[Jukebox-list] Extention speaker

[Jay Hennigan]

rockolakid wrote:
> Thanks Dave/Ron,
>                             There is no voltage tapings on the amp, but 
> there is a little slide switch that moves between LOCAL SPEAKER and 
> ADDITIONAL REMOTE SPEAKER ( I presume you have to throw this switch) and 
> a connector strip  with connection points A.B.C,  B-C are linked, I 
> presume the extension speaker goes somewhere? on these connectors, but 
> it doesn't give any size limits, sorry I dont yet have a drawing, Thanks

The switch moves a transformer tap to a lower impedance point to 
accommodate the additional load.

Terminal A is ground.

Terminal B is the pole of the slide switch, amplifier output.

Terminal C goes to the cabinet speaker.

To connect a regular low-impedance extension speaker, put the switch in 
the "Additional remote speaker" position, connect the external speaker 
between A and B, and leave the jumper in place to allow the internal 
speaker to continue to play.  If the extension speaker will be in the 
same room as the jukebox, swap the wires to it both ways for best bass 
response to ensure proper phasing.

Or, you can get a 70-volt transformer and connect the external speaker 
to the "500 ohm" terminals through the transformer.  This will allow you 
to selectively control the volume to the extension speaker with the 
transformer taps.  500 ohms is 10 watts on a 70 volt system.  For lower 
volume to the external speaker, select a lower wattage tap.  Similarly, 
swap the wires for best bass.

To lower the volume of the cabinet speaker if it is too loud in 
comparison to the remote, you will need an L-pad.  Connect the hot to 
terminal B, the ground to terminal A, and the center to terminal C. 
Remove the B-C jumper.

See:  http://www.verntisdale.com/schem/1448.jpg

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