Connecting a second siren to run along with my C3 Mastercom - how to?

PJD642

New Member
May 20, 2010
1,543
east of Cleveland
As some may remember from last winter, I had issues with the siren speaker in my cruiser freezing and not working last winter. I ended up replacing the old setup (Sho-Me 30.2109 remote siren & Sho-Me 30.0200 speaker) with a 200 watt C3 Mastercom and two SA-315P speakers. Everything works fine now and I'm very happy with how things turned out.


But...I've got that extra speaker & siren laying around. So I'm thinking I may want to run dual tones, but have a couple of questions:


1) Since I'm running 200 watts from the Mastercom, will the 100 watts from the Sho-Me be sufficiently audible or will it be pretty much drowned out?


2) I don't want extra switches to fiddle with. Ideally, I want to operate both sirens from the rotary knob on the Mastercom, but I don't have a wiring diagram for the Mastercom. Is it as simple as connecting the trigger wires for the Sho-Me to the different tone wires on the Mastercom, or am I gonna have to play with relays and shyt?


3) If it were you, would you set the Sho-Me to "Wail" and have it stay there regardless of the tones from the Mastercom, or have the Sho-Me change with the Mastercom, i.e.: Wail with Wail, Yelp with Yelp, and Hi-Lo with Phaser?
 

localhero800

Member
May 22, 2010
1,333
Southeast Missouri
Set the "wail" on the Sho me to one of the switches, or to Slide position 3 on the mastercom. then just turn it on and you can do whatever with the mastercom siren.


The mastercom 200w will not "drown-out" the 100w sho-me.. it WILL be louder, but wont drown it out to the point you cant hear it..


That is how i have my mastercom set-up in my truck. It is on Switch "D" which is all the way to the right. i press that switch, "wail" sounds, then i can do whatever i want with the mastercom siren tones.
 
Jan 20, 2011
1,264
Lake of the Ozarks
localhero800 said:
Set the "wail" on the Sho me to one of the switches, or to Slide position 3 on the mastercom. then just turn it on and you can do whatever with the mastercom siren.

The mastercom 200w will not "drown-out" the 100w sho-me.. it WILL be louder, but wont drown it out to the point you cant hear it..


That is how i have my mastercom set-up in my truck. It is on Switch "D" which is all the way to the right. i press that switch, "wail" sounds, then i can do whatever i want with the mastercom siren tones.

That's exactly how I did my friends. Hide the Sho-Me(or keep it where ever actually) and set it to the tone you want(Wail, Yelp, etc.) and put it to a switch. Hook up the siren just like normal except put the + to the switch. Hit the switch and your siren is on! Another thing, on my MasterCom you can make the switches momentary so you could do that too. Put it to Phaser and hit at intersection and use Hi-Lo or other tone on your C3. That's how I might do it, just depending on what you want, IMO.


Good luck!


Caleb
 

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