Radio speakers in a "C"?

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Martin Benade
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Re: Radio speakers in a "C"?

#61 Post by Martin Benade »

Usually you can just make sure they are both wired alike, there’s not actually a + or - as it’s ac.
Bass response is the main thing that sounds weaker if they are out of synch. At mid and higher frequencies you’d hardly know the difference.
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Wes Bender
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Re: Radio speakers in a "C"?

#62 Post by Wes Bender »

You're correct Martin. If one speaker is moving outward with a sound wave and the other speaker is moving in with the same wave, the resulting sound will be flat. Correct polarity will prevent that by making sure both speakers are in sync. I think we are both saying the same thing. Perhaps we are both also in correct polarization.
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Re: Radio speakers in a "C"?

#63 Post by Alan Klingen 2 »

Pioneer made a great 7 inch speaker that I thought had good range and power handling charistics. Alan The Stable. It was their TS Series of speakers. Alan The Stable.

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Martin Benade
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Re: Radio speakers in a "C"?

#64 Post by Martin Benade »

But that would be a tight fit in the roughly 5” speaker chamber of a C.
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Mike Wilson
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Re: Radio speakers in a "C"?

#65 Post by Mike Wilson »

7 inch would be for the football and racetrack speakers, right?

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Martin Benade
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Re: Radio speakers in a "C"?

#66 Post by Martin Benade »

Then it would have two dimensions.
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Eric McKinley
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Re: Radio speakers in a "C"?

#67 Post by Eric McKinley »

Al good information, very appreciated.

I managed to get the cables addressed, they were split and soldered correctly as per the diagram.

The speakers as I have mentioned are 4 OHM, the original speakers are 8 OHM, I did consider buying original speakers but went with a set from Woodys, Charles at Woodys is happy that these will work perfectly, however opinions differ slightly with regards to this, Ingo from vintage blau isn't comfortable connecting anything outside of the 8 OHM range to original radios.
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Martin Benade
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Re: Radio speakers in a "C"?

#68 Post by Martin Benade »

With 4 ohm speakers putting them in series would have been a better option.
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Eric McKinley
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Re: Radio speakers in a "C"?

#69 Post by Eric McKinley »

Martin,

Can you explain what you mean by "putting them in series"

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Martin Benade
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Re: Radio speakers in a "C"?

#70 Post by Martin Benade »

Resplice it so the electricity flows from one connector pin through one speaker, and then the other, and finally back into the second plug pin. Right now they are said to be wired in parallel, and due to the behavior of Ohms Law it results in 2 ohms. The radio is set up to like two 8 ohm speakers in parallel which gives it a 4 ohm load. The radio’s output transformer has connections to match only the factory’s choices.
I hope my explanation didn’t merely confuse matters, sometimes that’s how well I can explain things.
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Eric McKinley
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Re: Radio speakers in a "C"?

#71 Post by Eric McKinley »

I cut through the carpet on either side in line with the metal surround of the recess for the speaker today.

I lined the hole with dyna-mat and then lined on top of this with deadening felt which is rubber backed.

I have taken the grills off the 5 inch speakers that Woodys supplied, when I source a set of sorta round speaker grills I will install them. Removing these was a bit difficult, they are stuck on well.

I also fitted the radio, it’s a tight fit under there.
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Mike Wilson
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Re: Radio speakers in a "C"?

#72 Post by Mike Wilson »

Nice work, Eric!

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Eric McKinley
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Re: Radio speakers in a "C"?

#73 Post by Eric McKinley »

I am close to installing the speakers in the 356c.
I managed to find all the original parts I need, I have original speakers which I will re-cone.
The part I am missing is the grill frame, not the chrome outer frame for the sorta round speakers but the innermost part, number 13 in the diagram.
Would anyone know if these are reproduced or know of a source for a pair of them.
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Bill Lawless
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Re: Radio speakers in a "C"?

#74 Post by Bill Lawless »

EricMcKinley wrote: Sat Oct 07, 2023 8:26 am Martin,

Can you explain what you mean by "putting them in series"
A picture is worth 1000's words as they say:
Screen Shot 2023-12-28 at 3.07.06 PM.png
 Thanks,
Bill
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Eric McKinley
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Re: Radio speakers in a "C"?

#75 Post by Eric McKinley »

Thanks Bill, that explains it very well.

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