Wheelock 34T-24 on a Notifier NFS-320

[NewAgeServer]

The NFS-320 and the FCPS-24 (assuming there are any in that system) do not put out FWR.

Notifier & Fire-Lite: Filtered or Full Wave Rectified?

Here is an article for determining whether a Notifier or a Fire-Lite panel puts out Filtered or Full-Wave Rectified (FWR) power. Here are the definitions of the two by how a lot of people know them. How does a mechanical horn sound on… Filtered: Smooth FWR: Raspy Here are some notes about FWR, and why FWR is so bad and should not be used anymore: FWR uses more current, meaning that less devices can be used on the circuit. All simplex panels put out Filtered power, and therefore S…

Electromechanical horns do sound raspy on FWR, however.
When you compared them to 9838s, are you talking about when a 9838 sounds smooth and nice or when it sounds raspy (if powered by FWR) ?

Another possibility is that the NAC is overloaded, and unable to provide enough power for the signals on the circuit. In that case they should have installed a NAC booster panel such as an FCPS-24S8 in the NAC to keep the power source strong.