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Post by johnnyquest on Nov 18, 2023 14:09:46 GMT
I am new at owning a jukebox. Currently i own a Wurlitzer 2710 jukebox & my speakers are shot. One of the 12" cone is ripped & the tweeter doesn't work. According to my manual the 12" are 16 ohm were the tweeter is 4 ohm with some kind of resistor soldered on to it. Can i replace all 4 with the same ohms? Like just get all 8ohm speakers?
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Post by jukenorman on Nov 19, 2023 14:51:33 GMT
The speaker set up used on these Wurlitzers could probably be described as slightly odd. Although a stereo amplifier is used, the speakers in the cabinet are a 12" low frequency unit, a 12" mid range unit and a 3.5" tweeter. One of the 12" speakers is 16 ohm and the other is 8 ohm. I think it's fair to say that Wurlitzer accepted that with the cabinet speakers so close together, there was little stereo effect - stereo could only really be achieved with external speakers.
Is your ripped cone 12" speaker repairable? Retaining the original speakers (or two of them at least) would maintain the sound close to how it was intended. But yes, you could use all 8 ohm speakers if you wished, the trick then is to get the overall sound balance correct. Incidentally the "some kind of resistor" is a capacitor which prevents low frequencies being fed to the tweeter.
Norman.
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Post by johnnyquest on Nov 20, 2023 12:34:21 GMT
Thank YOU FOR YOUR ANSWER. I will look for some 12" 8ohm speakers & also the little speaker. The speaker is not repairable.I did see some Jensen 12" speakers ranging from 25watts up to 100 watts.
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Post by jukenorman on Nov 21, 2023 9:43:08 GMT
The 25W Jensens would probably be a good shout. Whatever you do, let us know how successful it turned out.
Norman.
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Post by johnnyquest on Nov 29, 2023 23:07:26 GMT
Well i did get some 12" 8ohm speakers along with 3.5" 8ohm speaker. Sounds OK. Had to increase the bass more but sounds good. I was getting feedback thru my speakers from the amp.
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Post by johnnyquest on Jan 31, 2024 18:43:11 GMT
So i have an amp coming for my Wurlitzer 2710 jukebox. I am trying to get sound system back to original also. My service manual shows that i should have a 12" 8 ohm speaker, 12" 16 ohm speaker & a 3.5" 4 ohm speaker with a capacitor on it. Now in the book it gives a part # 74147. Lists this as a 2 MFD, non polarized. What should i be looking for to replace this? Also is the + & - both soldered to this & lead goes to amp? Doesn't really show how this is connected.
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Post by jukenorman on Feb 1, 2024 10:13:58 GMT
2.2uF would be the closest you would probably get although you could use two 1uF in parallel, look for crossover capacitors. The capacitor is simply in series with the tweeter (3.5"). The only sure fire way you will get the sound back to original is to use original speakers! There is no electrical reason why one 12" speaker should be 8 ohms and the other 16 ohms - this would have been done by Wurlitzer purely to get the overall sound balance correct and would be a function of the efficiency of each speaker.
Norman.
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Post by johnnyquest on Feb 1, 2024 15:38:06 GMT
Thanks again. How do you hookup that crossover capacitor to the speaker? Speaker has + and -, so do you solder it to both or one or the other.
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Post by jukenorman on Feb 1, 2024 16:41:37 GMT
Put the capacitor between the positive wire to the 3.5" speaker and the positive terminal of the speaker. It would be better if you used crimp connectors on the loudspeaker terminals; that gives you greater flexibility if you subsequently have to make any changes.
Norman.
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Post by johnnyquest on Feb 2, 2024 1:11:55 GMT
OK, thank you again. Will let you know how this turns out.
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