A modified whelen unit from what I remember

@@marks2506 cool

@@marks2506 Yeah, but beware, their newer units are getting the Whelen Cencom Core system. You'll know it when you hear it.

@@chpman2013 Wait why? CHP is pretty much known for their siren.

@@leytone.4809 from what I've heard, the company that makes their current computer system (the Rockwell Collins iForce system) discontinued production, so the CHP has gone to a new computer system, along with a new radio system and lights/siren setup.

Tm4 or 80K??

​@@112ESP to be honest they're really the same sound chip. I know some people report they hear very-ever-so-slight differences between the Touchmaster 4 and Delta series (Omega not included here that's an offshoot family), but I think that has more to do with the fact the tones in-of-themselves are very sensitive to what amps and speakers you run them through, and this can cause VERY slight differences in how the tones are delivered. This is a symptom of them having always been created in analogue silicon (like what Texas Instruments creates VS TSMC). The only thing that that differentiates them is the box/branding/control head feature set, and that the Touchmaster series was to be the successor to the K series. This rig probably had a TM4.

​​@@allwaxnobuffdivision2 yeah, right know i've just heard carefully the way down of the wail and i can confirm that this is TM4 One of the best sirens i've heard in my life