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Dual Speakers

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rbdamon:

I was trying to see if I could squeeze out just a little more prime mover sound out of one of my engines by installing dual speakers. I added a second iphone 4 speaker and it seemed to crackle a little bit and not give much of any more sound per say. Turning down the volume did not seem to correct it. I tried wires both ways just to make sure and the results were the same. Am I missing something or will these speakers not work in pairs?

KPack:
It sounds like the second speaker may be bad.  It's not common but I have seen it happen a few times, particularly with these cheaper speakers.  My guess is that the speakers you have are not Apple OEM product, but rather a third party brand that fits Apple products, and may or may not be up to spec or quality control.  I've had a couple sugar cube speakers that were obviously of lower quality than the others that came in the same batch.

Those (or any identical) speakers should work just fine in pairs.  I tend to run mine in series rather than parallel because I'm not trying to blow eardrums.  Plus it is gentler on the speaker.

-Kevin

rbdamon:

Thanks Kevin

The speakers came from Bill at PDC. I was wiring them in parallel and I had tried a different second speaker with the same result. A single speaker sounds fine. I will try messing with it again over the weekend. Perhaps I'll wire them in series and see what happens as well.

Ben

Josephunh:
If you are trying to install two speakers in an engine you should really be using a crossover circuit to drive them both.

https://en.wikipedia.org/wiki/Audio_crossover

CPRail:
Ever since Rapido put 2 speakers in the DASH 8-40CM, I've been debating how to do this, especially in my Big Alcos. One iPhone4 speaker just doesn't give enough bark!

Are there audio crossover circuits that are small enough to install in a Hood diesel and where does one acquire these?

Ian

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