SHO-ME Dash Mount Amplifier with Airhorn

SHO-ME Model# 30.2108 Dash Mount 100-Watt Amplifier. This amplifier features a public address system, radio re-broadcast, and an electronic air horn suitable for applications where a siren is not needed or for volunteers who are not permitted to use siren tones.
I decided to showcase the other built-in siren tones (just for the heck of it) by opening up the unit.
Siren tones (Wail, Yelp, Phaser, and Intersection Mode) exists on the circuit board but are not connected to any external switch. This unit is basically a Sho-Me Model# 30.2100 Full Feature Dash-Mount Siren but with fewer buttons and no rotary knob.
This is one of my older videos that I wanted to share. For some reason, this video is slightly out of sync after I uploaded onto KZbin...I apologize for that.

[@Kenhu38]

Yes that is correct. This unit is intended for volunteer public safety professionals who are not permitted to use sirens. This is basically a Sho-Me Model# 30.2100 siren but with fewer buttons tailored for this specific application. Other major brands such as Federal Signal, Whelen, and Code 3 also have their own line of air horn/PA units.

[@titanguitarman]

This makes me curious, so this unit has sirens but no buttons for it to simply keep it a air horn/PA?

[@guyw2002]

can you show what you're shorting/connecting inside?

[@Kenhu38]

Basically I was completing the circuit on the circuit board for each of the siren tones: Wail, Yelp, Phaser, and Intersection Mode. The Air Horn already has a red momentary button wired to it. For "Tap" mode, I left that alone since it involved the horn ring function which would require additional circuits to be completed. If I remember correctly, the Tap mode will cycle through all the sirens with each tap of your steering wheel's horn (if wired to it) or to a separate external button. Everything is labeled on the circuit board. So for the Wail and Yelp siren tones; the letters "W" and "Y" are labeled next to their respective metal contacts on the board. The Phaser siren and Air Horn are labeled "P" and "H" while the Intersection Mode is "I". There is "T" for Tap and "R" for Radio Rebroadcast. The positive contact "+" needs to complete a circuit with either "W", "Y", "R", or "T" to get each respective feature to operate. Normally an easy-to-use rotary switch would be wired to these functions ( as seen on the Sho-Me Full Feature Dash-Mount Siren Model 30.2100 ) but there is not, so I used a piece of wire to do the job. This would be a very short video if I did not showcase the other siren tones ( as seen in my Code 3 Air Horn/PA video ).

[@Eng1722]

Does this also have warble and whoop in it

[@Kenhu38]

Unfortunately this model does not have the Powercall siren tones. I checked the circuit board and found no evidence of Warble and Whoop siren chips/circuits anywhere. This is basically a Sho-Me siren model# 30-2100 but configured to have airhorn, Radio Rebroadcast, and PA functions only.