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Myke

Posted 2014-08-09 3:52 PM (#452246)
Subject: Speaker Wiring

Elite Veteran

Posts: 1110
1000

Location: Tulare Ca

Hey There All! I Was Looking Into Putting speakers into the Plymouth ( '58), the problem is i know very little about car audio. I Do Know that i need 8 Ohms impedance for my radio and that i can wire 2 - 4ohm speakers in series to achieve this. but what i dont know is what kind of wattage the radio puts out and subsequently whether or not i need an amp. ive Got a general grasp on ohms and series and parallel, but not on wattage, channels Etc.

d500neil

Posted 2014-08-09 7:51 PM (#452264 - in reply to #452246)
Subject: Re: Speaker Wiring

Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19146
5000

Location: bishop, ca

Mike, if you are going to multiple-speaker-up your ride, you should go to a commercial auto-audio shop and see what-all they've got, and
can do for you.

I've got a schematic for the OEM two-speaker-with fader switch set up.

You can, also, send your radio to a specialist who can remove its guts and install the latest MP3 technology into it..with a drop-down
faceplate, or whatever, on it.

What are you trying to do with your car's sound system?

Myke

Posted 2014-08-09 8:30 PM (#452269 - in reply to #452246)
Subject: Re: Speaker Wiring

Elite Veteran

Posts: 1110
1000

Location: Tulare Ca

Basiclly At The Moment all I Want Is One Speaker In The Front And One In The Rear. Nothing Fancy, Just Simple And Effective.

d500neil

Posted 2014-08-09 11:08 PM (#452275 - in reply to #452246)
Subject: RE: Speaker Wiring

Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19146
5000

Location: bishop, ca

OK; what you should be on the lookout-for is some sort of fader switch, to apportion the sound front to rear.

Radio shack may have one, but OEM guys are available.

Here's what the OEM guy looks like, and here's a so-so image of the wiring diagram.

I've got an 8 ohm 4x6" 3-way speaker in front, and an 8 ohm 6x9" 3-way in back.

Edited by d500neil 2014-08-10 12:12 AM

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Myke

Posted 2014-08-10 1:38 PM (#452322 - in reply to #452246)
Subject: Re: Speaker Wiring

Elite Veteran

Posts: 1110
1000

Location: Tulare Ca

Is one Of The Switches Nessicary Or Just Optional? Also What wattage Rating Should i Try To Stay Below Between the two Speakers?

rushpowersystems

Posted 2014-08-10 2:11 PM (#452323 - in reply to #452246)
Subject: Re: Speaker Wiring

Extreme Veteran

Posts: 524
500

Location: West Jordan

Have not looked it up but given the wire size to the radio it can’t be over 20 watts. I would use the fader, but then I would put a small amp in my trunk and wire a iPod plug into it.

d500neil

Posted 2014-08-10 3:52 PM (#452333 - in reply to #452323)
Subject: Re: Speaker Wiring

Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19146
5000

Location: bishop, ca

I ran the two 8-ohm speakers to the standard Dodge pushbutton radio, both without, and then with, a fader switch installed.

IIRC, the sound from the powerful 6x9" rear speaker was not very high, with or without the fader switch, but the sound level was
certainly OK.

Then, I bought and installed the powerful Signal-Seeking Dodge radio (model 918---but not 918HR, which is internally wired & socketed
for the HiWay HiFi connection)...which does have an external power amplifier, which is remotely-wired to the radio.

And then, later, installed the long-owned FM converter (which can be used to receive Sirius Satellite radio signals, via
a portable-receiver; that's why the velcro pad is attached to the dash, in the photo).

Overall sound quality and volume is very good, but the fader switch's wiring-construction, and, the FM converter(!) may create considerable sound distortion at high volume levels.

There have never been any 'switches' installed in the system, other than for the fader switch.....which de facto acts more
like a front:rear differentiator, than a true "fader" control.

But, it is a Kool addition to the dash.

Here's my set up, with vintage Motorola FM converter (held to dash with "plumber's tape", for easy under-dash service-access/removal):

Edited by d500neil 2014-08-10 4:23 PM

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1961plymouthfury

Posted 2014-10-09 11:12 PM (#458677 - in reply to #452246)
Subject: Re: Speaker Wiring

Expert

Posts: 2635
2000

Location: Minor Hill, TN

I wonder will I be able to use Pioneer speakers with the original AM radio to my '61 fury. I also have an FM converter for it . I also plan to get a CD changer for it later on down the road

jimntempe

Posted 2014-10-10 3:36 AM (#458688 - in reply to #452246)
Subject: Re: Speaker Wiring

Expert

Posts: 2312
2000

Location: Arizona

Most of these old AM radios were only 1.5 to 3 watts audio output.

miquelonbrad

Posted 2014-10-14 9:46 AM (#459166 - in reply to #452246)
Subject: Re: Speaker Wiring

Expert

Posts: 1737
1000

Location: Hay Lakes, Alberta, Canada

Also, if you are using your original radio, and it hasn't been modified, the speakers should only be 3 to 4 ohms each. The 8 ohm ones came later, and can damage your output transistor, due to the increased load value you are placing on it. You can also get distortion at higher volume levels, due to the incorrect speaker impedance.

jimntempe

Posted 2014-10-14 3:15 PM (#459202 - in reply to #452246)
Subject: Re: Speaker Wiring

Expert

Posts: 2312
2000

Location: Arizona

Isn't that backwards? The old speakers were 8 ohms and new ones are usually 4 ohms. Less ohms allows more power thru and that can burn up the output transistors if you turn it up real loud.

ttotired

Posted 2014-10-14 6:36 PM (#459227 - in reply to #452246)
Subject: Re: Speaker Wiring

Expert 5K+

Posts: 8443
5000

Location: Perth Australia

Your right Jim

8 ohms is correct, 4 ohm will cook your radio

LD3 Greg

Posted 2014-10-14 11:43 PM (#459269 - in reply to #452333)
Subject: Re: Speaker Wiring

Expert

Posts: 1906
1000

Location: Ontario, Canada

Neil,
Looking at the pic of your dash, do you have one of those neat ignition switch bezels that have the illumination ring built in?
Greg

d500neil

Posted 2014-10-15 1:40 AM (#459279 - in reply to #459269)
Subject: Re: Speaker Wiring

Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!

Posts: 19146
5000

Location: bishop, ca

LOL...never heard of such a critter!

LD3 Greg

Posted 2014-10-15 9:20 AM (#459299 - in reply to #459279)
Subject: Re: Speaker Wiring

Expert

Posts: 1906
1000

Location: Ontario, Canada

They were rare, or at least I only saw 2 at the most. They had a bluish green plastic ring between the bezel and switch and even harder to find was a tubular cast alum. Housing that fastened to the outside of the switch (I believe with a set screw) and it had a hole to mount a regular instrument panel light socket. Orange wire along with the instrument panel lights.

I doubt I still have one but I will look. Very similar to the ones Chrysler used as "standard"? in 1960 and later.

Either 57 or 58 Dodge, I don't know.
Greg

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