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mcdonaldneal Samba Member
Joined: June 13, 2013 Posts: 2639 Location: Gullane, Scotland
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Posted: Wed Jan 20, 2016 7:00 am Post subject: Single, central speaker wiring. Info and question! |
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There isn't really a good forum for this, as it could apply to any older model car, but I'll hang it out there for any comments!
I've taken out the single, central dashboard speaker from our Ghia. We also have two door mounted speakers, so the radio still works. I'm going for a totally stock look, but keeping the radio.
One of the tiny wires between the right hand (green) terminal and the speaker cone was broken, so I soldered it back on to the terminal. No continuity, so I bridged the gap with some de soldering braid. It's tight to access, so the soldering is a mess, but it does now make electrical contact.
Connecting the speaker to a transistor radio, it plays music when the central terminal and the left hand terminal are connected AND when the central terminal and the right hand terminals are connected. ie white and yellow and/or white and green.
First question: why are there three terminals? I guess it is so that a stereo radio can have both left and right channels connected at the same time, or do the left and right sides do something different?
Second question:my radio is mono, so I think I can connect to either the left or the right side, but if I connect to both does it change the resistance? The speaker says 4.8 ohms on the back.
Third question: the casing has a tab at just after 3 o'clock (pic below). Is that an electrical connector or should I just ignore it?
Once I cleaned the back, I can see a little diagram which looks like left and right terminals, A and B, and a common terminal, C, in the middle.
I'm not even sure I'll put the speaker back in, but it probably makes the radio sound a bit better, I just wonder whether to connect my speaker wires to A and B, or just one of them? _________________ 1978 marino yellow Bay Dormobile camper
1969 signal orange Karmann Ghia convertible
1976 martini olive Bay Dormobile camper
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mcdonaldneal Samba Member
Joined: June 13, 2013 Posts: 2639 Location: Gullane, Scotland
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ToolBox Samba Member
Joined: January 27, 2004 Posts: 3439 Location: Detroit, where they don't jack parts off my ride in the parking lot of the 7-11
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Posted: Wed Jan 20, 2016 10:39 am Post subject: Re: Single, central speaker wiring. Info and question! |
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Center is common and the 2 outers are for use with radios of 4 or 8 ohm impedance. You use the correct 2 terminal to match it to the radio. Center and right = 8 ohm. Center and left = 4 ohm. |
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mcdonaldneal Samba Member
Joined: June 13, 2013 Posts: 2639 Location: Gullane, Scotland
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gt1953 Samba Member
Joined: May 08, 2002 Posts: 13843 Location: White Mountains Arizona
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Posted: Fri Jan 22, 2016 7:00 am Post subject: Re: Single, central speaker wiring. Info and question! |
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Measurement with your ohm meter. That eliminates the guess work.
Also make sure you connect the speaker so you drive it out. (what do you mean) Speakers need to be drivin out not in. Hear is how you make sure you connect the positive to the positive terminal. Simply take a battery aa size works fine. connect the battery to the speaker terminals just touching it the terminals. Note the what the speaker does, it move out when the positive + is connected to the correct terminal. Think I am kidding reverse the connection and see the speaker drive in. _________________ Volkswagen: We tune what we drive.
Numbers Matching VW's are getting harder to find. Source out the most Stock vehicle and keep that way. You will be glad you did.
72 type 1
72 Squareback
({59 Euro bug, 62, 63, 67, 68, 69, 73 type ones 68 & 69 type two, 68 Ghia all sold}) |
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mcdonaldneal Samba Member
Joined: June 13, 2013 Posts: 2639 Location: Gullane, Scotland
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Posted: Fri Jan 22, 2016 7:48 am Post subject: Re: Single, central speaker wiring. Info and question! |
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gt1953 wrote: |
Measurement with your ohm meter. That eliminates the guess work.
Also make sure you connect the speaker so you drive it out. (what do you mean) Speakers need to be drivin out not in. Hear is how you make sure you connect the positive to the positive terminal. Simply take a battery aa size works fine. connect the battery to the speaker terminals just touching it the terminals. Note the what the speaker does, it move out when the positive + is connected to the correct terminal. Think I am kidding reverse the connection and see the speaker drive in. |
Cheers gt1953, I'll check that. _________________ 1978 marino yellow Bay Dormobile camper
1969 signal orange Karmann Ghia convertible
1976 martini olive Bay Dormobile camper
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mcdonaldneal Samba Member
Joined: June 13, 2013 Posts: 2639 Location: Gullane, Scotland
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Posted: Fri Jul 08, 2016 3:13 am Post subject: Re: Single, central speaker wiring. Info and question! |
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I'm going to resurrect this thead, because I have a similar problem, but with a different vehicle!
Our Bay camper now has a brand new, NOS, speaker in the centre of the dash. It also has two lateral speakers, next to the doors, mounted under the parcel shelf. All the speakers are 4 ohm. It is a modern radio, with four speaker outlets. The lateral speakers are wired to Front left and right.
My question is; should I just wire the central speaker as rear left OR rear right, or should I tie both rear outlets together, making a mono channel (I suspect this will drive the speaker with too much power, but will it damage the radio amp?)
Any suggestions on how best to wire this three speaker, four outlet arrangement would be appreciated!
_________________ 1978 marino yellow Bay Dormobile camper
1969 signal orange Karmann Ghia convertible
1976 martini olive Bay Dormobile camper
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mcdonaldneal Samba Member
Joined: June 13, 2013 Posts: 2639 Location: Gullane, Scotland
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mcdonaldneal Samba Member
Joined: June 13, 2013 Posts: 2639 Location: Gullane, Scotland
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