Elk M1 speakers

[little66085]

Happy new year everyone.  OK, maybe I am overthinking this, but how specifically do I wire 2 self contained speakers to the M1?  If I  understand correctly the speakers need to be wired in series on Output 2(supervised).  Is this correct?  Thanks!

 

[RAL]

Output 2 is generally used for exterior speakers and Output 1 is used for interior speakers.  The difference is that Output 2 is siren only, while Output 1 also gets voice announcements.
 
For each output, you want to keep the combined impedance of the attached speakers between 4 and 8 ohms. So if you have two 8 ohm speakers, like the Elk 70 or SP35, connect them in parallel, which will give you 4 ohms.  If you have four 8 ohm speakers, wire 2 speakers as a pair in series (for 16 ohms per pair). Make a second pair, then wire the two pairs in parallel with each other to get a combined result of 8 ohms.
 
For speakers like the SP12F, which are 32 ohms, wire 4 of them in parallel to give you 8 ohms. 

 

[little66085]

Great thanks.  It sounds like a strobe should be installed on OUT3, correct?

 

[RAL]

Great thanks.  It sounds like a strobe should be installed on OUT3, correct?

 
Out3 is a SPDT relay, so sure, you can connect one side of the contact to +VAUX and the other side to the strobe. Then you'll need some rules to turn it on and off at the appropriate times.

 

[little66085]

WHen you say one side, what do you mean?  There is a NO, COM, and NC at OUT3. 

 

[RAL]

WHen you say one side, what do you mean?  There is a NO, COM, and NC at OUT3. 

 
Sorry, I wasn't clear on that.   Connect +VAUX of the M1 to the COM terminal of OUT3 and the red wire of the strobe to the NO terminal.  The black wire of the strobe then goes to NEG on the M1. 

 

[little66085]

Thanks for ALL your help, SIr!!!!

 

[Del91574]

Pay attention to the current draw.