Old Kraco stereo no negative speaker wires

[Dan]

Hello,

I recently came into possesion of an old Kraco AM/FM/CB shaft radio
(NOS). I want to mount it in my Jeep. Problem is.....the factory
wiring "harness" consists of 4 wires: Power,Ground,Left speaker + and
Right Speaker +.......no speaker -'s

Any ideas ?

Thanks, Dan

[isaeagle4031]

IIRC the ground is also the speaker -


--
isaeagle4031

[e-nigma]

"Dan" > wrote in message
...
> Hello,
>
> I recently came into possesion of an old Kraco AM/FM/CB shaft radio
> (NOS). I want to mount it in my Jeep. Problem is.....the factory
> wiring "harness" consists of 4 wires: Power,Ground,Left speaker + and
> Right Speaker +.......no speaker -'s
>
> Any ideas ?
>
> Thanks, Dan


The ground wire is also the speaker negatives

[GregS]

In article >, wrote:
>Hello,
>
>I recently came into possesion of an old Kraco AM/FM/CB shaft radio
>(NOS). I want to mount it in my Jeep. Problem is.....the factory
>wiring "harness" consists of 4 wires: Power,Ground,Left speaker + and
>Right Speaker +.......no speaker -'s
>
>Any ideas ?

The radio does not a have a bridged output. The maximum output into 4 ohms
will be about 4 watts vs 16 watts bridged. Take 14 volts dived by 2, times .707,
times itself, divided by 4. Half that wattage for 8 ohm speakers.

There is voltage loss in the semiconductors, so absolute voltage is
not relistic.

greg

[GregS]

In article >, (GregS) wrote:
>In article >,
> wrote:
>>Hello,
>>
>>I recently came into possesion of an old Kraco AM/FM/CB shaft radio
>>(NOS). I want to mount it in my Jeep. Problem is.....the factory
>>wiring "harness" consists of 4 wires: Power,Ground,Left speaker + and
>>Right Speaker +.......no speaker -'s
>>
>>Any ideas ?
>
>The radio does not a have a bridged output. The maximum output into 4 ohms
>will be about 4 watts vs 16 watts bridged. Take 14 volts dived by 2, times
> .707,
>times itself, divided by 4. Half that wattage for 8 ohm speakers.
>
>There is voltage loss in the semiconductors, so absolute voltage is
>not relistic.

When bridging first started being more common back in the late
70's, they called those units high power. ALl of 16 watts, and the companies
use all kinds of ploy to make it appear higher than 16 watts.

My first high power external amp was the Craig
Powerplay with 35 watts / ch. About the biggest amp available at the time.
It has to use a internal DC-DC converter power suply using transistor
swithching to get more power from the 12 volt system. Later, Mosfet switching
became normal, providing more efficiency. Vertually all modern amps are transistor
amps with Mosfet power supplies, except for direct switching amps, and they call them
switcjing amps, not Mosfet amps.

So you really didn't want to know all this anyway.

greg