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Post by bjwizzer on Feb 22, 2019 1:47:38 GMT
Hello Addicts!
I would like to know the "ohm" value of a Seeburg SPS160 horn speaker.
I DO have a parts book which only list it as "horn" but not not showing a "ohm" value.
I DO have a Installation and Service manual but unable to find the information in them.
I sure if I missed seeing the information "Someone" will let me know!
Thank you in advance for your help.
BJ
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Post by dalton on Feb 22, 2019 2:25:30 GMT
Someone will correct me if I'm wrong, but I believe the horns are 16 ohm from the LS2 up.
Dalton
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Post by bjwizzer on Feb 22, 2019 3:22:49 GMT
Dalton,
Thanks for your response, that was my guess, I metered the horn and got a little over 13 ohms.
But I decided to try to see some actual documentation to make sure.
BJ
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Post by Ron Rich on Feb 22, 2019 3:41:11 GMT
BJ,
There aren't no such thing as "Ohm value" for a speaker (coil). Coils don't got no Ohms--they gotz "impedance values", so no Ohm meter will ever read them as what the maker says they are--that iz, unless you gotz one of them fancy "Weatstone" meters ! (yep-- horns on all 'burgs were 16 ohm) (BTW--I believe it's shown on the schematic) Ron Rich
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Post by bjwizzer on Feb 22, 2019 17:19:55 GMT
Once again I am in error of using the "wrong" nomenclature, you're right I should have used the term "impedance"
instead of "ohm value". You are right, most of us don't have a "Wheatstone" meter, so what are we left with?
The lowly VOM meter, ugh. So when you use your lowly VOM to measure the "impedance" of the Seeburg horn" what "value" do we read? VAC? VDC? AMPs? NO! Most of us click to OHMs!
Ron, you need to lighten up, most of us haven't done jukebox repair for a living and your expectations for us to be as knowledgeable as you are too high. If we all knew what you know, there would be no one on this database but you.
BJ
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Post by Ron Rich on Feb 22, 2019 18:30:32 GMT
BJ--I was ribbin' ya (99 % of the time I am doing such !)--I don't know how to be any "lighter" then that- Also, I did not fully understand your question ! Yes--"Ohms" is the only other way to get any idea as to the impeadence with an Ohm meter. A "16 Ohm" speaker, will measure between 10- 14 Ohms, depending on the type ( Analog/Digital) and quality of your meter. A 5 Ohm will read 3.5 to 4.5 + --- Ron Rich
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Post by robnyc on Feb 22, 2019 21:20:28 GMT
"Ohm value" as a term is as good as impedance when talking about speakers. However you describe it the value is frequency-dependent.
If you want a look "under the hood" at the aspect search "speaker impedance" and look for charts. You'll see the the value on the speaker label actually varies widely depending on frequency, enclosure (if any) free-air resonance and power input. That last one is often overlooked and unmentioned in spec's, but voice coil heating and mechanical limits of cone travel do affect the impedance reflected on the amp.
RobNYC
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Post by bjwizzer on Feb 23, 2019 2:16:56 GMT
RobNYC,
I think you kinda bailed me out, Thank you! But then you got technical and the techno waters went over my head.
Question? with all the knowledge you and Ron have, why isn't there a jukebox on the moon yet?
OH, I forgot, no outlets to plug into.....
BJ
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