materials in play.