I have recently found out that a 11 ohms siren speaker is actually about 4.3-4.6 ohms in resistance, I have tested many speakers including FS FS100 and whelen speaker, and they all read similarly; However the code3 speaker (C3500 i think) is about 5.5 ohms, Feniex speaker is about 6.5 ohms, and a chinese made 8 ohms siren speaker is really 8 ohms... another Chinese made so claimed "11 ohms siren speaker" is 9.6 ohms... So all these confused me a lot; I used multimeter on all of those above speakers so the testing method is the same for each speaker.
I guess I should trust the big names eg. FS and Whelen that a "11 ohm speaker" is really a 4 ish Ohm speaker? When connecting all those speakers above individually to my FS PA300 and HHS3200 siren amp, they all performed differently on the actual current drawn; those speakers that are actually 4 ish Ohms produced more current than all those Chinese made speakers, however I didnt notice huge differences on the current drawn between the code3 C3500 speaker and the FS FS100 speaker (5.5 ohms vs 4 ohms).
I understand that "11 ohms" refer to impendance whereas my measurements are in resistance, but shouldnt the resistance be the same to make impendance the same? And shouldnt any speakers that has less resistance (FS100 4 ohms) be lounder and draws more current that those speakers that has more resistance (code3 c3500 5.5ohms for example)?
I guess I should trust the big names eg. FS and Whelen that a "11 ohm speaker" is really a 4 ish Ohm speaker? When connecting all those speakers above individually to my FS PA300 and HHS3200 siren amp, they all performed differently on the actual current drawn; those speakers that are actually 4 ish Ohms produced more current than all those Chinese made speakers, however I didnt notice huge differences on the current drawn between the code3 C3500 speaker and the FS FS100 speaker (5.5 ohms vs 4 ohms).
I understand that "11 ohms" refer to impendance whereas my measurements are in resistance, but shouldnt the resistance be the same to make impendance the same? And shouldnt any speakers that has less resistance (FS100 4 ohms) be lounder and draws more current that those speakers that has more resistance (code3 c3500 5.5ohms for example)?