SpectrAlert Classic Filtered DC, MC FWR and FWR FC

electromechanical tone comparison.

[@Nolonger-q8f]

I would say I do like filtered DC better than FWR

[@aidanthetoiletelevatorfire7554]

Filtered DC is better for System Sensor Classics and especially Simplex

[@dantestoner6020]

Definitely Simplex but from what I have read SpectrAlert Classic devices are compatible with FWR looking at the documents